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Clean coal Summary Clean coal particles are carried to the top of the jig by this motion, while heavier refuse particles sink to the bottom. The clean coal particles remain in the center of the air column and are drawn off at the top of the cylinder. Clean coal is the name attributed to coal chemically washed of minerals and impurities, sometimes gasified, burned and the resulting flue gases treated with steam, with the purpose of almost completely eradicating sulphur dioxide and reburned so as to make the carbon dioxide in the flue gas economically recoverable. www.bookrags.com /Clean_coal   (1436 words)

Clean coal - Wikipedia, the free encyclopedia Clean coal is the name attributed to coal chemically washed of minerals and impurities, sometimes gasified, burned and the resulting flue gases treated with steam and reburned so as to make the carbon dioxide in the flue gas economically recoverable. The primary example of clean coal is the proposed U.S. FutureGen plant - a zero-emissions coal-fired power plant. It is also widely believed that some process similar to the natural gas fuel cell or microbial fuel cell (charged from biomass or sewage) may be practical using coal as fuel. en.wikipedia.org /wiki/Clean_coal   (168 words)

EPA - Clean Energy - Electricity from Coal Coal is a fossil fuel formed from the decomposition of organic materials that have been subjected to geologic heat and pressure over millions of years. The coal is often cleaned or washed at the coal mine to remove impurities before it is transported to the power plant—usually by train, barge, or truck. Coal mining can also contaminate bodies of water with heavy metals when the water used to clean the coal is discharged back into the environment. www.epa.gov /cleanenergy/coal.htm   (694 words)

Clean Coal Technologies   (Site not responding. Last check: 2007-08-17) Clean coal technologies allow coal to be burned more efficiently, with reduced emissions of sulfur and nitrogen oxides, while providing distinct advantages over conventional coal utilization systems. The conventional procedure for burning coal is to use pulverized fuel combustors, using the steam raised to drive turbogenerators. Clean coal technologies can be grouped in four categories, the first three of which refer to the stages in the combustion process where installation can occur (the fourth bypassing the combustion process altogether): www.ita.doc.gov /td/energy/clncoal.htm   (672 words)

Australian Coal Association Clean coal technologies are a family of new technological innovations that are environmentally superior to the technologies in common use today. Clean coal technologies can be new pollution control devices - like advanced scrubbers - that clean pollutants from flue gases before they exit a plant's smokestack. Coal is added to the bed and the continuous mixing encourages complete combustion and a lower temperature than that of PF combustion. www.australiancoal.com.au /cleantech.htm   (1187 words)

DOE - Fossil Energy: Clean Coal Technology The Clean Coal Technology Program began in 1985 when the United States and Canada decided that something had to be done about the "acid rain" that was believed to be damaging rivers, lakes, forests, and buildings in both countries. For some coals found in Wyoming, Montana and other western states (as well as some places in the East), the sulfur can be only 1/100ths (or less than 1 percent) of the weight of the coal. Although coal is primarily a mixture of carbon (fl) and hydrogen (red) atoms, sulfur atoms (yellow) are also trapped in coal, primarily in two forms. www.fe.doe.gov /education/energylessons/coal/coal_cct2.html   (746 words)

Green Scissors "Clean Coal" Programs So-called "clean coal" projects waste millions of taxpayer dollars each year on duplicative research that the coal industry should conduct with private sector funding or that has already been done. The operators of the Healy Clean Coal project, are pushing for federal loans to retrofit the current clean coal plant with traditional technologies. Burning coal is responsible for about 60 percent of soot-creating sulfur dioxide emissions in the United States and is also a major source of smog-forming nitrogen oxide pollution and mercury contamination. www.greenscissors.org /energy/cleancoal.htm   (582 words)

Clean Coal in the United Kingdom Coal burning is creating serious air pollution around the world, and with coal production rising with no end in sight, not just carbon dioxide but more immediate and deadly pollutants should be cleaned out of the burning process. Clean Coal Technologies (CCT) is defined as technologies designed to enhance both the efficiency and the environmental acceptability of coal extraction, preparation and use. Coal is an important segment of the energy mix in the UK: As recently as 1990 coal fired generation provided over 75% of the countryﾒs electricity. www.ecoworld.com /Home/Articles2.cfm?TID=379   (2135 words)

Unmasking the truth behind "clean coal" Furthermore, clean coal research risks diverting investment away from renewable energy, which is available to reduce greenhouse gas emissions now. Many of the ‘clean coal’ technologies being promoted by the coal industry are still in the development stage and will take hundreds of millions, if not billions, of dollars and many more years before they are commercially available. Coal is the dirtiest fuel there is and belongs in the past. www.greenpeace.org /seasia/en/asia-energy-revolution/dirty-energy/clean-coal-myth   (724 words)

