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The first German gas plant was built in Hannover in 1825 and by 1870 there were 340 gas plants in Germany making town gas from coal, wood, peat and other materials. Working conditions in the Gas Light and Coke Company's Horseferry Road Works, London, in the 1830s were described by a French visitor, Flora Tristan, in her Promenades Dans Londres:
The oldest type, introduced in 1798 by Murdoch, et al.; when the term "manufactured gas" or "town gas" is used without qualifiers, it generally refers to coal gas. Substantially greater illuminant yield with use of special "cannel coal", which may be modern oil shale, richer in hydrocarbons than most regular gas coal (bituminous coal). Wood gas
Gas Works Park, Seattle, preserves most of the equipment for making coal gas. This is the only such plant surviving in the United States. This is the only such plant surviving in the United States. Manufactured gas can be made by two processes: carbonization or gasification .
Raw coke. Coke is a grey, hard, and porous coal-based fuel with a high carbon content. It is made by heating coal or petroleum in the absence of air. Coke is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges.
Although solar and wind based power make the big headlines, the real shift taking place today is natural gas encroaching on coal's territory in the U.S. power grid. That's a long-term trend that ...
Coal gasification is a process whereby a hydrocarbon feedstock (coal) is converted into gaseous components by applying heat under pressure in the presence of steam. Rather than burning, most of the carbon-containing feedstock is broken apart by chemical reactions that produce "syngas."
Underground coal gasification converts coal to gas while still in the coal seam (in-situ). Gas is produced and extracted through wells drilled into the unmined coal seam. Injection wells are used to supply the oxidants (air, oxygen) and steam to ignite and fuel the underground combustion process. Separate production wells are used to bring the ...
In the first stage, coal is converted into syngas (a purified mixture of CO and H 2 gas). In the second stage, the syngas is converted into light hydrocarbons using one of three main processes: Fischer–Tropsch synthesis, methanol synthesis with subsequent conversion to gasoline or petrochemicals , and methanation .
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