Studies of an alkali impregnated cobalt-molybdate catalyst for the water-gas shift and the methanation reactions
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1975-03-08
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Virginia Tech
Abstract
On the basis of our investigation of the "Aldridge" catalyst, an alkali impregnated cobalt0-molybdate on an A1 203 support, for the water-gas shift, methanation, and ethanol dehydration reactions, we can make the following conclusions:
- The cesium-impregnated "Aldridge" catalyst is highly active for the water-gas shift reaction under sulfur tolerant conditions.
- The activity of this catalyst is strongly dependent upon the cesium:molybdenum molar ratio. The normalized first order rate constant increases with this ratio until an optimum is reached for the full strength and half strength catalyst.
- The transition temperatures appeared only with the cesium-impregnated full and half strength catalysts, but not with the one-fifth catalysts.
- The potassium-impregnated cobalt-molybdate catalyst is quite active, in Comparison to lithium- and sodium-impregnated versions.
- The cesium-impregnated zinc-molybdate catalyst is not as active as the unimpregnated cobalt-molybdate. Its activity is approximately half that of catalyst "Z" at 400°C.
- We don't believe that the "Aldridge" catalyst is a catalytic melt.
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water-gas shift reactions