BBC NEWS | Science/Nature | Clean coal technology: How it works One technique involves feeding the coal into barrels containing a fluid that has a density which causes the coal to float, while unwanted material sinks and is removed from the fuel mix. Coal gasification plants are favoured by some because they are flexible and have high levels of efficiency. After being cleaned, it is burned in a gas turbine to generate electricity and to produce steam to power a steam turbine. news.bbc.co.uk /2/hi/science/nature/4468076.stm   (543 words)

Clean Coal Technology To convert coal to synthetic fuels, a process has been developed that requires the coal to be in contact with a hydrogen environment at high temperatures and pressures. Coal gasification offers one of the most versatile and cleanest ways to convert the energy content of coal into electricity, hydrogen, and other energy forms. Coal Gasification, in fact, may be one of the best ways to produce clean-burning hydrogen for tomorrow's automobiles and power-generating fuel cells. www.cogeneration.net /CleanCoalTechnology.htm   (5178 words)

CLEAN COAL   (Site not responding. Last check: 2007-08-17) Clean Coal Technologies (CCTs for short) are processes of refining coal to create cleaner, more efficient energy. The Clean Coal Technology Program (CCT Program), a model of government and industry cooperation, advances the Department of Energy's (DOE) mission to foster a secure and reliable energy system that is environmentally and economically sustainable. Coal liquefaction is a technology that takes a solid such as coal and breaks it down to form a fuel oil. www.usgaspower.com /id10.html   (3192 words)

BBC NEWS | Science/Nature | How coal is cleaning up its act Although coal is often portrayed by environmental groups as a lingering legacy of the age of steam, energy analysts say it would be premature to consign this fossil fuel to the history books. John Topper, managing director of the agency's Clean Coal Centre, says the growth in demand is being driven by emerging economies. Clean coal technology (CCT) has entered policy parlance as an umbrella term for all the various strands of research and development to improve the environmental performance of coal-fired plants. news.bbc.co.uk /1/hi/sci/tech/4466040.stm   (1197 words)

Clean Coal The first pioneering coal gasification electric power plants are now operating commercially in the United States and in other nations, and many experts predict that coal gasification will be at the heart of the future generations of clean coal technology plants for several decades into the future. Although coal is primarily a mixture of carbon (fl) and hydrogen (red) atoms, sulfur atoms (yellow) are also trapped in coal, primarily in two forms. Coal gasification could be one of the most promising ways to use coal in the future to generate electricity and other valuable products. www.cogeneration.net /Clean_Coal.htm   (4135 words)

C&EN: COVERSTORY - GETTING TO 'CLEAN COAL' In fact, because coal is easy to find, easy to burn, and available nearly everywhere, any plan to address the future of energy in the U.S. or the world has to begin with coal. This is a big change for coal plants, where even clean ones produce a lake-sized impoundment of sulfuric slurry by pulling sulfur compounds from the stack flue gas. AEP is the nation's largest utility and biggest coal burner, and it depends on coal to generate about 70% of its electricity. pubs.acs.org /cen/coverstory/8208/8208coal.html   (3415 words)

Clean coal initiative gets heat from pollution foes - Saturday, 09/06/03   (Site not responding. Last check: 2007-08-17) Energy bills that the House and the Senate passed before their August recess contain $2 billion spread out over 10 years for the so-called clean coal power initiative, which would research high-tech ways to reduce pollution when electricity is generated from coal. The clean coal provisions are expected to sail through with bipartisan support, according to the program’s advocates and some critics. Coal is the cheapest and most plentiful source of fuel in this country. www.tennessean.com /business/archives/03/09/38868918.shtml?Element_ID=38868918   (735 words)

"Clean Coal" Technologies New "clean coal" technologies are addressing this problem so that the world's enormous resources of coal can be utilised for future generations without contributing to global warming. So-called "clean coal" technologies are a variety of evolving responses to late 20th century environmental concerns, including that of global warming due to carbon dioxide releases to the atmosphere. The clean coal technology field is moving very rapidly in the direction of coal gasification with a second stage so as to produce a concentrated and pressurised carbon dioxide stream followed by its separation and geological storage. www.uic.com.au /nip83.htm   (2414 words)

IEA Clean Coal Centre : Clean coal technologies Clean Coal Technologies (CCTs) are those which facilitate the use of coal in an environmentally satisfactory and economically viable way. A basic approach to the cleaner use of coal is to reduce emissions by reducing the formation of pollutants such as NOx and/or cleaning the flue gases after combustion. A parallel approach is to develop more thermally efficient systems so that less coal is used to generate the same amount of power, together with improved techniques for flue gas cleaning, for effluent treatment and for residues use or disposal. www.iea-coal.org.uk /content/default.asp?PageId=62   (578 words)

