About Chemistry, Environment, Waste Management and Green Life Inspirations

10 November 2010

How to Convert Switchgrass to Ethanol

By Joshua Smyth, eHow Contributor
updated: October 18, 2010


This field could fill your gas tank.
field image by Marek Kosmal from Fotolia.com


Biofuels such as ethanol are compounds derived from plants that can be used to fuel internal-combustion engines such as those in cars and small machinery. Creating these fuels from plants can reduce the environmental and political problems caused by a reliance on oil. Although much ethanol production, especially in the United States, comes from corn, switchgrass is a promising alternative. It is a North American native grass that can grow on marginal land without the extensive inputs that corn or sugar cane require, and it produces a much better energy yield. Making ethanol from switchgrass, though, is a challenging process.

Things You'll Need:
  • Switchgrass seeds
  • Field
  • Harvesting machinery
  • Refining tanks
  • Cellulase enzymes
  • Yeast
Plant switchgrass seeds during the spring planting season. Unlike many other crops, switchgrass is a wild grass that doesn't need special care or fertilizer inputs. It can be planted on marginal land that wouldn't support food or staple crops.

Harvest the switchgrass in the autumn after the first frost kill. The switchgrass must be mowed down and then baled. Since producing enough switchgrass to usefully refine involves large fields of the plant, the harvest must be done with farm equipment. This involves using a tractor with a mowing attachment to cut down the switchgrass, and then using a towed or self-propelled baler to gather it into bales.

Process the switchgrass for refining. The bales of harvested grass must be chopped into smaller pieces to accelerate the process of enzymatic hydrolysis (adding water and special enzymes) that will convert the cellulose in the switchgrass to sugars.

Mix the chopped switchgrass with water in a large tank and add cellulosic enzymes that can digest the cellulose into sugars that can be refined to ethanol. The major source of these enzymes is Novozymes, a Danish company that specializes in agricultural biochemistry. The cost of these enzymes is the major stumbling block to economically viable switchgrass ethanol production. To be economically viable, a refining operation needs to be able to handle 5,000 to 10,000 tons of grass each day.

Remove the processed cellulose from the water and add special yeasts, which should be available from the same supplier as the enzymes. The yeast will refine the sugars in the water into ethanol, in a process similar to wine production.

Distill the ethanol from resulting liquid by boiling the water off and collecting the ethanol in a separate tank. To distill pure ethanol, benzene or cyclohexane must be added to the mixture. These chemicals bind to and remove the last small bits of water from the distillate. Some processing operations use special microscopic filters instead. If trying this on your own, always check local regulations on home alcohol distillation, as ethanol is a type of alcohol.

Tips /Warnings
  • Producing economically viable ethanol from switchgrass involves large planted areas and large refineries. Doing this at home will likely produce quantities too small to be useful, but can be an interesting experiment.
  • Governments and private companies are researching cheaper and better enzymes to refine switchgrass; until a better one is found, commercial production beyond test plants is unlikely.

References
Harvest Clean Energy: Creating Cellulosic Ethanol: Spinning Straw into Fuel
Wired Magazine: Cellulosic Ethanol: One Molecule Could Cure Our Addiction to Oil
Iowa Switchgrass: Harvesting
Home Distillation of Alcohol: Theory

Read more: How to Convert Switchgrass to Ethanol | eHow.com http://www.ehow.com/how_7356509_convert-switchgrass-ethanol.html#ixzz14tPAHVqB

09 November 2010

How to Make Ethanol Alcohol

By Amanda Kondolojy, eHow Contributor
updated: August 20, 2009




Make Ethanol Alcohol


Agrospace
Ethanol alcohol is a great gasoline additive that will help you increase your car's fuel efficiency. If you own a car that can handle E-85, then ethanol alcohol can be used as 85% of this gas alternative. However, before you attempt to make ethanol alcohol for your own personal use, make sure to consult your local law professional, as it is illegal in many states to produce your own ethanol for automotive use without a special permit.

Things You'll Need:
  • Ethanol distiller
  • Water boiler
  • Alpha amylase
  • Glucoamylase
  • Yeast
  • Grain
  • Water
  • Plastic barrel
Decide on a commonly available feedstock for the ethanol. This can be any type of grain, including rice, corn or soybeans. Once you have decided on the feedstock, grind it up and then weigh it.
Find out how much water your boiler can handle. Then go to the ethanol materials calculator at The Ethanol Source (see Resources) and plug in the weight of your materials as well as your boiler's capacity to find out how much yeast and sugar you will need.

Add alpha amylase enzyme in the proper proportions to the measured water and feedstock. Boil this mixture for an hour to kill any bacteria. Remove the mixture from heat and then add glucoamylase.

Add yeast to the mixture and store in a covered plastic barrel. Leave it for 3 to 5 days to ferment. Because Ethanol is flammable, it is best to leave this outside is a protected area.

After fermentation is complete, put the mixtrure through a distiller to remove excess water from the mixture. Once the distillation process is complete, store the ethanol in a plastic container in a protected area.

Tips / Warnings
  • It is very important to obtain an ethanol-producing license before attempting these steps.
  • Make sure you have proper containment facilities before you make the ethanol, as it is very flammable.

Resources
Resource Calculator at The Ethanol Source



Japanese Institute Succeeds in Extracting 'Green Crude Oil' from Blue-Green Algae

JFS/Japanese Institute Succeeds in Extracting 'Green Crude Oil' from Blue-Green Algae
Copyright Central Research Institute of Electric Power Industry

As a project funded under NEDO's "Grant for Industrial Technology Research Program", NEDO and the Central Research Institute of Electric Power Industry (CRIEPI) in Japan announced on March 17, 2010, that Hideki Kanda, Chief Scientist of CRIEPI, successfully developed a method to extract a high yield of "green crude oil" from blue-green algae at room temperature using liquefied dimethyl ether (DME).
Green crude oil is a general term for oily substances in the cells of microalgae, and there has been some ongoing trial utilization of the substance as an alternative to petroleum for fuel. Traditional methods to extract green crude oil pose some problems because of their complex steps, such as drying, breaking cell walls, and using and removing toxic solvents, which require considerable energy.
The method was developed to overcome these problems by taking advantage of liquefied DME's unique ability to mix with water and oil. Because it can dewater blue-green algae and extract oils from it concurrently at room temperature, the amount of energy required for dewatering and drying can be reduced drastically when compared to conventional methods. In addition, with no organic solvents required for extraction, the process has the potential to be a low-cost and environment-friendly method of extraction. CRIEPI successfully extracted over 60 times more green crude oil (based on the dry blue-green algae weight) in its experiments than traditional methods.
The practical application of this liquefied DME extraction process needs further basic experiments using various algae and development of the technology that can concentrate green crude oil in DME. CRIEPI plans to conduct further experiments and improve this new method.
Successful Extraction of "Green Crude Oil" from Blue-Green Algae
http://criepi.denken.or.jp/en/activities/pressrelease/
2010/03_17.html

http://criepi.denken.or.jp/en/activities/pressrelease/
2010/03_17.pdf

Hemicellulose-Degrading Bacterium Isolated from Livestock Feces

JFS/Hemicellulose-Degrading Bacterium Isolated from Livestock Feces
Copyright NILGS
Japan's National Institute of Livestock and Grassland Science (NILGS), National Agriculture and Food Research Organization, announced on August 4, 2010, that it had successfully isolated an extremely thermophilic anaerobic xylan-degrading bacterium from sheep feces through joint research with the University of Georgia in the United States. This bacterium can even grow at temperatures above 70 degrees Celsius and degrade xylan, a component of hemicelluloses included in straw and other agricultural waste. This is the world's first isolation of thermophilic anaerobic bacterium whose growth rate is highest at or above 65 degrees Celsius, from livestock feces.


