Mode of zeolite catalysts deactivation during chlorinated VOCs oxidation

被引：43

作者：

Guillemot, M. ^{[1
]}

Mijoin, J. ^{[1
]}

Mignard, S. ^{[1
]}

Magnoux, P. ^{[1
]}

机构：

[1] Univ Poitiers, CNRS, UMR 6503, Catalyse Chim Organ Lab, F-86022 Poitiers, France

来源：

APPLIED CATALYSIS A-GENERAL | 2007年 / 327卷 / 02期

关键词：

deactivation; catalytic oxidation; chlorinated VOCs; zeolite; FAU;

D O I：

10.1016/j.apcata.2007.05.012

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 catalytic oxidation of tetrachloroethylene (PCE), chosen as model for chlorinated hydrocarbons, was investigated over WHY, Pt/NaY and Pt/NaX under humid conditions at a space velocity of 15,300 h(-1). PCE is selectively transformed into carbon dioxide (CO2) and hydrochloric acid (HQ over all catalysts studied in this work. 1.2%Pt/HY exhibits the highest activity with the complete conversion of PCE at 500 degrees C and undergoes no significant deactivation after 4 h of reaction. It was also highlighted in this work, that water vapour plays a preponderant role for PCE transformation and limits catalyst deactivation. On the other hand, platinum-exchanged sodic faujasites (Pt/NaFAU) are also active in PCE transformation but it appeared that 1%Pt/NaX underwent a high and rapid deactivation by the formation of sodium chloride (NaCl) clusters. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：211 / 217

页数：7

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