COPRODUCTION: A GREEN COAL TECHNOLOGY?

摘要

This paper has shown that coproduction could be considered a "green" coal technology because of three very important characteristics: * It produces electric power from clean synthesis gas using advanced combined cycle technology at high efficiency. Sulfur is recovered as elemental sulfur rather than being emitted as SOx, NOx is low, and the residual coal ash is transformed into a non-leachable slag. * It produces ultra clean transportation fuels that contain zero sulfur, zero aromatics, and have high cetane number. They have been shown to produce significantly less exhaust emissions when used in diesel vehicles than petroleum fuels. * The configuration of coproduction produces a concentrated stream of almost pure carbon dioxide that could readily be sequestered once this technology has been developed. From the aspect of economics, as natural gas prices increase beyond