The research group inoculated sheep feces into a culture medium containing xylan, cultured it at 74 degrees Celsius in anaerobic conditions, and then isolated the new xylan-degrading bacterium. Growing on xylan as a source of carbon and energy, the bacterium can degrade various kinds of xylan such as xylans from beech or oak trees to xylose which can be used in making biofuel. Its growth ranges are 44 to 77 degree Celsius (70 degrees Celsius is the optimal temperature) and pH 5.9 to 8.6 (optimum 7.2) in anaerobic conditions.
The bacterium was named Caldicoprobacter oshimai and certified as a new family. A family is positioned above a genus, which is above a species. The bacterium strain was sent to the ATCC and DSMA, located in the USA and Germany, respectively. The strain can be used for nonprofit purposes.
NILGS expects that the new bacterium will promote the use of previously unused biomass such as straw as biofuel, and also be used as a new genetic resource.
National Institute of Livestock and Grassland Science official website
http://nilgs.naro.affrc.go.jp/index-e.html

05 October 2010

SOLAR HYDROGEN POWER FOR HOMES

 by Bruce Mulliken, Green Energy News
Utility companies need not lose any sleep: It will be a long time before significant numbers of homeowners in the industrial world will be able to disconnect from the grid. While the cost of generating power from intermittent renewables, such as solar and small wind, may be dropping (with generous government incentives to help), the cost of storing power is still prohibitively high. If intermittent renewable energy can’t be stored then the power cable between home and grid can’t be disconnected.
(Lucky the developing world, though. Where there is no power grid, the norm of the future may be to install independent home generating stations rather than build a formal power grid infrastructure. If so, the developing world will have the green state-of-the-art power system while the industrial world will keep its outdated, inefficient, dirty, centralized power distribution system.)
Batteries, for the time being, are currently in the forefront of energy storage for homes. But, Sun Catalytix of Cambridge, Massachusetts thinks a better solution would be to use electricity from solar photovoltaic panels to split water into hydrogen and oxygen and store both gases in tanks to be fed into a fuel cell to generate power (and perhaps heat) when the Sun drops below the horizon. Solar energy plus energy storage in the form of hydrogen and oxygen would equal an off-grid, personalized energy system.
Daniel Nocera, Ph.D. in discussing his work on solar hydrogen systems at Sun Catalytix, and his day job at the Massachusetts Institute of Technology, said at the 240th National Meeting of the American Chemical Society, "Our goal is to make each home its own power station. We're working toward development of 'personalized' energy units that can be manufactured, distributed and installed inexpensively. There certainly are major obstacles to be overcome — existing fuel cells and solar cells must be improved, for instance. Nevertheless, one can envision villages in India and Africa not long from now purchasing an affordable basic system."
solarfuelcell526
A new catalyst could help speed development of inexpensive home-brewed solar energy systems for powering homes and plug-in cars during the day (left) and for producing electricity from a fuel cell at night (right).
Credit: Patrick Gillooly/MIT
With stored pure oxygen in tanks being used to feed the fuel cell, the power plant is bound to be more efficient than a typical hydrogen fuel cell which would use oxygen from the surrounding air to combine with hydrogen to generate electricity. Air, after all, is only about 21 percent oxygen. With 100 percent oxygen a fuel cell should work very well. Nocera’s work is to improve the oxygen generation capabilities of electrolyzers which split water. His low-cost catalysts wouldn’t require expensive platinum and would be able to boost oxygen production by 200 times. That’s a lot of oxygen.
Still, as much as solar-hydrogen-oxygen power systems seem appealing they would have to be made safe. Storing oxygen is dangerous business. Pure oxygen in itself doesn’t burn, and is not considered a flammable gas. Oxygen, however, does support – with great gusto – the burning of other substances. It’s the oxygen component in air that makes things combust or oxidize. Oxygen stored in tanks must always be treated with caution. Pure oxygen and hydrogen are fuels of rocket engines, by the way.
If the Nocera/Sun Catalytix catalyst works well and gas storage can be made safe, then this energy storage could be a competitor to batteries, provided hydrogen fuel cells, too, come down in cost. Using pure oxygen instead of air should allow the fuel cell stack – the core of a fuel cell – to be smaller thus decrease its cost.
Links
American Chemical Society
http://www.acs.org

PLASTOLEUM ( Plastic to oil)

MUTHUKUMARAN VENKATACHALAPATHY
VILLUPURAM, TAMIL NADU INDIA

Sustainable Technologies
Jun 7, 2010


Petroleum and plastic cannot be explained discretely, as plastic is nothing but one of the many useful products derived by processing petroleum. Plastic is obtained when crude petroleum is processed and treated with a few other additives. This would basically make plastic a polymer of hydrocarbon with few other elements.

If plastic can be made from hydrocarbons they can also be reverted back into oil. This has already been proven by experiments and trials have also come out fruitful.We intend to propose a processing unit to use this waste and get some fuel. The pros in this are two fold. First being reducing environmental pollution to a great extent and second, to get more of the black gold, both of which are the dire needs of the hour.

Degradation of polymer in plastic occurs when the long chain of monomers breaks at certain points. Plastic waste can be converted into liquid hydrocarbons by random de-polymerisation. The process is carried out in a specially designed reactor in the absence of oxygen and with Zadgaonkar’s catalytic additive and Solar furnaces.
Maximum reaction temperature is 350deg C and there is total conversion of waste plastic into value-added fuel products.

The intended technology shall use a process called catalytic pyrolysis and infrared source with different range of frequencies (backup), which can act on hydrocarbon materials to efficiently convert plastics to crude oil. Forced air, heated by solar furnaces/burner, shall be used to indirectly heat the feedstock inside the process vessel. The energy transferred to the plastic feedstock from the burner shall be used to depolymerise, or crack, the plastic into synthetic crude oil.

Oil shall be chromatographically removed from the waste plastic and aggregated from several vessels for on-site micro-refinement.A single module is expected to produce up to >750 litres of crude oil for every ton of typical plastic waste processed. System capacity can range from 200 tons to 400 tons of plastic wastes processed per month.

The natural gas and sludge left over after oil extraction from plastic waste shall be used to run the (backup) far infrared ray heating system that breaks down the plastic fed into the generator. This technology is extremely safe. And because the system does not incinerate the plastic, there is little cleanup involved and there are virtually no emissions.The technology shall be capable of breaking down any plastic waste into oil, though some plastics may produce more oil than others.

A reactor shall convert waste plastic feedstock into oil through low temperature thermal cracking (Using Solar furnaces) in a vacuum, extracting the hydrocarbons embedded in petroleum-based plastic waste with the use of a catalyst. Some of the by-products of the conversion process may be made use to power the unit. Vent gas may be recycled to provide electricity and excess oil residue is transformed into emulsified heavy oil.This is carbon negative as an oil producer and the CO2 released by the reactor shall be minimal.All types of plastics can be transformed into oil using this technology.

14 August 2010

Ethanol for Alternative Fuel

Ethanol can generate energy when used in internal combustion engines similar to gasoline. Ethanol fuel is the same type of alcohol that people drink. A renewable biofuel alternative for internal combustion engines it is one of the most adopted biofuels in existance. The United States and Brazil produced 89% of the world’s ethanol in recent years. Ethanol can be produced large scale using fermented sugar or hydrating ethlene. It can even be made from petroleum. It is extremely simply to manufacture ethanol from common crops. There is an additional source of ethanol being developed that will produce it from algae.
The most common production fuel is crops that could otherwise be used as food such as sugar cane and corn. This has led to concerns over using ethanol as a fuel because of the impact it has the global markets for certain crops. Cellulosic ethanol is a new experimental form of ethanol that aims to alleviate this concern.
Cellulosic ethanol can be made using any plant material. This means an expansion in the types of crops and waste of agriculture that can be used to produce ethanol. When this new form of ethanol production is perfeted ethanol could become very widely adopted as the primary concerns over the fuel source will be eliminated.
As additional bonus to using any biofuel like ethanol is that the carbon emissions during combustion are negated or nearly canceled out by the carbon uptake during the crop growth. Future biofuels such as fourth generation biofuels might even be carbon negative taking in more carbon during production than is expended with use.
There is no doubt that ethanol is a viable alternative and renewable energy fuel. However, there are some things to keep in mind. Let’s recap the advantages and disadvantages of ethanol fuel.
Pros of Ethanol Fuel
* Using crops as an energy source makes ethanol a renewable energy.
* Vehicles have been sucessfully converted to ethanol.
* Cellulosic ethanol will solve the food market problems ethanol has.
Cons of Ethanol Fuel
* Not very resistant to water contamination and can be corrosive.
* Cellulosic ethanol hasn’t been completed yet so the food crop problems still exist.

