A PULSED MICROREACTOR STUDY OF CATALYST USED IN THE SYNTHOIL PROCESS

摘要

In studying the deactivation mechanisms of the Harshaw 0402T cobalt and molybdenum oxide catalyst used in the SYNTHOIL coal liquefaction reactor, a pulsed microreactor with a gas chromatography detection system has been found useful in measuring catalyst activity. Five types of catalyzed reactions important to the SYNTHOIL process were represented in the experiment: hydrodesulfurization (thiophene to C4 hydrocarbons), cracking (diphenylmethane to benzene and toluene), dehydrogenation (tetralin and Napthalene), hydrodeoxygenation (m-cresol to toluene), and hydrodenitrogenation (pyrrole to C4 hydrocarbons). It has been determined that exposure of the catalyst in the SYNTHOIL reactor definitely lowers activities in these five reactions, particularly in catalyst pellets taken from the middle and outlet of the reactor.