Effect of specific surface on the activities of binary Zr-Zn-O catalysts in the reaction of ethanol conversion

Abstract

The activities of binary zirconium-zinc oxide catalysts in the reaction of ethanol conversion to acetone were studied. It has been established that with an increase in the reaction temperature, the yields of acetone, carbon dioxide, and acetaldehyde pass through a maximum. In contrast, the yield of ethylene increases over the entire temperature range studied. It was found that the dependences of the acetone yield and the ethanol conversion on the atomic ratio of zirconium to zinc have the form of a curve with two maxima. A maximal yield of acetone 58.2% was observed over catalyst Zr-Zn=8-2 at a temperature of 500°C. The specific surfaces of zirconium-zinc oxide catalysts have been studied. It has been established that the specific surface area of zirconium-zinc oxide catalysts varies in the ra.8 m2/g. The effect of the surface on the yields of ethanol conversion products has been studied. It has been shown that with an increase in the specific surface area of zirconium-zinc oxide catalysts, the yield of acetone passes through a maximum. In contrast, the yields of acetaldehyde, carbon dioxide, and ethylene practically do not change.