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
收藏
页码：15 / 22
页数：8
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