title: Decomposition of hexachlorobenzene over Al2O3 supported metal oxide catalysts.
abstract: Decomposition of hexachlorobenzene (HCB) was investigated over several metal oxides (i.e., MgO, CaO, BaO, La2O3, CeO2, MnO2, Fe2O3, and Co3O4) supported on Al2O3, which was achieved in closed system at a temperature of 300 degrees C. Catalysts were prepared by incipient wetness impregnation with different metal oxides loading and impregnating solvents. The decomposition efficiency of different catalysts for this reaction depends on the nature of the metal oxide used, and Al2O3 supported La2O3 was found to be the most active one. Pentachlorobenzene (PeCB), and all tetrachlorobenzene (TeCB), trichlorobenzene (TrCB), and dichlorobenzene (DCB) isomers were detected after the decomposition reaction, indicating that the decomposition was mainly a dechlorination process. The detection of all lower chlorinated benzenes suggested the complexity of decomposition and the presence of more than one dechlorination pathway.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. lifei.zhang@yahoo.com.cn
authors.forename: Lifei
authors.initials: L
authors.lastname: Zhang
authors.forename: Minghui
authors.initials: M
authors.lastname: Zheng
authors.forename: Bing
authors.initials: B
authors.lastname: Zhang
authors.forename: Wenbin
authors.initials: W
authors.lastname: Liu
authors.forename: Lirong
authors.initials: L
authors.lastname: Gao
authors.forename: Te
authors.initials: T
authors.lastname: Ba
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Ren
authors.forename: Guijin
authors.initials: G
authors.lastname: Su
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D006581:Hexachlorobenzene / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*
chemical_list: D008670:Metals; D010087:Oxides; D006581:Hexachlorobenzene; D000537:Aluminum Oxide