Catalytic combustion of chlorinated ethylenes over H-zeolites

被引：33

作者：

López-Fonseca, R ^{[1
]}

Gutiérrez-Ortiz, JI ^{[1
]}

Gutiérrez-Ortiz, MA ^{[1
]}

González-Velasco, JR ^{[1
]}

机构：

[1] Univ Pais Vasco EHU, Fac Ciencias, Dept Ingn Quim, E-48080 Bilbao, Spain

来源：

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 2003年 / 78卷 / 01期

关键词：

chlorinated ethylenes; VOC; catalytic combustion; H-zeolites;

D O I：

10.1002/jctb.726

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Several H-zeolites (H-Y, H-ZSM-5 and H-MOR) were investigated for the catalytic combustion of chlorinated ethylenes, namely 1,1-dichloroethylene and trichloroethylene. Conversion was inversely related to the chlorine content of the feed molecule. H-ZSM-5 zeolite was the most active catalyst in 1,1-dichloroethylene combustion whereas H-MOR was the most effective zeolite for trichloroethylene destruction. Temperature-programmed desorption of ammonia and diffuse reflectance FT-IR measurements of adsorbed pyridine revealed that strong Bronsted acidity plays an important role in controlling the activity of H-zeolites. The main combustion products were CO, CO2, HCl, and Cl-2. Additionally, small amounts of highly chlorinated by-products were also detected, namely trichloroethylene and tetrachloroethylene. H-zeolites showed a great selectivity to HCl formation. (C) 2002 Society of Chemical Industry.

引用

页码：15 / 22

页数：8

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