Reactivation of sintered Pt/Al2O3 oxidation catalysts

被引：51

作者：

Galisteo, FC

Mariscal, R

Granados, ML

Fierro, JLG

Daley, RA

Anderson, JA

机构：

[1] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain

[2] Univ Aberdeen, Kings Coll, Dept Chem, Surface Chem & Catalysis Grp, Aberdeen AB24 3UE, Scotland

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2005年 / 59卷 / 3-4期

关键词：

diesel oxidation catalyst; sintering; platinum; reactivation; oxychlorination;

D O I：

10.1016/j.apcatb.2005.02.004

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 reactivation of thermally sintered Pt/Al2O3 catalysts used in the simultaneous oxidation of CO and propene has been achieved by an oxychlorination treatment. The catalyst can be considered to model the active component of the catalytic converter fitted to diesel driven cars. Platinum crystallites redispersion was verified by XRD, H-2 chemisorption, TEM and FTIR. The extent of regeneration reflects the platinum particle redispersion achieved by such a treatment. Oxychlorination also introduced electronic effects in the Pt particle caused by the presence of chlorine at the Pt-Al2O3 interface but no detrimental result of this was observed in the oxidation reactions. The results indicate that the deactivation of the diesel oxidation catalysts (DOCs) can be reverted by this simple treatment resulting in a remarkable recovery of the catalytic activity. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：227 / 233

页数：7

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