Plastic to Energy

Plastic can be used for energy in a few different ways. The most obvious way and one you’re probably quite familiar with is recycling. This saves tons of energy in the form of materials and labor used to harvest them. However, what I’m more concerned about for this article is converting plastic into oil and using synthetic oils to create plastic. Both of these are relatively new concepts that have only been tested in laboratory settings. Commercial scale operations are still quite a ways off. With the abundance of plastic that ends up in landfills and the ocean though this could be a great new alternative energy source. Especially if oil created from waste plastic could be refined to produce gasoline and other useful hydrocarbons.
First let’s talk about converting plastic into oil.
There are a handful of facilities that produce oil from waste plastics and they all use different techniques. One company is using catalytic pyrolysis to convert plastics. A single “module” or building unit can produce over 700 litres of oil out of every ton of plastic waste that is processed. The entire system can process between 200 and 400 tons in a month so there is a considerable amount of oil that can be obtained. If more plastic needs to be converted then additional buildings can be built. The system is designed to be self contained so additional units can be built for expansion.
Here is a video fly through of a waste plastics to bio oil facility located in Korea. Skip ahead to one minute where the actual facility part starts. Although it’s lacking descriptions it is pretty clear what the process is.

Creating plastic with synthetic oil or artificial oils.
This is a very new technique that is only just starting to be used for commercial development of oil and plastics. The idea behind it is actually quite simple. Biomass with specific bacteria added will break down into gasoline or diesel fuel. Overall the goal is to eventually be able to produce a variety of hydrocarbons which plastics could be made from. Right now the company that is bringing this into production plans to have products on the market by the second quarter of 2009.
In addition to creating plastic from synthetic oil there have been a variety of attempts to replace plastic with other materials. For example, a company is using wood sawdust chemically altered to produce a plastic like material. Cullulose has been used to create plastic bottles and bags that are also biodegradable. All of these technologies will have a place in replacing and updating our ideas of what plastic should be used for.

Fourth Generation Biofuels

Fourth generation biofuels is a term that I’ve seen presented as various different technologies so it’s hard to really define exactly what these fuels are. One definition of a fourth generation biofuel is crops that are genetically engineered to consume more CO2 from the atmosphere than they’ll produce during combustion later as a fuel. Another definition is genetically engineered crops similar to the ones just mentioned but combined with synthesized microbes that will convert the biofuels produced into even more efficient fuel. For example a plant could be grown then converted into a fuel which is then exposed to a microbe that changes it directly into gasoline. Yet another definition is genetically modified or synthesized microbes that convert CO2 in the atmosphere directly into usable fuels.
With all these different definitions of what a fourth generation biofuel is its no wonder that it can be so hard to find a solid explaination. The answer is that no one really knows what a fourth generation biofuel is yet except everyone seems to agree it involves genetic modifications.
However, even though it involves genetic modifications that can’t be the sole definition. Let me recap the different biofuel generations for you. First generation biofuels are the fuels currently in use such as biodiesel. Second generation biofuels are similar fuels but produced from non-food crops. Third generation biofuels are genetically modified crops that capture more CO2 from the atmosphere resulting in a carbon neutral fuel. This third generation is why fourth generation has to be more than simply genetically modified crops. So, what is a fourth generation biofuel then? I would define a fourth generation biofuel as biofuels that result in a negative carbon impact when combusted.
Since third generation biofuels result in a carbon neutral impact and many examples of a fourth generation biofuel mention more carbon being consumed than is released during use this seems like a suitable definition.
The idea of a carbon negative biofuel is an extremely good one if you’re concerned about the effects of global warming due to CO2 levels in our atmosphere. Not only would it allow us to have a renewable non-food crop based biofuel for various uses but also cut down on global warming so it’s a sort of double whammy. I’m personally not convinced global warming is due to increased CO2 levels but it’s good to know there are viable solutions already reaching laboratory enviornments and not just stuck in theory.

Solar Electrical Power

Solar electrical power works by the conversion of light into other forms of energy. When you think of solar power the first thing that comes to mind is probably solar panels being used to generate electricity. This is known as photovoltaics. However, solar power is used for a lot more than just generating electricity.
Solar power has been used throughout human history for a variety of things:
* Heat engines: Concentrating light to generate heat to drive an engine.
* Space heating: Converting light to heat and trapping it inside buildings.
* Water distillation: Purification of water using evaporation.
* Water heating: Converting light to heat for warming water.
* Photovoltaics: Conversion of light to electricity for a variety of uses.
We’ll be focusing on how photvoltaics work here as I imagine that’s what you’re most interested in. More specifically our focus will be photovoltatic panels. There are in fact multiple types of photovoltaic energy sources though. So, what is a photovoltaic solar cell (PV cell) and how does it convert light to electricity? Quite simply they rely on the photoelectric effect. This is a quantum electronic phenomenon where electrons are emitted from matter after electromagnetic radiation is absorbed. Light is a form of electromagnetic radiation.
Light hits the solar panel and is absorbed by a semiconducting material like silicon. Some of the light is reflected back and lost but a special layer designed to reflect light back at the cell recovers some. Electrons (negative charged) come loose from their atoms (photoelectric effect) allowing them to flow through the material.
Solar panels have a special composition that only allows these electrons to move in a single direction. Now that this negatively charged electron has come loose in its place is a positive charged “electron hole” which flows in the opposite direction. The electron and “electron hole” move in their respective directions until reaching metal plates which are connected. This action creates direct current electricity.
The amount of knowledge that goes into understanding all the details of how solar power works could fill a book and many books exist that cover them more extensively. Check out the environmental impact of solar power as well. However, the above information covers all the basics of know about how photovolatic panels work. If you want to learn more about how solar panels work wikipedia has an excellent detailed explaination that goes very far into the science of each individual part.
I hope you’ve found my explaination helpful and have learned something here today. If you’re interested in other forms of photovoltaic energy you should look up concentrating photovoltaics (CPV) or fresnel lens sterling engines.

Bio Butanol Fuel

Bio butanol fuel can generate energy when used in internal combustion engines similar to gasoline. However, for a variety of reasons it may actually be better than gas. First, let’s talk about compatibility with existing vehicles though. The air to fuel mixture ratio is 11.2 compared to gasoline which is 14.7. The energy content of Butanol is 105,000 Btu per gallon compared to gasoline’s 114,000 Btu per gallon. This similarity between air to fuel miuxture and energy content means conversion of existing vehicles would be very simple.
You can mix Butanol with gasoline in small ratios and use it in most unmodified vehicles meaning even without a direct Butanol conversion you can use it as a fuel source. This would be a great way to use an alternative fuel in your car without needing to purchase anything but the fuel.
Production of biobutanol can be achieved using biomass as well as from fossil fuels. There is no chemical difference between biobutanol or petrobutanol. It is even possible to create biobutanol using solar energy with the help of algae or diatoms.
Butanol tolerates water contamination and is less corrosive than other gasoline alternatives. Additionally, because of its low vapor pressure point and a high flash point Butanol is safe to handle, transport, and use at high temperatures.
There are some problems with the use of butanol as a energy source. Let’s recap both the positives and negatives of butanol as a fuel.
Pros of Butanol
* Can be produced using a few renewable energy sources.
* Simply conversion to adapt gasoline vehicles.
* Safer and easier to implement than other gasoline alternatives.
Negatives of Butanol
* Requires a fuel flow increase in order to make up for the roughly 10% decrease in energy content compared to gasoline.
* Some fuel systems won’t run butanol without some modification except at low ratios to gasoline.
* Gas gauge will probably read wrong either positive or negative.
* Exhaust from combustion of butanol is more toxic than normal.
The current energy landscape means that butanol will probably be reserved as a fuel source except if we were to run out of oil/gasoline supplies. However, it is an interesting alternative fuel and a renewable one at that.

