Studies on Catalytic Hydrotreating of Recycled Solvents from Coal Liquefaction Process (Part 2)

Investigation of Kinetics, Catalyst Deactivation and Prediction of Catalyst Life

Abstract

The following items have been reported based on the results of a series of catalytic hydrotreating tests of feed solvents obtained from a coal liquefaction process using Ni-Mo/alumina catalyst: (1) the kinetics of the hydrogenation of the recycled solvents obtained from a 1t/day PDU liquefaction process using Wandoan and Illinois No. 6 (River King) coals; (2) their reactivities on hydrogenation; (3) the catalyst deactivation during a 3, 000h test run using recycled solvent derived from Wandoan coal and a proposal of simple mathematical model and its application to the long run test data; (4) the prediction of catalyst life from hydrotreating tests of the recycled solvents prepared from Wandoan and Illinois No. 6 coals by maintaining constant hydrogenation rates.