Optimization of the Composition of Pt/B2O3–Al2O3 Catalyst for Hydroisomerization of Benzene–Containing Fractions
E. D. FEDOROVA, M. O. KAZAKOV, A. V. LAVRENOV, K. S. BUYALSKAYA, N. N. LEONTYEVA, T. I. GULYAEVA and A. V. SHILOVA
Institute of Hydrocarbons Processing, Siberian Branch of the Russian Academy of Sciences, Ul. Neftezаvodskаya 54, Omsk 644040 (Russia)
E-mail: jane@ihcp.ru
Keywords: borate–containing aluminium oxide, hydroisomerization, decrease in benzene content
Pages: 107–113
Abstract
The possibility to use available and easily synthesized borate-containing aluminium oxide as an acidic support for the catalyst of hydroisomerization of benzene-containing gasoline fractions was demonstrated for the first time. The phase composition, texture characteristics and acid properties of B2O3–Al2O3 systems with boron oxide content 0.9–39.0 mass %, obtained by mixing pseudo-boehmite with solid ortho–boric acid followed by annealing at a temperature of 600 °C were studied. For hydroisomerization of the model mixture of n-heptane with benzene it was shown that the most efficient sample is Pt/B2O3–Al2O3 with the support containing 27.5 mass % of boron oxide. This catalyst provides almost complete benzene hydrogenation Данный and the maximal yield of methylcyclopentane (12.1 mass %) and isoheptanes (43.5 mass %) at a temperature of 350 °C. Higher selectivity of isomerization reactions in this case is connected with the smaller amount of strong acid centres on the catalyst surface.
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