03 August 2010

Nuclear Waste: Solved

By Nick Hodge | Tuesday, August 3rd, 2010
Glass has been on the minds of many lately.
For a while yesterday, “Gorilla Glass” was the most popular search trend on Google, after Corning (NYSE: GLW) began touting the shelved 1962 invention.
Until now, there's been no market for the super-strong glass that's hard to break, dent, or scratch, and that's three times stronger than chemically strengthened soda-lime glass when half as thick.
Analysts say the product is about to undergo a multi-billion dollar bonanza as electronics companies buy tons of it to make frameless TVs thinner than a dime.
And that's not even the most exciting glass story hitting the wire...
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The $54 Billion Cleantech Surprise... No News Outlet Covered
You won't see the full story reported on CNBC, MSNBC, or even FoxNews.
But tucked away in the southwestern corner of Idaho, a $35 million power company prepares to announce the greatest advancement in the history of nuclear power... and with it, instantly receive billions of dollars in federal funding.
By the time their news hits the press, however, early investors could easily pocket as much $32,000.
Click here for the full story.

Secretive startup turns nuclear waste into glass
Bill Gates has said we need “energy miracles.” And he's poured millions into developing a nuclear reactor that can run on depleted uranium for up to 100 years without fueling.
As Gates works on the reactor side, another company is taking on the waste.
Kurion, widely described as a secretive startup, has developed a way to store nuclear waste in glass or ceramics through a process called vitrification.
The technology could bring the United States into the 21st century regarding nuclear waste. (We've been doing it the same way — with the same worries — for over half a century.)
And the company has street cred: CEO John Raymont spent 25 years at a nuclear waste management company that was acquired by EnergySolutions (NYSE: ES) in 2007, and VP of technology is Gaetan Bonhomme, formerly of glass behemoth Saint-Gobain.
The advisory board counts both Patrick Moore — founder of Greenpeace — and former Governor Christine Todd Whitman as members.
In a very real and profitable way, nuclear energy is entering a new era. If Obama's $58 billion in loan guarantees to build new plants didn't give it away, the presence of names like Gates, Whitman, and Moore should.
And while you can't get a piece of Gates' venture, TerraPower, or Kurion just yet, I've found an equally exciting opportunity that everyone can get a piece of — but that's being suppressed by major news outlets.
Nuclear's next big name
Only a few companies are unequivocally associated with nuclear power: Areva and Westinghouse, to name two.
The next company that'll reach this status trades for just $0.65, and only a handful of well-informed investors are paying attention to it.
But the three things I'm about to tell you will soon give it a very high profile; a Bloom-Energy-on-60-Minutes type profile.
First, it's signed on with a well-known nuclear company to manufacture and distribute portable nuclear reactors. They can be taken almost anywhere on a flatbed truck to create large amounts of power in remote or grid isolated locations.
Second, it's signed an exclusive deal with a Chinese nuclear corporation to sell nuclear desalination reactors on a global scale, and has already received interest from dozens of countries.
Third, the company will soon be listed on a major U.S. exchange, like the NASDAQ or NYSE.
But the biggest catalyst of all — the one that could send this stock from penny oblivion to a household name — is the one that no news source is fully reporting.
And that's why I've penned a full investor briefing on the company.
I want you to learn about changes coming to the nuclear industry. I want you to learn about what the media isn't telling the public.
But most importantly, I want you to learn more about this company before the story is blown wide open.
Call it like you see it,
Nick Hodge
Nick

Salt Bridge, Baterai Organik dari Kentang Rebus

Seandainya wilayah pegunungan Dieng belum terlistriki, mungkin masyarakat di sana bisa menerapkan terobosan yang dibuat oleh ilmuwan-ilmuwan di Yissum Research Development Company Ltd., sebuah perusahaan yang berfungsi untuk mengkomersialisasikan teknologi hasil riset Hebrew University di Jerusalem.

Perusahaan tersebut memperkenalkan baterai organik hasil riset para peneliti di Hebrew University yang dibuat dari kentang dan telah mendapatkan perlakuan khusus guna meningkatkan kemampuannya dalam menghubungkan oksidasi dan reduksi dalam sel galvanik atau biasa disebut salt bridge.

Profesor Haim D. Rabinowitch dari Robert H. Smith Faculty of Agriculture, Food and Environment, mahasiswa riset Alex Golberg dari School of Computer Science and Engineering, keduanya dari Hebrew University, bersama dengan Profesor Boris Rubinsky dari University of California di Berkeley, pada dasarnya bermaksud mempelajari proses elektrolitik yang terjadi pada organisme hidup untuk diterapkan pada berbagai aplikasi.

Dalam risetnya mereka mendapati bahwa menggunakan seng dan tembaga yang dipasang pada kentang yang direbus menghasilkan listrik hingga 10 kali lipat dibanding kentang yang tidak direbus. Dari hasil analisa biaya, baterai kentang bisa lima hingga lima puluh kali lebih murah dari baterai komersial 1,5 Volt.

Jika Anda tertarik untuk mencobanya, silakan Anda melakukan sedikit eksperimen dengan berbagai jenis umbi-umbian atau buah-buahan, karena menurut para peneliti tersebut semuanya bisa menghasilkan listrik dengan syarat perlu diberikan perlakuan khusus terlebih dulu agar bisa menghasilkan listrik yang cukup besar.
Sumber : Planet Hijau

18 July 2010

Coconut Oil As Diesel Fuel Substitute


Utilization of Palm Oil as a Source of New Energy Departure from the concerns of the fishermen will have difficulty in accessing remote areas for diesel fuel, Central Library Desrial, M. Eng, Chairman, Department of Agricultural Technique, Bogor Agricultural University (IPB) developed an innovative converter fuel oil into diesel fuel equivalent. Fishermen living in coastal areas, will certainly younger than the solar access of coconut oil. Coconut is grown in many coastal areas can be used for various things, one of which is to transform the flesh into coconut milk and coconut oil, and separates between fat and water. Fat is then to be coconut oil. Meanwhile, to make one liter of coconut oil, it takes twenty coconuts.
In addition to these efforts, coconut oil can also be obtained from copra. Copra is dried coconut flesh and oil contain as much as 34.7 percent. After drying, copra cut into small pieces. Then by pressing the discount will produce palm oil. Coconut oil was precipitated and filtered. Screening results are given alkali potassium hydroxide (KOH) or sodium hydroxide (NaOH) to remove free fatty acids. Then clarified by absorbing the color of charcoal (carbon) is active. Sorting the coconut that will be made when the dried copra. Copra is later to be sold to a dealer to be used as cooking oil Filing coconut Basically, coconut oil has a viscosity of 50-60 degrees centi-Stokes (cSt). But with heating oil at a temperature of 80-90 degrees Celsius, the degree of viscosity of palm oil was going to match the degree of solar is 5 cSt viscosity. Coconut oil is heated by using the coil in the exhaust shaft. After reaching the temperature of 80-90 degrees centigrade, dikabutkan coconut oil to diesel engine combustion chamber. Coconut oil Here are experiencing the same process as diesel fuel, palm oil burned to produce energy of motion machine. To purchase a cooling coil and modify diesel engine exhaust into palm oil converter will cost around Rp. 100 000. Even so, the cost is still cheaper than the cost incurred by the fishermen to buy diesel fuel continuously. In addition to efforts undertaken by IPB lecturer, actually has a lot of work done by the other parties to create new energy sources, including by young people. Various efforts, it is hoped will inspire young children to continue to innovate and develop technology-technology that seeks to preserve the environment and fight climate change.
Adapted from Kompas, May 21, 2010, pp. 14.

