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Chemosphere

Title:		"Role of water and other H-rich additives in the catalytic combustion of 1,2-dichloroethane and trichloroethylene"
Author(s):		de Rivas B; Lopez-Fonseca R; Gutierrez-Ortiz MA; Gutierrez-Ortiz JI;
Address:		"Chemical Technologies for Environmental Sustainability Group, Department of Chemical Engineering, Faculty of Science and Technology, Universidad del Pais Vasco/EHU, PO Box 644, E-48080 Bilbao, Spain"
Journal Title:		Chemosphere
Year:		2009
Volume:		20090310
Issue:		10
Page Number:		1356 - 1362
DOI:		10.1016/j.chemosphere.2009.02.019
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"In several practical applications gas streams containing chlorinated volatile organic compounds with variable chemical nature (namely, 1,2-dichloroethane and trichloroethylene) and a significant moisture content (15000ppm) must be addressed. In this paper the control of such emissions by catalytic oxidation over Ce/Zr mixed oxides was analysed. Results in terms of activity and selectivity were compared with those obtained when other H-rich additives (1000ppm), such as hexane or toluene, were fed. High activity was found from mixed oxides featuring a suitable combination of a large population of acid sites, easily accessible oxygen species, and hydrophobic nature attributable to cerium content. The presence of additional H-rich compounds in the feed stream (water, toluene or hexane) tended to decrease the catalytic activity due to the blockage and/or competition for actives sites. However, the increased presence of hydrogen atoms in the stream notably promoted the selectivity to hydrogen chloride instead of molecular chlorine"
Keywords:		Air Pollution/*analysis Catalysis Cerium/chemistry Ethylene Dichlorides/*analysis Hexanes/chemistry Toluene/chemistry Trichloroethylene/*analysis Water/*chemistry Zirconium/chemistry;
Notes:		"Medlinede Rivas, Beatriz Lopez-Fonseca, Ruben Gutierrez-Ortiz, Miguel A Gutierrez-Ortiz, Jose I eng Research Support, Non-U.S. Gov't England 2009/03/13 Chemosphere. 2009 Jun; 75(10):1356-62. doi: 10.1016/j.chemosphere.2009.02.019. Epub 2009 Mar 10"