Mesoporous ZSM-5 zeolites via alkali treatment for the direct hydroxylation of benzene to phenol with N2O

被引：65

作者：

Gopalakrishnan, S. ^{[1
]}

Zampieri, A. ^{[1
]}

Schwieger, W. ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Lehrstuhl Chem Reakt Techn, D-91058 Erlangen, Germany

来源：

JOURNAL OF CATALYSIS | 2008年 / 260卷 / 01期

关键词：

Benzene hydroxylation; Nitrous oxide; Phenol; Mesoporous zeolite;

D O I：

10.1016/j.jcat.2008.09.002

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：

An alkali treatment of a commercial ZSM-5 zeolite induces substantial intra crystalline mesoporosity through desilication process. The resulting mesoporous H-ZSM-5 zeolite has been tested for the hydroxylation of benzene and it was found to increase the lifetime of the catalyst by suppressing the catalyst deactivation and enhancing the phenol yield and selectivity with time on stream. The EPR investigations showed that the state of Fe was not altered upon alkali treatment. It is suggested that the improvements in the catalytic performances are due to the presence of mesopores in the crystals, which likely reduce the lengths of remaining micropores and improve the transport of the phenol molecule out of the zeolite crystal. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：193 / 197

页数：5

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