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A sub-bituminous coal was pyrolyzed in hydrogen in a pressurized powder-particle fluidized bed. The coal powder was continuously fed into the bed, in which catalyst particles were fluidized. The effects of CoMo/Al 2 O 3 and several types of zeolite catalysts on the product yields were examined. In the presence of catalysts, a high yield of hydrocarbon liquid was obtained. The main...
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