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
a:2:{s:4:"TEXT";s:167:"Institute of Hydrocarbons Processing, Siberian Branch of the Russian Academy of Sciences, Ul. Neftezаvodskаya 54, Omsk 644040 (Russia)
E-mail: jane@ihcp.ru ";s:4:"TYPE";s:4:"html";}
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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