In situ FTIR study of the adsorption and reaction of ortho-dichlorobenzene on Pd-Co sulfated zirconia catalysts

被引：42

作者：

Aristizabal, Beatriz H. ^{[1
]}

Montes de Correa, Consuelo ^{[1
]}

Serykh, Alexander I. ^{[2
]}

Hetrick, Casey E. ^{[2
]}

Amiridis, Michael D. ^{[2
]}

机构：

[1] Univ Antioquia, Environm Catalysis Res Grp, Medellin, Colombia

[2] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA

来源：

JOURNAL OF CATALYSIS | 2008年 / 258卷 / 01期

关键词：

oxidation; adsorption; ortho-dichlorobenzene; sulfated zirconia; cobalt; palladium sulfated zirconia; FTIR;

D O I：

10.1016/j.jcat.2008.06.001

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 adsorption and oxidation of ortho-dichlorobenzene (o-DCB) over sulfated zirconia (SZ), Co-SZ, and Pd/Co-SZ were studied by means of in situ MR spectroscopy to determine the nature of surface intermediates formed on these catalysts. The results indicate that o-DCB adsorbs on Lewis acid sites, forming surface intermediates that are strongly held on the surface. These intermediates can be subsequently oxidized to yield various partial oxidation products in either the presence or absence of gas-phase oxygen, confirming that surface oxygen is involved in the oxidation process. On Pd/Co-SZ samples, the oxidation is faster in the presence of gas-phase oxygen, yielding higher concentrations of partial oxidation products on the catalyst surface. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：95 / 102

页数：8

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