Process Development Studies in Coal Gasification. Volume I. Single Stage Catalytic Hydrogenation of Coal to High-Btu Gas. Final Report, August 1, 1979-November 30, 1983

摘要

The concept of single stage gasification of coal to high-Btu gas has been successfully demonstrated, both in the batch autoclave and continuous flow systems. High-volatile bituminous coals, a Wyoming subbituminous coal and Texas lignite have all performed well and produced high hydrocarbon gas yields at temperatures in the range 440 and 500 exp 0 C and pressures in the range 1500 to 2000 psia. Gas compositions have been varied from predominantly methane to predominantly C sub 2 and C sub 3 hydrocarbons achieved by varying the reaction parameters and catalysts. Reaction times of the order of 30 minutes were utilized in the batch work, while times of the order of two to six minutes are indicated for continuous flow reactor operation. Yields of C sub 2 - C sub 4 hydrocarbons ranging from 47 wt % of the dmmf coal for a bituminous coal to 75% for sub-bituminous coal to 78% for lignite were considered to be very interesting for a single stage coal conversion under mild conditions. A mechanism which explains these conversions in terms of rather well-known chemistry is set forth. 57 refs., 30 figs., 34 tabs. (ERA citation 10:033125)