Effect of phase composition between nano γ- and χ-Al2O3 on Pt/Al2O3 catalyst in CO oxidation

被引：14

作者：

Vleephoka, Chatchai ^{[1
]}

Chaisuk, Choowong ^{[2
]}

Samparnpiboon, Panida ^{[3
]}

Praserthdam, Piyasan ^{[1
]}

机构：

[1] Chulalongkorn Univ, Ctr Excellence Catalysis & Catalyt React Engn, Fac Engn, Dept Chem Engn, Bangkok 10330, Thailand

[2] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhom 730000, Thailand

[3] Rangsit Univ, Dept Chem Engn, Pathumthanee 12000, Thailand

来源：

CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 04期

关键词：

gamma-Al2O3; chi-Al2O3; phase composition; Pt/Al2O3; CO oxidation;

D O I：

10.1016/j.catcom.2007.04.016

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：

Alumina supports were prepared by solvothermal method of a mixed solution of toluene and butan-1-ol for various chi/gamma phase compositions and the Pt/Al2O3 catalyst was prepared by the incipient wetness impregnation technique. The catalysts were evaluated in the carbon monoxide oxidation. Increasing amount of %chi phase in the alumina supports has roughly the same BET surface area. The different alumina supports were affected on the Pt dispersion on alumina. The pure chi alumina and pure gamma alumina supports had the same effect of catalyst activity. In the various chi/gamma phase compositions, it was found that Pt dispersion and catalyst activity are lower than pure gamma and chi phases for alumina support with 10% chi. The alumina supports with 30-70'% chi gave higher dispersion and activity than pure phase and 10% chi support. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：546 / 550

页数：5

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