Regeneration studies on nickel molybdate catalysts used for the upgrading of coal-derived liquids |
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Authors: | Peter A Hertan Frank P Larkins WRoy Jackson |
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Affiliation: | Department of Chemistry, Monash University, Clayton, Victoria 3168 Australia |
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Abstract: | Nickel molybdate catalysts used in several different upgrading reactions of coal-derived materials from low-rank Australian coals have been regenerated and their activity assessed using a number of physical and chemical techniques. Regeneration of spent coked catalysts for 20 hours in air at 450°C was sufficient to restore chemical hydrogenation activity to catalyst used for pre-asphaltene, asphaltene and oil upgrading, provided poisoning of the catalyst surface by other impurities, principally chlorine-containing molecules, had not occurred. |
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