Abstract
Technical feature:The Ralph M. Parsons Co. and the U.S. Dept. of Energy are developing preliminary designs and economic evaluations of commercial coal conversion facilities. The commercial designs already completed include a Fischer-Tropsch facility producing liquid hydrocarbons plus substitute natural gas by indirect coal liquefaction. More specifically, this facility will produce carbon dioxide-carbon monoxide-hydrogen syngas, which will then be purified and converted into hydrocarbon liquids. Part of the unreacted syngas will be upgraded to substitute natural gas by methanation. The Parsons design incorporates advanced technology and satisfies strict environmental requirements. Major pollution abatement efforts include: desulfurization of gases generated during coal conversion; removal of acid gases; and a combination of recycling and discharge of aqueous effluents. Of particular concern is the possible formation of carcinogenic compounds in coal tar. (2 diagrams, 1 drawing, 2 tables)
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