Extent of monomolecular and bimolecular mechanism in n-butene skeletal isomerization to isobutene over molecular sieves

被引：49
作者：
Cejka, J
Wichterlová, B
Sarv, P
机构：
[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CZ-18223 Prague 8, Czech Republic
[2] Inst Chem Phys & Biophys, EE-0026 Tallinn, Estonia
来源：
APPLIED CATALYSIS A-GENERAL | 1999年 / 179卷 / 1-2期
关键词：
n-butene; skeletal isomerization; bimolecular mechanism; molecular sieve; monomolecular mechanism;
D O I：
10.1016/S0926-860X(98)00320-2
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：
Mechanism of skeletal isomerization of n-butene to isobutene over CoAlPO-11 and H-ferrierite molecular sieves was investigated using C-13 labeled 1-butene. It was confirmed that a high selectivity to isobutene can be reached exclusively via a monomolecular reaction pathway. The bimolecular mechanism is responsible not only for the formation of propylene, pentenes, and other by-products but also for a substantial amount of isobutene. At least 30% of isobutene formed over ferrierite at 620 K was produced via dimerization of butenes followed by isomerization and cracking. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：217 / 222
页数：6
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