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Coal is a readily combustible black or brownish-black sedimentary rock normally occurring in rock strata in layers or veins called coal beds. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly sulphur, hydrogen, oxygen and nitrogen. Coal begins as layers of plant matter accumulate at the bottom of a body of water. For the process to continue the plant matter must be protected from biodegradation and oxidization, usually by mud or acidic water. The wide shallow seas of the Carboniferous period provided such conditions. This trapped atmospheric carbon in the ground in immense peat bogs that eventually were covered over and deeply buried by sediments under which they metamorphosed into coal. Over time, the chemical and physical properties of the plant remains (believed to mainly have been fern-like species antedating more modern plant and tree species) were changed by geological action to create a solid material. Coal, a fossil fuel, is the largest source of energy for the generation of electricity worldwide, as well as one of the largest worldwide anthropogenic sources of carbon dioxide emissions. Gross carbon dioxide emissions from coal usage are slightly more than those from petroleum and about double the amount from natural gas. Coal is extracted from the ground by mining, either underground or in open pits. From Wikipedia under the
GNU Free Documentation License What is the difference between oil and coal? Q. They are both hydrocarbons correct? So is oil the liquid version of coal? If so, how does it stay liquid compared to the rock shape of coal? Asked by Heather H - Wed May 12 00:05:39 2010 - - 3 Answers - 0 Comments A. Coal is a solid fossil fuel created by the decomposition of enormous amounts of plant material that were subjected to the correct mechanisms of burial, compaction, heat, and pressure that ended with coal. Oil, on the other hand was created as millions and millions of tiny oceanic microorganisms collected in massive piles. Like coal, they were buried over, compacted, heated, and pressed, but this time into viscous liquid petroleum (and natural gas where appropriate). They are both hydrocarbon compounds, but their chemistries are quite different. They are not the solid and liquid phase of the same thing. Answered by Earth Man - Wed May 12 00:10:52 2010 What is the energy transfer/transformation from burning coal to using a radio? Q. What I have to do is describe the energy transfers/transformations from burning coal in a power station to using a radio. And I have to use the word efficiency... I don't need the answer necessarily but website links would be so helpful Asked by Random McGinger - Sun Apr 27 03:58:52 2008 - - 1 Answers - 0 Comments A. Coal is a hydrocarbon which contains potential energy in the form of chemical energy. As it burns the energy in the heat will heat up water. Molecules in the water begin moving faster as they heat until the water reaches 100* Celsius (centigrade)/ 212* Fahrenheit. At this point steam is created as water of liquid form changes to a vapor. The expanding vapor will drive turbines, which in turn drive a generator which produces the electric current. Electricity travels through cables till it arrives at your house, to power the radio. At each step the original energy the coal is lost through friction, heat loss, mechanical losses, and electrical losses though miles of cable. The original energy in the coal could be reduced by 75% or so before… [cont.] Answered by Huh? - Sun Apr 27 04:33:17 2008 How much did coal miner make in the 1930s?
Q. I need to know how much a coal miner made in the 1930s. Asked by A.... - Sun Jan 10 23:15:26 2010 - - 1 Answers - 0 Comments A. 1.00 to 2.00 dollars a day Answered by Pipingbob - Mon Jan 11 10:24:57 2010 From Yahoo Answer Search: "Coal" See also:
 ajc.com Mon, 26 Jul 2010 20:35:11 GMT+00:00 plant permits improper Atlanta Journal Constitution State water permits at a planned Middle Georgia coal plant don't meet the requirements of state and federal law, an administrative judge ... Judge Rejects Permits For Coal Plant wabe judge Rejects Coal Plant Permits gpb judge rejects two permits for coal plant Atlanta Business Chronicle Power-Gen Worldwide - Macon Telegraph  seekingalpha.com Wed, 21 Jul 2010 11:51:10 GMT+00:00 Intensive Economy Reaches New Milestone Seeking Alpha (blog) One interesting aspect of China's energy picture is the fact that coal accounts for two-thirds of supply compared to 57 percent of the total in 2000. ... Beijing Intensifies Carbon Capture and Sequestration Work With US New York Times Why China Has To Dominate Green Tech Forbes (blog) Bixby Energy to announce coal -to-gas deals with China Minneapolis Star Tribune BusinessWeek - AFP - The Durango Herald  billingsgazette.com Mon, 26 Jul 2010 06:01:51 GMT+00:00 mine troubling Billings Gazette The Gazette welcomes letters to the editor. Letters are subject to editing and must be fewer than 250 words to be considered for publication. ... From Google News Search: "Coal"  nataliechillington.files.wordpress.com 336px x 500px | 85.00kB [source page] of toxicity that can be very detrimental to people and the environment They are green house gases Call it whatever you want to call it it still looks like this when it burns My guess is those aren t rain clouds Are you trying to suggest that this power plant has very little negative effects on our health and our enviroment From Yahoo Image Search: "Coal"  chicagobusiness.com unknown Mon, 26 Jul 2010 19:59:00 GM (Crain's) The US Department of Energy awarded $417 million in federal tax credits to a proposed "clean . coal. " power plant in Downstate Taylorville after it promised to reduce greenhouse gases more than originally planned.  physiocrat.blogspot.com Physiocrat ue, 27 Jul 2010 07:02:00 GM A huge . coal. export terminal is spread out along the river frontage on the approach to Riga. The . coal. is delivered in enormously long trains composed of trucks with the word hobotpahc (NOVOTRANS) in giant letters on the side. ...  naombakazi.blogspot.com Yona Fares Maro Mon, 26 Jul 2010 18:10:00 GM Optimum . Coal. is a broad-based South African . coal. mining and exploration group with a strong vision to be a leading player in the export and domestic . coal. industries. Our flagship operation is Optimum Colliery in Mpumalanga, ... From Google Blog Search: "Coal" |
China Coal Information Network
Institute for Solid Fuels Technology and Applications (ISFTA)
International Energy Agency Coal Research - The Clean Coal Centre
