Alkali-promoted AlPO4 catalysts, II. Cyclohexene skeletal isomerization to 1- and 3-methylcyclopentenes |
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Authors: | J M Campelo A Garcia D Luna and J M Marinas |
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Institution: | (1) Department of Organic Chemistry, Faculty of Sciences, Cordoba University, 14005 Cordoba, Spain |
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Abstract: | Skeletal isomerization of cyclohexene to 1- and 3-methylcyclopentenes has been carried out at temperatures ranging from 250–400 °C using a microcatalytic pulse technique, over AlPO4 catalysts having various amounts of alkali cations (1–5 wt.%, Li, Na and K). Apparent rate constants and activation energies were calculated in terms of Bassett and Habgood's kinetic model for first order processes in which the surface reaction is the controlling step and partial pressure of the reactant is low. The results show that alkali-containing catalysts exhibit lower activity and higher selectivity to 1-methylcyclopentene than pure AlPO4 due to the modification of the surface acidity by alkali impregnation.
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![icy](/content/hq8l53111137125x/xxlarge1080.gif) ![vcy](/content/hq8l53111137125x/xxlarge1074.gif) ![ncy](/content/hq8l53111137125x/xxlarge1085.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![scy](/content/hq8l53111137125x/xxlarge1089.gif) ![tcy](/content/hq8l53111137125x/xxlarge1090.gif) ![softcy](/content/hq8l53111137125x/xxlarge1100.gif) ![bcy](/content/hq8l53111137125x/xxlarge1073.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![lcy](/content/hq8l53111137125x/xxlarge1083.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) ![vcy](/content/hq8l53111137125x/xxlarge1074.gif) ![ycy](/content/hq8l53111137125x/xxlarge1099.gif) ![scy](/content/hq8l53111137125x/xxlarge1089.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![kcy](/content/hq8l53111137125x/xxlarge1082.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![scy](/content/hq8l53111137125x/xxlarge1089.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) 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![lcy](/content/hq8l53111137125x/xxlarge1083.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![pcy](/content/hq8l53111137125x/xxlarge1087.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) ![ncy](/content/hq8l53111137125x/xxlarge1085.gif) ![tcy](/content/hq8l53111137125x/xxlarge1090.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) ![ncy](/content/hq8l53111137125x/xxlarge1085.gif) , ![chcy](/content/hq8l53111137125x/xxlarge1095.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) ![chcy](/content/hq8l53111137125x/xxlarge1095.gif) ![icy](/content/hq8l53111137125x/xxlarge1080.gif) ![scy](/content/hq8l53111137125x/xxlarge1089.gif) ![tcy](/content/hq8l53111137125x/xxlarge1090.gif) ![ycy](/content/hq8l53111137125x/xxlarge1099.gif) AlPO4 ![vcy](/content/hq8l53111137125x/xxlarge1074.gif) ![scy](/content/hq8l53111137125x/xxlarge1089.gif) ![lcy](/content/hq8l53111137125x/xxlarge1083.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) 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![iecy](/content/hq8l53111137125x/xxlarge1077.gif) ![lcy](/content/hq8l53111137125x/xxlarge1083.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![chcy](/content/hq8l53111137125x/xxlarge1095.gif) ![ncy](/content/hq8l53111137125x/xxlarge1085.gif) ![ycy](/content/hq8l53111137125x/xxlarge1099.gif) ![icy](/content/hq8l53111137125x/xxlarge1080.gif) ![mcy](/content/hq8l53111137125x/xxlarge1084.gif) ![pcy](/content/hq8l53111137125x/xxlarge1087.gif) ![rcy](/content/hq8l53111137125x/xxlarge1088.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) ![gcy](/content/hq8l53111137125x/xxlarge1075.gif) ![ncy](/content/hq8l53111137125x/xxlarge1085.gif) ![icy](/content/hq8l53111137125x/xxlarge1080.gif) ![rcy](/content/hq8l53111137125x/xxlarge1088.gif) ![ocy](/content/hq8l53111137125x/xxlarge1086.gif) ![vcy](/content/hq8l53111137125x/xxlarge1074.gif) ![acy](/content/hq8l53111137125x/xxlarge1072.gif) ![ncy](/content/hq8l53111137125x/xxlarge1085.gif) ![icy](/content/hq8l53111137125x/xxlarge1080.gif) ![iecy](/content/hq8l53111137125x/xxlarge1077.gif) .
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