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- W320390716 abstract "A commercial CoMo/Alumina catalyst (Amocat 1A) was promoted with alkali (Li, Na, K) and alkaline earth (Be, Mg, Ca and Ba) metals at varying levels and subjected to acid sites characterization by the temperature programmed desorption of t-butylamine. The acid sites could be completely extinguished with the alkali metals and with ca and Ba. Only a small reduction in acidity could be achieved with Mg and Be. The original catalyst and the Mg- and Ca- promoted catalysts were each subjected to 250 hour deactivation runs in a laboratory trickle bed hydrotreater using a coal derived liquid containing 20% residuum material. All three catalysts exhibited comparable hydrogenation activities, but the activities for hydrodenitrogenation decreased in the order: unpromoted > Mg-promoted > Ca-promoted. Coke deposition on the used catalysts was in the order: unpromoted (17.2 wt %) > Mg-promoted (13.2 wt %) > Ca-promoted (9.8 wt %). Acidity decreases in the same order. Promotion with alkali and alkaline earth metals appears promising as a means of preparing active catalysts having a reduced coking tendency for coal hydrogenation applications. 17 refs., 6 figs., 4 tabs." @default.
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- W320390716 date "1988-12-21" @default.
- W320390716 modified "2023-10-17" @default.
- W320390716 title "Novel supports for coal liquefaction catalysts: Quarterly report No. 1, 1 September 1988--30 November 1988" @default.
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