Abstract
ABSTRACT Results of a study conducted to convert coal to C2-C4 hydrocarbons in a two-stage reactor system are presented. Coal was converted to liquids at 440° C in a stirred batch autoclave using tetralin as the hydrogen donor solvent. The liquids produced were separated from the unreacted coal and ash by filtration. The liquids were then fed into a second stage fixed bed reactor containing sulfided Ni-M0/AI2O3 and Si02-AbO;5 catalyst. The liquids were hydrocracked on the dual-functional catalyst giving high yields of C2-C4 hydrocarbons. The pressure was 1800 psig and the temperatures were in the range of 425 to 500° C. Reaction mechanisms of conversion of coal derived liquids to C2-C4 hydrocarbons are presented. The kinetic parameters of the conversion of coal liquids to gases were determined. The activation energy was determined to be 23.9 Kcal/mol Cracking reactions involving C-C bonds appear to be rate-controlling.
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