Effect of Reduction Temperature of a Pt/WO3/ZrO2 Catalyst on n-Heptane Isomerisation
V. A. SHKURENOK1, M. D. SMOLIKOV1,2, S. S. YABLOKOVA1, D. I. KIR'YANOV1, T. I. GULYAEVA1, E. A. PAUKSHTIS3, and A. S. BELY1,2
1Institute of Hydrocarbons Processing, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
2Omsk State Technical University, Omsk, Russia
3Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: n-heptane, isomerisation, tungstate-containing zirconia, platinum
Pages: 101-105
Abstract
The effect of reduction temperature of a Pt/WO3/ZrO2 catalyst (200–500 °С) on indicators of n-heptane isomerisation was studied. It was found that the maximum yield of the desired reaction products that are high-octane di- and trimethyl-substituted (DTMS) n-heptane isomers was reached (27–31 mass %) in the region of the 250–300 °С. A rise in reduction temperature of the catalyst to 400–500 °С leads to an increase in the number of Lewis acid sites in 1.6–1.7 due to partial reduction of tungsten on the WO3/ZrO2 surface, which contributes to an increase in the catalyst activity; herewith, selectivity by the target products decreases due to enhancing side reactions of n-heptane cracking.
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