Platinum Catalysts Based on Zeolites and Modified Aluminium Oxide in the Joint Hydroisomerization of Heptane and Benzene
E. D. FEDOROVA, M. O. KAZAKOV, E. A. BULUCHEVSKY, A. V. LAVRENOV
Institute of Hydrocarbons Processing, Siberian Branch of the Russian Academy of Sciences, Ul. Neftezаvodskаya 54, Omsk 644040 (Russia)
Keywords: бензол, гидроизомеризация, анион-модифицированный оксид алюминия, цеолиты, benzene, hydroisomerization, anion-modified aluminium oxide, zeolites
Abstract
Results of the tests of platinum-containing catalysts on supports <>-ZrO2-Al2O3, B2O3-Al2O3 and WO3-Al2O3, as well Y-type, beta and mordenite zeolites mixed with aluminium oxide, within temperature range 200-375 °C are presented. It is shown that zeolite-containing catalysts ensure the maximal yield of methylcyclopentane - at a level of 14 mass % at a temperature of 275-300 °C. At higher temperature, the contribution from side reactions of cycle opening and hydrocracking increases on zeolite catalysts. Among anion-modified systems, the highest selectivity is demonstrated by the sample Pt/WO3-Al2O3: the maximal yield of target methylcyclopentane and isoheptanes in the product mixture is 16.2 and 57 mass %, respectively. Almost complete benzene removal is provided, and the degree of heptane transformation is 80.6 %.
|