Minyak Kelapa Sebagai Pengganti Solar

Pemanfaatan Minyak Kelapa sebagai Sumber Energi Baru
Berangkat dari keprihatinan akan kesulitan nelayan di daerah terpencil untuk mengakses solar, Dr.Ir. Desrial, M.Eng, Ketua Departemen Tekhnik Pertanian Institut Pertanian Bogor (IPB) mengembangkan sebuah inovasi pengubah minyak kelapa menjadi bahaan bakar setara solar.
Nelayan yang tinggal di daerah pantai, tentunya akan lebih muda mengakses minyak kelapa dibandingkan solar. Kelapa yang banyak tumbuh di daerah pantai bisa dimanfaatkan untuk berbagai macam hal, salah satunya adalah mengubah daging minyak kelapa menjadi santan, lalu memisahkan antara lemak dan airnya. Lemak inilah yang kemudian menjadi minyak kelapa. Sedangkan untuk membuat satu liter minyak kelapa, dibutuhkan dua puluh butir kelapa.

Selain usaha ini, minyak kelapa juga bisa didapat dari kopra. Kopra adalah daging kelapa yang dikeringkan dan mengandung minyak sebanyak 34,7 persen. Setelah proses pengeringan, kopra dipotong kecil-kecil. Kemudian dengan pengepresan potongan tersebut akan menghasilkan minyak kelapa. Minyak kelapa ini diendapkan dan disaring. Hasil penyaringan diberi alkali kalium hidroksida (KOH) atau natrium hidroksida (NaOH) untuk menghilangkan asam lemak bebas. Kemudian dijernihkan dengan penyerap warna berupa arang (karbon) aktif.
Pada dasarnya minyak kelapa memiliki derajat kekentalan 50-60 centi-Stokes (cSt). Namun dengan memanaskan minyak kelapa pada suhu 80-90 derajat Celsius, derajat kekentalan minyak kelapa tadi akan menyamai derajat kekentalan solar yaitu 5 cSt. Minyak kelapa dipanaskan dengan menggunakan koil pada batang knalpot. Setelah mencapai suhu 80-90 derajat celcius, minyak kelapa dikabutkan ke ruang pembakaran mesin diesel. Disini minyak kelapa tersebut mengalami proses yang sama seperti solar, minyak kelapa dibakar hingga menghasilkan energi gerak mesin. Untuk membeli koil pendingin dan memodifikasi knalpot mesin diesel menjadi konverter minyak kelapa dibutuhkan biaya sekitar Rp. 100.000. Walaupun begitu, biaya yang dikeluarkan ini masih lebih murah dibanding biaya yang dikeluarkan nelayan untuk membeli bahan bakar solar secara terus menerus.
Selain usaha yang dilakukan oleh dosen IPB ini, sebenarnya telah banyak usaha yang dilakukan oleh pihak-pihak lain untuk menciptakan berbagai sumber energi baru, termasuk oleh anak muda. Berbagai usaha ini, diharapkan akan menginspirasi anak muda untuk terus berinovasi dan mengembangkan tekhnologi-tekhnologi yang berupaya untuk melestarikan lingkungan dan melawan perubahan iklim.

Disadur dari Kompas, 21 Mei 2010, hal. 14.

16 July 2010

Should Ethanol Subsidies be Renewed?

Jeff Coombe

The Ethanol industry has only responded tepidly to the Volumetric Ethanol Excise Tax Credit in the past, so why should it be renewed?

The U.S. ethanol industry is nearing a major deadline. The industry's primary subsidy mechanism, the Volumetric Ethanol Excise Tax Credit (VEETC), is set to expire on December 31, 2010. Federal ethanol subsidies were worth roughly $5 billion in 2009, a figure large enough to create vigorous debate over their renewal. Some call the credits a boondoggle, others a vitally important lifeline for an industry still in its formative years.

Whichever it is, one has to wonder whether we as a country and as taxpayers are getting our money's worth for it. All subsidies are intrinsically positive for the industries they support, of course. But how much of an impact is really felt by the industry, especially as compared to the cost to the taxpayer, is much harder to quantify.

This article will look at the history of subsidies and other government support mechanisms for the ethanol industry, and how they result in increased production, plant construction, and stock pricing. By lining up the dates of landmark legislation with several industry performance metrics, we are able to view the industry response in terms of production and growth, rather than rhetoric. Only pure-play ethanol company stocks are reviewed, represented here by Andersons, Inc. (ANDE), Pacific Ethanol (PEIX), BioFuel Energy Corp. (BIOF), and the now-defunct VeraSun Energy (VSE).

The data below is a limited snapshot, and cannot account for the myriad of variables that affect the ethanol industry. Supply-and-demand market conditions, economic climate, and even public perception impact businesses and investment decisions. While keeping this in mind, it is still striking how little of an effect the VEETC, by far the largest biofuel subsidy, has on the industry as a whole. Almost no metrics responded positively to key dates in the VEETC history, instead seeming to respond much more to direct producer incentives and production / use mandates.

History of Ethanol Incentives

The VEETC was enacted on October 22, 2004 with the American Jobs Creation Act, and set a $0.51/gallon credit for any blender of ethanol into the petroleum gasoline stream. It replaced a convoluted set of subsidies begun in 1979, with a partial federal tax exemption of gasoline blended with at least 10% ethanol (gasohol) by the Energy Tax Act. Fuel blender's tax credits and a pure alcohol tax credit were subsequently added, achieving roughly the same goals, but available to smaller fuel blenders that were unable to receive the excise tax exemption. The VEETC streamlined this system and provided a single mechanism for subsidizing ethanol use. The 2008 Farm Bill reduced the VEETC credit to $0.45/gallon.

One other federal tax credit applied to ethanol, the Small Ethanol Producer Tax Credit. Enacted in 1990, this credit allowed plants producing less than 30 million gallon per year to receive a $0.10/gallon credit for the first 15 million gallons of fuel produced annually. The size of plants that can receive the tax credit was subsequently raised to 60 million gallons per year, though it still only applied to the first 15 million gallons of annual production. The Small Ethanol Producer Tax Credit also expires at the end of 2010. In addition, some 30 states have enacted their own biofuel incentive measures.

The federal government also uses non-monetary support mechanisms to assist the ethanol industry. Foremost amongst those is the Renewable Fuel Standard (RFS), enacted with the August 8, 2005 Energy Policy Act, and amended with the Energy Independence and Security Act, signed into law on December 19, 2007. RFS1 was the 2005 version, and mandated that specific minimum volumes of ethanol be blended with gasoline in the national fuel pool. Starting at 4 billion gallons in 2006, the RFS ramped up the minimum volume of ethanol that had to be blended with gasoline to 7.5 billion gallons by 2012. The industry grew much faster than expected, though, and in 2007 the RFS was amended (RFS2). This raised the minimum volume of corn ethanol blending to 15 billion gallons per year, and adds another 20 billion gallons of cellulosic ethanol, biodiesel, and other advanced renewable fuels by 2022.

Early Years of the Ethanol Industry

Ethanol production as a large-scale industry began in the 1970's. Over 150 ethanol plants, mostly small on-farm distilleries, were built in response to the OPEC oil crisis and fuel prices spikes. However, many plants were going out of business by the end of the decade, and the first ethanol subsidy was installed in 1979 to support the flagging industry. While the volume of production steadily rose in the 1980's and 1990's, the excise taxes failed to stem the drop in plant numbers. By the mid-1980's, there were less than 40 ethanol plants in the U.S. Figure 1 shows numbers of U.S. ethanol plants and production numbers from 1960-2000. Reliable ethanol production volumes were not tracked until 1980.


*Source: RFA 2010 Ethanol Industry Outlook
**Source: BBI International

While the total number of plants barely changed in the 1980's and early 1990's, larger scale plants were being constructed and the ethanol production volume increased steadily over that time period. The Small Ethanol Producer Tax Credit was installed in 1990, and likely contributed to an increase in total production from 900 million gallons in 1990 to 1.4 billion gallons in 1995. How this credit was set up is in itself an indicator of its impact on the ethanol industry. The Small Ethanol Producer Tax Credit is the only credit that is paid directly to the companies that make ethanol. The VEETC and its predecessor excise credits are paid to fuel blenders, which are often petroleum refineries or bulk distributors, and not the ethanol producers themselves. While the majority of the excise credit finds its way back to producers in the form of better prices for their product, the subsidy effectively incentivizes oil companies to use ethanol.

