Influence of acid-base properties of catalysts in the gas-phase dehydration-dehydrogenation of cyclohexanol on amorphous AlPO4 and several inorganic solids

被引：68
作者：
Bautista, FM [1 ]
Campelo, JM [1 ]
García, A [1 ]
Luna, D [1 ]
Marinas, JM [1 ]
Quirós, RA [1 ]
Romero, AA [1 ]
机构：
[1] Univ Cordoba, Fac Ciencias, Dept Quim Organ, E-14014 Cordoba, Spain
来源：
APPLIED CATALYSIS A-GENERAL | 2003年 / 243卷 / 01期
关键词：
cyclohexanol conversion; acid-base sites; amorphous AlPO4 catalyst;
D O I：
10.1016/S0926-860X(02)00540-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of metal phosphates (Al, Fe, Ni, Ca and Mn) and stoichiometric (Al/Fe = Al/Ca = 1) mixed systems: FeAl(PO4)(2) and Ca3Al3(PO4)(5), were prepared by an ammonia gelation method. Their amorphous character was determined through several physical methods: nitrogen adsorption, DRIFT and XRD patterns. Gas-phase competitive dehydration/dehydrogenation reaction of cyclohexanol was carried out as a probe reaction and cyclohexene was usually the main reaction product, but different amounts of 1- and 3-methylcyclopentenes as well as cyclohexanone were always obtained. These results were compared to those obtained with 17 commercial inorganic solids (several metal oxides, sulfates and phosphates). A main unexpected conclusion was that cyclohexanol dehydration is obtained not only in acid sites but also in basic sites. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：93 / 107
页数：15
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