화학공학소재연구정보센터
Catalysis Today, Vol.39, No.1-2, 127-136, 1997
Hydropyrolysis of coal in a pressurized powder-particle fluidized bed using several catalysts
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/Al2O3 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 components were light aromatic hydrocarbons such as BTX and naphthalene. The product yields strongly depended on the gas atmosphere, catalyst type, pyrolysis temperature and pyrolysis pressure. Maximum yields of light aromatic hydrocarbons, 10.9 wt% (8.1 wt% of BTX and 2.8 wt% of naphthalene and cresol) were achieved using MS-13X catalyst at the pyrolysis conditions of 730 degrees C and 1.0 MPa of hydrogen. The methane yield of 52 wt% was obtained with CoMo/Al2O3 catalyst at 730 degrees C. The char produced in this process showed large reactivity for CO2 gasification.