Enhancement of Au capture efficiency and activity of Au/TS-1 catalysts for propylene epoxidation

被引：135

作者：

Cumaranatunge, L ^{[1
]}

Delgass, WN ^{[1
]}

机构：

[1] Purdue Univ, Sch Chem Engn, W Lafayette, IN 47907 USA

来源：

JOURNAL OF CATALYSIS | 2005年 / 232卷 / 01期

基金：

美国能源部;

关键词：

propylene oxide; propylene epoxidation; gold catalysts; TS-1; Au/TS-1; deposition precipitation; gold deposition on TS-1; ammonium nitrate enhancernent of Au deposition; activity enhancement;

D O I：

10.1016/j.jcat.2005.02.006

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：

A method for enhancing the useful Au content in Au/TS-1 catalysts for vapor-phase propylene epoxidation is reported. Exposure of calcined TS-1 support to 1 M NH4NO3 at 80 degrees C, followed by vacuum drying, produced a modified TS-1 support material. Deposition precipitation of gold on these modified TS-1 supports resulted in a fourfold increase in Au capture efficiency and produced catalysts with 5-10% conversion of propylene with 75-85% selectivity for PO. at 200 degrees C and a space velocity of 7000 ml h(-1) g(cat)(-1) In this system, 10% conversion and 76% selectivity amount to a rate of 134 g(PO) h(-1) kg(cat)(-1), An optimal Au content that is support dependent is observed for these cat catalysts. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：38 / 42

页数：5

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