Rapid Hydropyrolysis of sub-Bituminous and Bituminous Coals

摘要

Two sub-bituminous coals, New Mexico and Montana Rosebud, and two bituminous coals, Illinois No. 6 and Kentucky No. 9, have been hydrogenated in a highly instrumented 1 in. I.D. entrained downflow tubular reactor system. Coal particles residence times varied from approximately 0.5 second to greater than 6 seconds. The New Mexico coal yielded, based on carbon converted, approximately 20% liquid hydrocarbon products at 2000 to 2500 psi and 10% at 1000 psi. The maximum gaseous hydrocarbon yield was 85% at 2500 psi and 900 exp 0 C. The Montana Rosebud coal, studied at less than 2 seconds residence times and 1000 psi produced 12% liquid and 23% gaseous products. The caking bituminous coals, all run at no greater than 1000 psi, were used with diluents of limestone or sand to prevent agglomeration. The liquid yield from the Illinois No. 6 coal was 8 to 13% and the gaseous yield 34 to 43% when using limestone and 27 to 31% when using sand. (ERA citation 07:003132)