The Impact of Reaction Pressure on the Catalytic Performance of the Pd-Sb/TiO2 Catalyst in the Acetoxylation of Toluene into Benzyl Acetate

被引：3

作者：

Madaan, Neetika ^{[1
]}

Gatla, Suresh ^{[1
]}

Kalevaru, Venkata Narayana ^{[1
]}

Radnik, Joerg ^{[1
]}

Pohl, Marga-Martina ^{[1
]}

Luecke, Bernhard ^{[1
]}

Brueckner, Angelika ^{[1
]}

Martin, Andreas ^{[1
]}

机构：

[1] Univ Rostock, Leibniz Inst Katalyse eV, D-18059 Rostock, Germany

来源：

CHEMCATCHEM | 2013年 / 5卷 / 01期

关键词：

acetoxylation; antimony; gas-phase reactions; palladium; X-ray diffraction; AROMATIC ACETOXYLATION; PHASE ACETOXYLATION; DEACTIVATION; SIZE;

D O I：

10.1002/cctc.201200522

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 acetoxylation of toluene in the presence of acetic acid and oxygen was performed over a Pd-Sb/TiO2 catalyst at 210 degrees C and at various reaction pressures (1-10 bar). A remarkable improvement in the catalytic performance and a significant shortening of the induction period were found with an increase in pressure. At a pressure of 6 bar, the highest toluene conversion of 75% and 100% selectivity for benzyl acetate were observed. This result could be due to both the restructuring of the catalyst surface and to the formation of active Pd-Sb particles of desired size, composition, and shape during the course of the induction period. Samples of the most-active and spent catalysts were studied by ex situ and in situ XRD, XPS, and TEM.

引用

页码：185 / 191

页数：7

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