Boom Times

Everyone knows the ethanol industry experienced a boom cycle in the mid-2000's. What is less agreed upon is what set of market forces really caused this boom. Contrary to popular belief, the data shows that the VEETC, enacted in 2004, did not immediately result in a change of ethanol plant construction. Between 2002 and 2005, the number of new plants or plant expansions announced held relatively static in the neighborhood of 15 plants per year. Total production capacity of plants grew slightly during that time. The real growth in the ethanol industry came in 2006 and 2007, which more closely corresponds to the RFS implementation. Figure 2 shows the relative inactivity between 2004 and 2005, and the large increase in construction projects from 2006-2008.

It is important to take into account the lag time between when a project is conceived and construction begins. This lag allows for the requisite capital to be raised, construction firms contracted, and other aspects of the project to be developed to the point that construction can be announced. In the ethanol industry, and especially in the boom years, the project development period is usually on the order of 12-18 months. If the VEETC was a major difference maker in the decision to build an ethanol plant, at least some early adopters would have been able to capitalize in 2005, and would have registered an uptick in construction. As it worked out, though, the bulk of industry growth came 2-3 years later.


Source: Renewable Fuels Association

A measure of a company's health, and the most immediate indicator of positive and negative changes affecting a company, are shown in its stock price. In today's investing world, stock prices respond instantly to the slightest news, and it is here that the indifference towards the VEETC is most apparent.

If financial experts had agreed it was vital for the industry, stock prices should have jumped after signing of the VEETC. On the contrary, Figure 3 shows that there was almost no change in ethanol company stock pricing in 2004 and most of 2005. It was late-2005 and 2006 before the pure-play ethanol company stocks began their meteoric rise, immediately after signing of RFS1. Later, the increase in mandated volumes of ethanol production, through RFS2 in 2007, lines up with minor spikes in all four stock prices. This data indicates that investors were more responsive to RFS legislation than the VEETC. (Stocks are shown as a percentage of their highest point within the time period, in order to show the wide range of share values on one graph.)



The other end of the boom (late 2008 and 2009) saw the bankruptcy of VeraSun, sharp drops in ethanol stocks and almost instant halting of all ethanol plant building, including some projects in mid-construction. All of this occurred while the VEETC was in the middle of its 6-year effective term, and the RFS was being increased to its 36 billion gallon goal.

The reduction of the VEETC in 2008 does correspond with reductions in the numbers of plants constructed and stock values. A change of $0.06/gallon in the credit reduces profit to a 100 million gallon plant by $6 million annually, so this change was definitely felt by producers. By that time, however, corn feedstock prices had hit an all-time high, oil prices had crashed, and a recession was hitting the U.S. economy. These forces impacted the industry much more than changes to the federal incentives packages could help. On the other hand, the fact that the industry is still alive today is probably due in part to those support mechanisms.

Going Forward

Does this show that ethanol companies and the investors who fund plant construction were more interested in the guaranteed market for their product resulting from the RFS, rather than increases in profit from the tax credit? Or are subsidies, while easy to point to, insignificant in the face of the much larger economic forces that really determine the health of the industry (general economic and investment climate, crush spread, etc)?

It is impossible to argue that the VEETC did not help spur investment into the ethanol area, and equally as difficult to argue that it isn't helping the industry through the bad times. It is not a perfect incentive, however. The purpose of the VEETC was to equalize the cost of ethanol with gasoline, but at times it has not been enough to help the producers, and at other times bonus profit on top of an already profitable product. Creating a guaranteed market for ethanol through mandated volumes of use, via RFS1 and RFS2, seems have a much greater effect on the industry at a much lower cost. Mandated use stabilizes the market, and still allows for the most efficient, low-cost producers to rise to the top.

A bill for renewing the VEETC and Small Ethanol Producer Tax Credit has been proposed in the House and Senate. Cattle and dairy groups have raised opposition to the measure, not interested in supporting their competition for corn any longer. Many groups feel the ethanol industry, at least the corn-based subset of the industry, has matured and should not need further subsidization in the form of tax credits.

With the biofuels industry mired in a worse rut than the overall U.S. economy, government efforts to help the industry should not be cut. However, alternative incentive schemes need to be devised that provide more bang for the taxpayer buck. Systems including grants and loan guarantees for the construction of plants using second-generation feedstocks, a blending equalization scheme recently proposed in Biofuels Digest, and a new tax-and-tariff system proposed by researchers at Iowa State University and the USDA are all being discussed. With the current subsidy set to expire, now is the best time to explore better and more effective support schemes for the U.S. biofuels industry.

Jeff Coombe has been in the renewable energy and environmental science field for 7 years, including experience developing ethanol and biodiesel production facilities, project management for end use vehicle fleet conversions to alternative fuels, and environmental protection management. He is an active member of the Colorado Governor’s Biofuels Coalition steering committee, and has presented research findings at conferences including the International Algae Congress (Amsterdam, Netherlands), the Advanced Biofuels Workshop (Portland, Oregon), and the Colorado Renewable Energy Conference (Pueblo, Colorado). Strengths include data acquisition and analysis, emerging feedstock and production technologies, and inter-industry relations. Mr. Coombe is currently seeking a project development position with a company local to the Denver, CO area. Click here to view his resume and biography.

Audacity Portable 1.3.12: 'Version' to carry 'Audacity, one of the best free audio editors


Audio Editors/Recorders





Fully functioning version of Audacity Portable 1.3.12, specifically optimized for operation from USB-stick. The program needs no installation, so that could work directly from the media. Suitable option if you must use an international or business computer. Apart from the USB-device, Audacity Portable 1.3.12 works from CD, Flash-card or MP3-player.


Audacity Portable 1.3.12 e audioredaktor which handles all major audio formats - MP3, Ogg / Vorbis, WAV, MIDI, AIFF. The program can mixing to remove noise, or to change playback speed of a song. Owns and built-in sound recording in real time. You can expand the available effects through extensions (plugins).

Audacity Portable 1.3.12 is a tool that lets you record, edit and manipulate digital audio files in various formats. Portable Audacity only too well you can carry with you on your USB drive.

In addition to creating your own recordings from individual files by adding multiple effects, you can import audio files in WAV, AIFF, AU, MP3, etc.

Audacity Portable 1.3.12 supports basic editing commands (cut, copy, paste, undo), mix songs, and includes a range editor, a spectrogram and a frequency analyzer implemented.

Size: 10.8 MB
Publisher: Visit Website
Release Date: 2010-6-19
OS: Win 9x/ME/2K/NT/XP/Vista
Download Software

“Ununseptium” Unsur Baru Dengan Nomor Atom 117 Telah Diciptakan

Tim peneliti yang merupakan gabungan dari ilmuwan Amerika dan Rusia yang bekerja di Laboratorium “Flerov Laboratory of Nuclear Reaction” di Dubna, 120 Km dari arah utara kota Moscow, telah berhasil menciptakan unsur super berat (unsur dengan nomor atom lebih dari 92) dengan nomor atom 117 yang dihasilkan dari reaksi salah satu isotop kalsium dengan unsur radioaktif berkelium, seperti yang telah dilaporkan dalam “Physical Chemistry Letters” pada April 2010.

DarkWave Studio 3.0.6: Virtual Sound Studio to compose your own music

Audio Editors/Recorders



DarkWave Studio 3.0.6 is a publisher of real-time sound that is organized into several tabs. The main contains a virtual sound studio where they can add modules with the right mouse bot ion.

In addition to supporting VST and ASIO plugins, DarkWave Studio 3.0.6 includes eight modules, such as a MIDI input, a mixer, or a percussion synthesizer. Everyone can connect with virtual wiring dragging the mouse from the links below.

Pattern Tab Editor is a pattern in which you can modify the sound using control messages. DarkWave Studio 3.0.6 also has a multi-track sequencer very easy to use. Finally, the tab HD Recorder will record audio in real time within the project and save it as WAV files.

With a very low resource consumption, a sleek interface and a range of functions than enough, DarkWave Studio 3.0.6 will help you compose music with ease.

