Cyclohexane transformations over metal oxide catalysts. 1. Effect of the nature of metal and support on the catalytic activity in cyclohexane ring opening |
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| Authors: | Masloboishchikova O V Vasina T V Khelkovskaya-Sergeeva E G Kustov L M Zeuthen P |
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| Institution: | (1) Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry, 47 Leninsky prosp., 119991 Moscow, Russian Federation;(2) Haldor Topsoe À/S, DK-2800 Lyngby, Denmark |
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| Abstract: | The activities of monometallic Pt-, Ru-, and Rh-containing catalysts supported on Al2O3, Al2O3—F, SiO2, WO3/ZrO2, and La2Î3/ZrO2, in cyclohexane ring opening to form n-hexane were studied. The most active catalyst is Rh/Al2O3. Cyclohexane hydrogenolysis to n-hexane also occurs over the Pt/Al;>2O3 and Pt/La2Î3/ZrO2 catalysts. Ring opening over the Ru catalysts proceeds at significantly lower temperatures (210—230 °C) than over the Pt and Rh catalysts (350—400 °C), but the ruthenium systems are less selective for n-hexane formation than Rh/Al2O3 catalysts. The effects of acid-basic properties of the support and the reaction conditions on the activities of the catalytic systems in cyclohexane ring opening was studied. |
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| Keywords: | cyclohexane methylcyclopentane n-hexane ring opening hydrogenolysis dehydrogenation isomerization heterogeneous catalysis platinum rhodium ruthenium |
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