1.Zhejiang University, Hangzhou 310007, Zhejiang, China
2.Hangzhou Economic Technological Development Zone Environmental Monitoring Station, Hangzhou 310007,Zhejiang, China
3.Jiangsu Angel Exhaust Gas Purification Co.,Ltd., Yixing 214201, Jiangsu, China
4.Hangzhou Shuangbo Environmental Protection Technology Co.,Ltd.,Hangzhou 310007, Zhejiang, China
Abstract
Pd-Pt-Ce/Al2O3 catalysts were prepared by the impregnation method.The influence of Pd and Pt loadings,the types and loadings of the additives and space velocity on catalytic activity of the catalysts for toluene combustion was investigated.The results showed that the suitable content of noble metals and additives could significantly improve the catalytic activity of Pd-Pt/Al2O3 catalysts.When the mass fractions of Pd,Pt and Ce were 0.05%,0.005% and 1%,respectively,Pd-Pt-Ce/Al2O3 catalyst exhibited better catalytic activity under low temperature condition.The space velocity had obvious influence on the catalytic activity of the catalyst and suitable space velocity was less than 20 000 h-1.
Keyword:
catalyst engineering; environmental engineering; precious metal catalyst; catalytic combustion
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2010
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黎维彬, 龚浩. 催化燃烧去除VOCs污染物的最新进展[J]. , 2010, 26(4): 885-894. LiWeibin, GongHao. Recent progress in the removal of volatile organic compounds by catalytic combustion[J]. , 2010, 26(4): 885-894.
Catalytic combustion is one of the most effective techniques for the removal of volatile organic compounds (VOCs). In this review, the recent developments in catalytic combustion of VOCs with regard to active species such as noble metal catalysts, mixed metal oxides, perovskite and spinel metal oxide phases were examined. The effects of particle sizes of active species, catalyst supports, the water vapor effect and the coking effect on catalytic combustion were evaluated. It is found that the research on noble metal catalysts mainly focuses on developing new supports and bi-elemental noble metal catalysts; while the research on non-noble metal catalysts focuses on developing new mixed metal oxides, perovskites and spinel catalysts, as well as investigating the effects of particle sizes and various supports on the combustion activity. Additionally, as far as practical application is concerned, the effect of water vapor and coking deactivation on the catalytic combustion process are discussed. This review will be helpful in choosing an appropriate technique for the removal of VOCs by catalytic combustion with high activity and high stability.