Size: 2.43 MB
Publisher: Visit Website
Release Date: 2009-7-15
OS: Win 9x/ME/2K/NT/XP/Vista



Dowlnload Software

14 July 2010

Sifat Koligatif Larutan

Sumber : Chemistry.org

Gambaran umum sifat koligatif
Gambaran umum sifat koligatif
Sifat  koligatif  larutan  adalah  sifat  larutan  yang  tidak tergantung pada macamnya zat terlarut tetapi semata-mata hanya ditentukan oleh banyaknya zat terlarut (konsentrasi zat terlarut).
Apabila suatu pelarut ditambah dengan sedikit zat terlarut (Gambar 6.2), maka akan didapat suatu larutan yang mengalami:
  1. Penurunan tekanan uap jenuh
  2. Kenaikan titik didih
  3. Penurunan titik beku
  4. Tekanan osmosis
Banyaknya partikel dalam larutan ditentukan oleh konsentrasi larutan dan sifat Larutan itu sendiri. Jumlah partikel dalam larutan non elektrolit tidak sama dengan jumlah partikel dalam larutan elektrolit, walaupun konsentrasi keduanya sama. Hal ini dikarenakan larutan elektrolit terurai menjadi ion-ionnya, sedangkan larutan non elektrolit tidak terurai menjadi ion-ion. Dengan demikian sifat koligatif larutan dibedakan atas sifat koligatif larutan non elektrolit dan sifat koligatif larutan elektrolit.

Penurunan Tekanan Uap Jenuh

Pada  setiap  suhu,  zat  cair  selalu  mempunyai  tekanan tertentu. Tekanan ini adalah tekanan uap jenuhnya pada suhu tertentu. Penambahan suatu zat ke dalam zat cair menyebabkan penurunan tekanan uapnya. Hal ini disebabkan karena zat terlarut itu mengurangi bagian atau fraksi dari pelarut, sehingga kecepatan penguapan berkurang.

Gambaran penurunan tekanan uap
Gambaran penurunan tekanan uap
Menurut Roult :
p = po . XB
keterangan:
p     : tekanan uap jenuh larutan
po  : tekanan uap jenuh pelarut murni
XB  : fraksi mol pelarut
Karena XA + XB = 1, maka persamaan di atas dapat diperluas menjadi :
P = Po (1 – XA)
P = Po – Po . XA
Po – P = Po . XA
Sehingga :
ΔP = po . XA
keterangan:
ΔP   : penuruman tekanan uap jenuh pelarut
po    : tekanan uap pelarut murni
XA   : fraksi mol zat terlarut
Contoh :
Hitunglah penurunan tekanan uap jenuh air, bila 45 gram glukosa (Mr = 180) dilarutkan dalam 90 gram air ! Diketahui tekanan uap jenuh air murni pada 20oC adalah 18 mmHg.
rm

Kenaikan Titik Didih

Adanya penurunan tekanan uap jenuh mengakibatkan titik didih larutan lebih tinggi dari titik didih pelarut murni. Untuk larutan non elektrolit kenaikan titik didih dinyatakan dengan:
ΔTb = m . Kb
keterangan:
ΔTb = kenaikan titik didih (oC)
m      = molalitas larutan
Kb = tetapan kenaikan titik didihmolal
rm19
(W menyatakan massa zat terlarut), maka kenaikan titik didih larutan dapat dinayatakan sebagai:
rm210
Apabila pelarutnya air dan tekanan udara 1 atm, maka titik didih larutan dinyatakan sebagai :
Tb = (100 + ΔTb) oC

Penurunan Titik Beku

Untuk penurunan titik beku persamaannya dinyatakan sebagai:
rm37
ΔTf = penurunan titik beku
m     = molalitas larutan
Kf     = tetapan penurunan titik beku molal
W     = massa zat terlarut
Mr   = massa molekul relatif zat terlarut
p      = massa pelarut
Apabila pelarutnya air dan tekanan udara 1 atm, maka titik beku larutannya dinyatakan sebagai:
Tf = (O – ΔTf)oC

Tekanan Osmosis

Tekanan osmosis adalah tekanan yang diberikan pada larutan yang dapat menghentikan perpindahan molekul-molekul pelarut ke dalam larutan melalui membran semi permeabel (proses osmosis) seperti ditunjukkan pada.
Menurut Van’t hoff tekanan osmosis mengikuti hukum gas ideal:
PV = nRT
Karena tekanan osmosis = Π , maka :
rm48
π° = tekanan osmosis (atmosfir)
C   = konsentrasi larutan (M)
R   = tetapan gas universal.  = 0,082 L.atm/mol K
T   = suhu mutlak (K)

Tekanan osmosis
Tekanan osmosis
  • Larutan yang mempunyai tekanan osmosis lebih rendah dari yang lain disebut larutan Hipotonis.
  • Larutan yang mempunyai tekanan lebih tinggi dari yang lain disebut larutan Hipertonis.
  • Larutan yang mempunyai tekanan osmosis sama disebut Isotonis.
Seperti yang telah dijelaskan sebelumnya bahwa larutan elektrolit  di  dalam  pelarutnya  mempunyai  kemampuan  untuk mengion. Hal ini mengakibatkan larutan elektrolit mempunyai jumlah partikel yang lebih banyak daripada larutan non elektrolit pada konsentrasi yang sama.
Contoh :
Larutan 0.5 molal glukosa dibandingkan dengan iarutan 0.5 molal garam dapur.
  • Untuk larutan glukosa dalam air jumlah partikel (konsentrasinya) tetap, yaitu 0.5 molal.
  • Untuk larutan garam dapur: NaCl(aq) → Na+(aq) + Cl-(aq) karena terurai menjadi 2 ion, maka konsentrasi partikelnya menjadi 2 kali semula = 1.0 molal.
Yang menjadi ukuran langsung dari keadaan (kemampuannya) untuk mengion adalah derajat ionisasi. Besarnya derajat ionisasi ini dinyatakan sebagai :
α° = jumlah mol zat yang terionisasi/jumlah mol zat mula-mula
Untuk larutan elektrolit kuat, harga derajat ionisasinya mendekati 1, sedangkan untuk elektrolit lemah, harganya berada di antara 0 dan 1 (0 < α < 1). Atas dasar kemampuan ini, maka larutan elektrolit mempunyai pengembangan di dalam perumusan sifat koligatifnya.
  • Untuk Kenaikan Titik Didih dinyatakan sebagai :
rm54
n menyatakan jumlah ion dari larutan elektrolitnya.
  • Untuk Penurunan Titik Beku dinyatakan sebagai :
rm64
  • Untuk Tekanan Osmosis dinyatakan sebagai :
π°  = C R T [1+ α(n-1)]
Contoh :
Hitunglah kenaikan titik didih dan penurunan titik beku dari larutan5.85 gram garam dapur (Mr = 58.5) dalam 250 gram air ! (untuk air, Kb= 0.52 dan Kf= 1.86)
Jawab :
Larutan garam dapur,
rm73
Catatan:
Jika di dalam soal tidak diberi keterangan mengenai harga derajat ionisasi, tetapi kita mengetahui bahwa larutannya tergolong elektrolit kuat, maka harga derajat ionisasinya dianggap 1.

How to Convert Wastepaper Into Ethanol

Contributor
By an eHow Contributing Writer

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Ethanol may one day provide a practical alternative to gasoline. There are many sources for this fuel, including one that doesn't receive much publicity. Conversion into ethanol can take the "waste" out of wastepaper.

Instructions

Step 1
Add non-grain plant sources, such as scraps of wastepaper (which originate from wood pulp) to remnants of feedstock, grass clippings and weeds. Convert the resulting biomass mixture into cellulosic ethanol. Add the paper to equal amounts of organic materials. You will yield an approximate rate of 340 liters to a ton of the added fiber.

Step 2
Use a wide variety of normally thrown away products such as leftover brewer's, paper towels and other scrap paper to make biofuel alternatives to gasoline. Such is the hopes of Zymetis, an incubator company in Maryland.

Step 3
Generate steam, which results in electricity, with the cooking and alcohol production of this product in a still-like process. Of course, scientists have not revealed the exact "recipe" for cellulosic ethanol.

