On the mechanism of the catalytic destruction of dichloromethane over Pt zeolite catalysts

被引：68

作者：

Pinard, L ^{[1
]}

Mijoin, J ^{[1
]}

Ayrault, P ^{[1
]}

Canaff, C ^{[1
]}

Magnoux, P ^{[1
]}

机构：

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

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2004年 / 51卷 / 01期

关键词：

chlorinated VOCs; catalytic oxidation; zeolites; platinum; HFAU; PtHFAU;

D O I：

10.1016/j.apcatb.2004.01.002

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：

Catalytic oxidation of dichloromethane (DCM, 1000 ppm) in wet air was investigated over PtHFAU catalysts differing by their Pt content (from 0 to 0.87 wt.%) the Si/Al ratio being constant and equal to 5. For a given temperature, the rate of DCM transformation is independent of the platinum particles size and of the platinum content. On the other hand, DCM oxidation into CO2 occurs through a bifunctional mechanism: DCM was firstly hydrolysed into HCl and formaldehyde on the Bronsted acid sites of the support. Afterwards, formaldehyde was oxidised into CO2 and H2O On the platinum sites. A reaction scheme was proposed to explain the complete oxidation of DCM over PtHFAU catalysts. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1 / 8

页数：8

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