title: Effects of PbCl₂ on selective catalytic reduction of NO with NH₃ over vanadia-based catalysts.
abstract: The effects of PbCl2 on the selective catalytic reduction of NO with NH3 over vanadia-based catalysts were studied with BET, XRD, SEM, XPS, NH3-TPD, NH3 chemisorption, FT-IR and catalytic activity measurements. The results showed that PbCl2 deactivated the catalysts to a very high extent. The doping of PbCl2 could decrease the surface acidity, especially that of Brønsted acid sites. XPS characterization reveals that the presence of PbCl2 resulted in the transformation of V(5+) into V(4+), which decreased the reducibility of vanadia species. Based on the analysis of physical and chemical properties of the catalysts, the PbCl2-poisoning mechanism model of the vanadia-based SCR catalysts was proposed.
authors.affiliation: College of Pipeline and Civil Engineering, China University of Petroleum, 66 Changjiang West Road, Qingdao 266580, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China. Electronic address: xgao1@zju.edu.cn.
authors.forename: Xiang
authors.initials: X
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
authors.forename: Yongxin
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
authors.forename: Weihong
authors.initials: W
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Song
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
authors.forename: Zhongyang
authors.initials: Z
authors.lastname: Luo
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
authors.forename: Kefa
authors.initials: K
authors.lastname: Cen
mesh_terms: D000327:Adsorption; D000641:Ammonia / Q000737:chemistry*; D002384:Catalysis; D007854:Lead / Q000737:chemistry*; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D016062:Porosity; D013499:Surface Properties; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D017968:Vanadium Compounds; D007854:Lead; D009569:Nitric Oxide; C029891:lead chloride; D000641:Ammonia
keywords: Activity; Nitrogen oxide; PbCl(2); Selective catalytic reduction; V(2)O(5)/TiO(2)