OXIDATION OF ETHANOL OVER BINARY COPPER-TUNGSTEN OXIDE CATALYSTS

Abstract

The oxidation reaction of ethanol on binary copper-tungsten oxide catalysts has been studied. It was shown that at temperatures up to 300°C, acetaldehyde is practically the only product of the ethanol oxidation reaction on copper-tungsten oxide catalysts. At higher temperatures, in addition to acetaldehyde, acetone, carbon dioxide and ethylene are also formed. It is found that the isomerization of butene-1 on the Cu-W-O catalysts begins from a temperature of 200°C and with an increase in temperature, the yield of butenes-2 increases and at 350°C reaches its maximum. It was shown that the dependence of the yields of butenes-2 on the atomic ratio of copper to tungsten has the form of a curve with a maximum on the sample Ti-W=3-7. On this sample, the maximum yield of butenes-2 reaches 57%. It is found that with an increase in the degree of isomerization, the yields of acetaldehyde and ethylene increase, and the yield of the product of deep oxidation decreases, which is due to formation of carbon dioxide at sites of basic nature. Keywords: Ethanol oxidation, isomerization, binary catalysts, tungsten oxide, copper oxide, acetaldehyde.