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KMID : 1059519980420060696
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Journal of the Korean Chemical Society
1998 Volume.42 No. 6 p.696 ~ p.702
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A Study on the Sulfur-Resistant Catalysts for Water Gas Shift Reaction. Ⅱ. Effect of Alkali Metal Salt on the Activity of CoMo Catalyst
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Kim Joon-Hee
Lee Ho-In
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Abstract
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The effect of alkali metal salt on the activity of Co-Mo catalyst which has high resistance to sulfur poisoning for water gas shift reaction(WGSR) was studied. Two groups of catalysts were prepared to investigate the effects of anion and cation in alkali metal salts. For K-doped catalysts made with various potassium salts having different anion, the catalytic activity was explained to depend mainly on the BET surface area. Among the catalysts prepared by various nitrates of alkali metal as precursor, the Li-doped catalyst showed the best activity, and the others did not make significant differences giving relatively low activities. And the change of BET surface area by varying the loading of alkali metal showed a similar trend to that of activity. In this case, the activity was dependent on both BET surface area and the ratio of Mo 6+ with a tetrahedral coordination symmetry to Mo6+ with an octahedral one, Mo6+ [T]/MO6+[O] value.
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KEYWORD
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