Decomposition of trace chlorobenzene over V₂O₅-WO₃/TiO₂-based catalysts in simulated flue gas
by Shengyong Lu; Rixiao Zhao; Chun Wai Lee; Brian K. Gullett; William R. Stevens; Yong-Xin Zhao
International Journal of Environment and Pollution (IJEP), Vol. 61, No. 3/4, 2017

Abstract: Commercial and laboratory-prepared V₂O₅-WO₃/TiO₂-based catalysts with different compositions were tested for catalytic decomposition of chlorobenzene (ClBz) in simulated waste combustion flue gas. Resonance enhanced multiphoton ionisation-time of flight mass spectrometry (REMPI-TOFMS) was employed to measure real-time trace concentrations of ClBz contained in the flue gas before and after use of the catalyst. The results showed that the ClBz decomposition efficiency was significantly enhanced when nano-TiO₂ instead of conventional TiO₂ was used as the catalyst support. No promotion effects were found in the ClBz decomposition process when the catalysts were wet-impregnated with CuO and CeO₂. A comparison between ClBz and benzene decomposition on the V₂O₅-WO₃/TiO₂-based catalyst showed that different active sites were likely involved in the decomposition mechanism, and the V=O and V-O-Ti groups may only work to catalyse the degradation of the phenyl group and the benzene ring rather than the C-Cl bond.

Online publication date: Wed, 01-Nov-2017

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