Single stage water gas shift conversion over Pt/TiO2 -: Problem of catalyst deactivation

被引：34

作者：

Azzam, K. G. ^{[1
]}

Babich, I. V. ^{[1
]}

Seshan, K. ^{[1
]}

Lefferts, L. ^{[1
]}

机构：

[1] Univ Twente, IMPACT, Fac Sci & Technol, Catalyt Proc & MAt, NL-7500 AE Enschede, Netherlands

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 338卷 / 1-2期

关键词：

WGS; bifunctional; catalysts; platinum; Titania; stability; deactivation; SMSI; sintering;

D O I：

10.1016/j.apcata.2007.12.020

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：

Pt/TiO2 is an active and selective catalyst for single stage water gas shift reaction. However, the catalyst deactivated with time on stream. Detailed studies of fresh, used, and reactivated Pt/TiO2 catalysts were carried out using kinetic (steady state and transient) and in situ IR spectroscopic methods in order to understand the mechanism of deactivation. The loss of Pt surface area was the cause of Pt/TiO2 deactivation, exclusively. Pt sintering occurred mainly due to the presence of traces of formaldehyde formed under WGS reaction conditions by reaction of H-2 and CO. Details concerning the deactivation behavior are discussed. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：66 / 71

页数：6

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