Regeneration of Ni-USY catalysts used in benzene hydrogenation

被引：47

作者：

Pawelec, B ^{[1
]}

Daza, L ^{[1
]}

Fierro, JLG ^{[1
]}

机构：

[1] UNIV DUNDEE, DEPT CHEM, DUNDEE DD1 4HN, SCOTLAND

来源：

APPLIED CATALYSIS A-GENERAL | 1996年 / 145卷 / 1-2期

关键词：

Ni-USY zeolites; regeneration; benzene hydrogenation; TPR; XPS; LR of adsorbed CO;

D O I：

10.1016/0926-860X(96)00134-2

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：

The structural and morphological changes of the metal phases which occur during regeneration in hydrogen and air/hydrogen cycles have been studied for Ni-USY catalysts which had been deactivated during the hydrogenation of benzene. Independent of nickel loading in the zeolite, regeneration in hydrogen alone was not sufficient to restore the initial:activity. Regeneration in air/hydrogen cycles was more successful for catalysts with higher Ni loadings, but structural transformations of the metal particles occurred during the oxidative regeneration process. Temperature programmed reduction (TPR), photoelectron spectroscopy (XPS) and FTIR of adsorbed CO have been used to identify these modifications.

引用

页码：307 / 322

页数：16

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