ARTICLE
TITLE

Dependence of the activity of copper-tungsten oxide catalysts in the ethanol oxidation reaction on their acidic properties

SUMMARY

The reaction of ethanol oxidation on copper-tungsten oxide catalysts has been studied. It has been shown that the main products of ethanol oxidation reaction on tungsten-copper oxide catalysts are acetaldehyde, ethylene, and carbon dioxide. It has been found that with an increase in the reaction temperature, the yields of acetaldehyde and acetone pass through a maximum, while the yields of ethylene and carbon dioxide increase over the entire temperature range studied, reaching their maximum value at 500°C. It has been shown that, on the studied copper-tungsten oxide catalysts, the dependences of the yields of acetaldehyde on the composition of the catalyst have the form of curves with two maxima. In order to characterize the acidic properties of the surface of the studied catalysts, their activity was studied in the isomerization of butene-1 to butenes-2. It was found that when copper is introduced into the composition of the tungsten oxide catalyst, the total yield of butenes-2 passes through a maximum on samples rich in tungsten. It is shown that an increase in the degree of isomerization of binary copper-tungsten oxide catalysts leads to a rise in the yields of ethanol partial oxidation products and a decrease in the yield of carbon dioxide.

 Articles related

O. Y. Isayenko, O. V. Knysh, O. V. Kotsar, T. N. Ryzhkova, G. I. Dyukareva    

The article presents the results of the first study on the influence of biologically active substances Lactobacillus rhamnosus GG ATCC 53103 and Saccharomyces boulardii, obtained according to the author`s method, on growth of gram-negative bacteria with ... see more


O. I. Ryabukha, I. M. Dronyuk    

The task of biomedical diagnostics is to determine the dependence of the conclusion/diagnosis on the sets of parameters that characterize the state of the biosystem/patient. The performed analytical review of modern scientific literature permitted us to ... see more


V. L. Sokolenko, S. V. Sokolenko    

The objective of this research is to assess the relation of radioactive contamination degree to immune system functioning, in the absence or presence of additional potential immunosuppressants. To achieve the objective, during the period of 1995–2015 we ... see more


O. Z. Melnikova, V. P. Lyashenko, T. G. Chaus, D. A. Burceva, L. V. Kalyuzhnaya    

The dynamics of power and waves spectral composition of total background electrical activity in hippocampus and changes of motor and investigative activity of rats during long-lasting stress were investigated. The dependence of analysed indices on durati... see more


A. S. Kholkina,P. A. Arkhipov,Yu. P. Zaikov    

The present work is devoted to the study of lead thermodynamic activity in the Pb-Sb-Bi alloys. The method for EMF measurements of the concentration cell: (–)Pb|KCl-PbCl2¦¦KCl-PbCl2|Pb-(Sb-Bi)(+) was used. The obtained concentration dependences of the ga... see more