Modeling of Dehydrogenation and Oxidative Dehydrogenation of Isopropyl Alcohol Over Ti-V-O Catalyst

The activities of the titanium-vanadium oxide catalysts in the dehydrogenation and oxidative dehydrogenation of isopropyl alcohol to acetone have been studied. It is found that the main products of the dehydrogenation reaction of isopropyl alcohol are acetone and propylene, while the oxidation of isopropyl alcohol in the reaction products also leads to the formation of a significant amount of carbon dioxide. It was shown that the yield and distribution of the reaction products strongly depend on the reaction temperature and the composition of the feedstock. It was found that the activity of titanium-vanadium oxide catalysts in the conversion of isopropyl alcohol to acetone in the presence of oxygen is significantly higher than in the presence of nitrogen, which is in good agreement with the performed thermodynamic calculations. Thus, the highest acetone yield on the studied catalysts reaches 37.4% with a selectivity of 89.3%. Studies have shown that the activity of binary titanium-vanadium oxide catalysts is also depends on their composition. It was found that in the reaction of isopropyl alcohol dehydrogenation to acetone with increasing titanium content in the binary titanium-vanadium oxide catalyst, the acetone yield passes through a maximum on the sample Ti-V = 5-5. When the reaction is carried out in the presence of oxygen, a picture of the dependence of the acetone yield on the atomic ratio of titanium to vanadium is observed with two maxima for the samples V = 1-9 and Ti-V = 7-3. In order to account for imprecision of experimental data, we proposed to use fuzzy rules for modeling of the considered dependence.