Step 4
Break down trash products into sugars and eventually alcohol. Use an enzyme, such as Saccharophagus degradans, found by the University of Maryland. This enzyme has been reproduced in labs and used by Zymetis to accomplish this task. At this time, the enzymes are still in the trial stages.

Tips & Warnings


  • The University of Maryland found the newest enzyme in the search for new fuel production (Saccharophagus degradans) in the Chesapeake Bay.


  • Using ethanol is different from using normal gasoline in your vehicle. The gas mileage will not be as much because there is 1/3 less energy per gallon.


13 July 2010

Bim Salabim, Limbah Plastik disulap menjadi Bensin

Pemerintah Daerah Samarinda baru-baru ini meninjau kerjasama dengan perusahaan dari Malaysia untuk mengembangkan pengolahan sampah menjadi Bensin dan Solar (BBM).

Terobosan Pengolahan sampah menjadi BBM ini baru dalam tahap uji kelayakan, belum ada perjanjian yang mengikat. Seandainya uji kelayakan itu cocok maka Pemerintah Daerah Samarinda akan segera membuat perjanjian atau MOU dengan perusahaan asal Malaysia tersebut dan segera mungkin membangun pabrik pengolahan sampah menjadi BBM.

Menurut Kepala Dinas Kebersihan dan Pertamanan Samarinda, Marwansyah, jumlah sampah di Samarinda rata-rata 1.200 meter kubik perhari. Sampah itu terdiri dari sampah basah dan kering, keduanya akan dipisahkan karena yang akan dibuat Bensin adalah sampah plastik. Dikutip dari Vivanews

Sedangkan untuk pembuatan BBM dari sampah plastik itu adalah dengan cara mengolah dan memanaskan plastik hingga suhu 450 derajat celcius dengan alat Recycle Oil Machine.

BBM yang dihasilkan dari pengolahan sampah plastik ini terdiri dari 60% Solar dan 40% Bensin. Namun untuk Bensin kualitasnya belum bagus sedangkan Solar kualitasnya lebih bagus dari solar dari bahan lain. Bahkan di Korea Solar ini sudah digunakan untuk kendaraan.

Pengolahan Sampah Plastik menjadi BBM ini sangat membantu permasalahan sampah yang kini semakin hari semakin banyak. Semoga Kota Samarinda bisa menjadi contoh bagi kota-kota lain yang katanya sering mengeluhkan sampah yang semakin banyak.

11 July 2010

Winamp 5,581 Lite Build 2985

Winamp 5,581 Lite Build 2985 adalah player yang sangat bagus untuk pemutaran file multimedia. Program ini memiliki fungsi ganda - media library untuk mengatur lagu, playlist pilihan, kemampuan mengubah tampilan, maupunmodul tambahan. Yang jelas akan membuat kita mendengarkan musik menjadi lebih menyenangkan.

Winamp 5,581 Lite Build 2985 mendukung banyak format file. Selain format audio seperti - mp3, wav, au, wma, midi, dll juga mendukung format video - MPEG, AVI, ASF, WMV dan lain-lain. Memungkinkan Anda untuk mengakses musik anda melalui browser web. Ada banyak plugin di dalamnya.

Winamp 5,581 Lite Build 2985 merupakan solusi yang baik untuk melihat, menyortir, dengan kapasitas besar dan beragam koleksi audio dan video.

Selama bertahun-tahun, dan Winamp 5,581 Lite Build 2985 versi media player, salah satu yang paling populer di dunia, telah berubah dari pemutar musik yang sederhana ke sistem pemutaran multimedia penuh. Semua perbaikan ini telah mendapatkan kemampuan yang lebih besar, sehingga akan menggunakan lebih banyak pada hard drive Anda.

Winamp 5,581 Lite Build 2985 jauh lebih ringan.
Ukuran: 6,74 MB

10 July 2010

Pipe Flow Expert - Get 15% Off plus an EXTRA 2nd license (worth £1295)



Visit www.pipeflow.co.uk today and enter the promotion code 257241 before clicking on 'Checkout' to get 15% off, and get an EXTRA second license when you also buy Annual Support!

This opportunity expires on July 25th 2010 so take action now!

Don't miss this one-time chance to save on Pipe Flow Expert licensing, plus
GET AN EXTRA SECOND LICENSE worth £1295 (approx $2000 USD)
when you buy PipeFlow Expert and Annual Support together.

Professional 'Fluid Flow' engineers choose Pipe Flow Expert because they want a program that will provide instant and accurate results, is easy-to-use and which they will be able to use immediately.


Pipe Flow Expert 2010 v5.12 Major Update

This is the new 2010 release of our premier application for designing and analyzing pipe systems. Easily visualize and calculate the flows and pressures at all points in your pipe system.




Version 5.12 is a major release that includes the following updates:

    a) Amazing PDF Report Generation, with customized data selections
    b) Support for Cv and Kv Flow Coefficients modeling
    c) Enlarged Drawing Area for large scale systems
    d) Enhanced Pipe Database with 15 new schedules & 180 new rows of data
    e) Larger Fluid Database with over 400 fluid data points
    f) Increased ease-of-use and productivity enhancements

General features also include:
  • Isometric 3D Drawing capabilities with smart labels and 3D symbols
  • An Enhanced Calculation Engine that will solve complex piping designs
  • An Intuitive User Interface that is best-in-class & easy to use
  • Modeling of up to 1000 nodes and 1000 pipes.
  • A Fluid Database with common liquid and gas data
  • A Pipe Database with common pipe materials and sizes
  • A Fittings Database with common valve and fitting data
Try Pipe Flow Expert 2010
Click on the following download link and then
Choose 'Run' to automatically install the program.

Download Pipe Flow Expert 2010 Version 5.12
Get a second license code (at no extra charge) when you purchase PipeFlow Expert plus Annual Support on or before July 25th 2010.

Simply Buy your first PipeFlow Expert license (Single User via download) and Buy Annual Support and then email us at info@pipeflow.co.uk with your purchase token and we will email back a second license code (worth £1295).

Note: Purchases of PipeFlow Expert on USB are still eligible for the discount however the USB version already comes with a 2nd license for a downloaded copy, so we do not provide a further download license in this case but you will still save money.

This opportunity is limited to selected individuals & organizations, and is
available until 25th July 2010.

All purchases come with a 30 day refund guarantee - we only want happy customers and we're confident that our Pipe Flow Expert program provides exceptional value - see what our existing users think: Genuine Testimonials


Kind Regards

David Gardiner
PipeFlow.co.uk

TimeChimes Automatic School Bell and other Sound Playing System

Play sounds at pre-scheduled times

Download the 
free TimeChimes Automatic School Bell and other Sound Playing System

Download TimeChimes Purchase TimeChimes
TimeChimes is a software application that will play a sound or sounds at pre-scheduled times of day on each day of the week. Typically, TimeChimes can used to play school or church bells or shift-time sounds in factories or businesses. It can also be used for other applications where you want a sound to play at preset times. You don't need to purchase and it only takes a couple of minutes to complete the process (click here to install).




More Screenshots >>>
 
Features
  • Plays bells, chimes or any other sounds at preset times.
  • Schedule times for automatic play on each day of the week (or weeks on a dual week cycle).
  • The current day's play times can easily be changed if required.
  • Includes 9 pre-recorded bell type sounds.
  • Other sounds can be loaded as wav and mp3 formats.
  • Automatically runs on startup or runs as a service (before logon)
  • Easy to use for day to day operation.
System Requirements
  • Works on Windows XP 2000/2003/Vista/2008 and Windows 7
  • For earlier Windows versions (98, ME) please click here
  • A sound card.
Note: TimeChimes does not need a dedicated computer. TimeChimes can run in the background on a computer which you can continue to use for other tasks. TimeChimes will run on the Tray of the Task Bar and play automatically even if you are doing something else.
Download TimeChimes
The software can be downloaded by clicking on the following link. Once downloading is complete, run the file tcsetup.exe. The setup file will automatically install the software. The complete manual is included. Once you have run the setup file, select the Help menu item for a guide to using TimeChimes.
More Information...