KING COAL COMES CLEAN Polk is the poster child for "clean coal," a blueprint for U.S. freedom from foreign oil and an example of how to take advantage of the fact that the United States sits on a 250-year coal supply. The trick is to turn the coal into a gas, and clean the gas before it is burned to produce electricity. This test plant is intended to generate 275 megawatts of power with almost no pollution, while creating clean hydrogen fuel and capturing and burying CO Congress has been reluctant to commit major funding, however, and industry partners are withholding their share of costs until the government ponies up. www.nj.com /business/energy/ledger/index.ssf?/business/ledger/stories/0306kingcoal.html   (1952 words)

PPI: Clean Coal Some environmentalists insist "there is no such thing as 'clean' coal" and that massive, rapid conversion to renewable energy is the only proper course. Coal continued to be and remains one of the mainstays of electric power. Coal gasification even emerged as a bone of contention in the waning days of this year's presidential election campaign. www.ppionline.org /ppi_ci.cfm?knlgAreaID=116&subsecid=900039&contentid=253047   (1858 words)

Clean Coal More than half of the nation's electricity is generated by burning coal, and Pennsylvania has enough coal reserves to power the state for roughly 350 years. Instead of mining for coal, it will burn previously mined, but unused material known as "waste coal," which is plentiful in the western part of the state. Benedict says there is easily enough coal within fifty miles of the plant to provide fuel for fifteen years, at the same time reducing the number of waste coal piles in the area. www.greenworks.tv /radio/todaystory/20020205.htm   (616 words)

Dirty_Coal_Fact_Sheet "Clean coal" refers to a variety of technologies that in theory are supposed to allow coal to be burned while producing little pollution. Coal is America's largest energy source, generating 52 percent of the nation's electricity. There are 24 senators who have cosponsored an industry-backed bill to spend $1 billion over 10 years for research on "clean coal" and up to $6 billion in tax breaks for utilities to upgrade plants or build new ones using the technology. www.blackmesais.org /clean_coals_dirty_facts.html   (817 words)

Directory:Clean Coal - PESWiki Clean Energy Systems (http://www.cleanenergysystems.com/) - Steam generator built on rocket principles economically eliminates pollutants via the use of clean fuels from natural gas, petroleum, coal, or biomass and a pure oxygen oxidizer. Experiments Examine Hydrogen-Production Benefits of Clean Coal Burning (http://www.newswise.com/articles/view/519372/?sc=dwhp) - Experiments are underway at Sandia to optimize the combustion of coal to produce the most energy and the least possible pollution, figuring in the possible benefits of sequestering carbon dioxide and generating both electricity and hydrogen in coal-fired power plants. Ultra-clean coal to power a greener future (http://www.physorg.com/news4098.html) - Engineers in Nottingham are developing ultra-clean coal that could make power generation 50% more efficient and reduce carbon dioxide emissions by a third. peswiki.com /index.php/Directory:Clean_Coal   (993 words)

DOE - Fossil Energy: DOE's Clean Coal Technology Program   (Site not responding. Last check: 2007-08-17) With coal likely to remain one of the nation's lowest-cost electric power sources for the foreseeable future, President Bush has pledged a new commitment to even more advanced clean coal technologies. Building on the successes of the original program, the new clean coal initiative encompasses a broad spectrum of research and large-scale projects that target today's most pressing environmental challenges. The Clean Coal Power Initiative, is providing government co-financing for new coal technologies that can help utilities meet the President's Clear Skies Initiative to cut sulfur, nitrogen and mercury pollutants from power plants by nearly 70 percent by the year 2018. www.fossil.energy.gov /programs/powersystems/cleancoal   (556 words)

The Seattle Times: Search Results Opponents argue coal never will be as clean as natural gas or renewable energy sources such as solar or wind power. Coal is the nation's leading source of electricity. Despite tougher clean-air standards, emissions from coal-fired power plants still include high levels of nitrogen oxide, a key component of smog; sulfur dioxide, which mixes with nitrogen oxide and airborne moisture to form acid rain; carbon dioxide, which some blame for global warming; and mercury, which is poisonous to animals and humans. archives.seattletimes.nwsource.com /cgi-bin/texis/web/vortex/display?slug=cleancoal04&date=20010304   (750 words)

NRDC: OnEarth Magazine, Fall 2005 - How to Clean Coal Coal, as the petroleum geologist Kenneth Deffeyes writes in his recent book Beyond Oil, "is the best of fuels; it is the worst of fuels." It is best because it's the most plentiful and least expensive U.S. domestic energy source. Coal fuels 90 percent of China's electricity demand. Developing systems with which these countries can continue to utilize their coal, but in a way that does not increase carbon emissions, is a huge priority. www.nrdc.org /onearth/05fal/coal1.asp   (1227 words)

AlterNet: Bush's "Clean Coal" Boondoggle Promising a clean energy future for Americans, Bush shelves solar, wind, conservation, and other clean sources of power, in favor of coal. Coal, of course, is about the filthiest fuel we have, but George is putting his money (actually our money) behind an oxymoron called "clean coal technology.' Coal is to clean energy what a Twinkie is to health food. www.alternet.org /columnists/story/11363   (482 words)

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