Comparison of supported Au/Fe2O3, Au/TiO2, and Au/Al2O3 catalysts in the oxidation of CO with oxygen

被引：0

作者：

Kaczmarek, Elzbieta ^{[1
]}

Ignaczak, Wojciech ^{[1
]}

Jozwiak, Wojciech K. ^{[1
]}

机构：

[1] Tech Univ Lodz, Inst Chem Ogolnej & Ekol, PL-90924 Lodz, Poland

来源：

PRZEMYSL CHEMICZNY | 2006年 / 85卷 / 8-9期

关键词：

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Activity of 0.5-10% Au/Fe2O3 or /TiO2 or /Al2O3 catalysts prepd. by impregnation (with aq. HAuCl4), co-pptn., or deposition-pptn., was studied in oxidn. of 3% CO with 6% O-2 in He in a flow reactor at -80 to 500 degrees C. The conversion/catalyst activity fell in the descending support order: Fe2O3 > TiO2 > Al2O3. Alkalis (10% KOH) activated low-activity catalysts and also reduced the reaction temp. by as much as 200 degrees C. The copptd. and the deposited (with urea as additive) catalysts were superior (Au crystallites < 5 nm) to the impregnated catalysts. Pptn. agents affected the conversion deg. in the descending order: KOH > Na2CO3 (NaBH) > Na2CO3 > NH3.

引用

页码：734 / 736

页数：3

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