PRETREATMENT EFFECT OF GOLD IRON ZEOLITE-Y ON CARBON-MONOXIDE OXIDATION

被引：58

作者：

KANG, YM ^{[1
]}

WAN, BZ ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT CHEM ENGN,TAIPEI 10764,TAIWAN

来源：

CATALYSIS TODAY | 1995年 / 26卷 / 01期

关键词：

GOLD; IRON OXIDE; ZEOLITE; PRETREATMENT; WATER; CARBON MONOXIDE OXIDATION;

D O I：

10.1016/0920-5861(95)00070-V

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A gold/iron/zeolite-Y catalyst was prepared by cation-exchange of iron-impregnated zeolite-Y with a chloroauric acid solution and subjected to various pretreatments prior to being used in carbon monoxide oxidation. The physical properties of the pretreated catalyst were characterized by X-ray powder diffraction, UV-Vis diffuse reflectance spectroscopy, temperature-programmed reduction and temperature-programmed desorption of carbon monoxide. By comparing to gold/zeolite-Y, the presence of iron oxide was found to hinder the sintering of gold metal during high-temperature treatment. The most active and water-durable catalyst was obtained by heating gold/iron/Y in a stream of humidified inert gas flow. The active sites on the catalyst were proposed to be gold hydroxide species surrounded by iron oxide.

引用

页码：59 / 69

页数：11

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