title: Catalytic destruction of pentachlorobenzene in simulated flue gas by a V2O5-WO3/TiO2 catalyst.
abstract: Pentachlorobenzene (PeCB) in simulated flue gas was destructed by a commercial V(2)O(5)-WO(3)/TiO(2) catalyst in this study. The effects of reaction temperature, oxygen concentration, space velocity and some co-existing pollutants on PeCB conversion were investigated. Furthermore, a possible mechanism for the oxidation of PeCB over the vanadium oxide on the catalysts was proposed. Results show that the increase of gas hourly space velocity (GHSV) and the decrease of operating temperature both resulted in the decrease of PeCB removal over the catalyst, while the effect of the oxygen content in the range of 5-20% (v/v) on PeCB conversion was negligible. PeCB decomposition could be obviously affected by the denitration reactions under the conditions because of the positive effect of NO but negative effect of NH(3). The introduction of SO(2) caused the catalyst poisoning, probably due to the sulfur-containing species formed and deposited on the catalyst surface. The PeCB molecules were first adsorbed on the catalyst surface, and then oxidized into the non-aromatic acyclic intermediates, low chlorinated aromatics and maleic anhydride.
authors.affiliation: POPs Research Center, School of Environment, Tsinghua University, Beijing, PR China.
authors.forename: Zhenzhen
authors.initials: Z
authors.lastname: Xu
authors.forename: Shubo
authors.initials: S
authors.lastname: Deng
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Tingting
authors.initials: T
authors.lastname: Zhang
authors.forename: Qiming
authors.initials: Q
authors.lastname: Cao
authors.forename: Jun
authors.initials: J
authors.lastname: Huang
authors.forename: Gang
authors.initials: G
authors.lastname: Yu
mesh_terms: D000641:Ammonia / Q000737:chemistry; D002384:Catalysis; D002722:Chlorobenzenes / Q000737:chemistry*; D005740:Gases; D017745:Incineration; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D013458:Sulfur Dioxide / Q000737:chemistry; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D002722:Chlorobenzenes; D005740:Gases; D010087:Oxides; D017968:Vanadium Compounds; D013458:Sulfur Dioxide; C009495:titanium dioxide; D000641:Ammonia; C511604:tungsten oxide; C066075:vanadium pentoxide; D014025:Titanium; C003060:pentachlorobenzene; D010100:Oxygen; D014414:Tungsten