title: [Oxidation of mercury by CuBr2 decomposition under controlled-release membrane catalysis condition].
abstract: CuBr2 in the multi-porous ceramic membrane can release Br2 at high temperature, which was employed as the oxidant for Hg0 oxidation. Hg0 oxidation efficiency was studied by a membrane catalysis device. Meanwhile, a reaction and in situ monitoring device was designed to avoid the impact of Br2 on the downstream pipe. The result showed that the MnO(x)/alpha-Al2O3 catalysis membrane had a considerable "controlled-release" effect on Br2 produced by CuBr2 decomposition. The adsorption and reaction of Hg0 and Br2 on the surface of catalysis membrane obeyed the Langmuir-Hinshelwood mechanism. The removal efficiency of Hg0 increased with the rising of Br2 concentration. However, when Br2 reached a certain concentration, the removal efficiency was limited by adsorption rate and reaction rate of Hg0 and Br2 on the catalysis membrane. From 473 K to 573 K, the variation of Hg0 oxidation efficiency was relatively stable. SO2 in flue gas inhibited the oxidation of Hg0 while NO displayed no obvious effect.
authors.forename: Lin-Gang
authors.initials: LG
authors.lastname: Hu
authors.forename: Zan
authors.initials: Z
authors.lastname: Qu
authors.forename: Nai-Qiang
authors.initials: NQ
authors.lastname: Yan
authors.forename: Yong-Fu
authors.initials: YF
authors.lastname: Guo
authors.forename: Jiang-Kun
authors.initials: JK
authors.lastname: Xie
authors.forename: Jin-Ping
authors.initials: JP
authors.lastname: Jia
mesh_terms: D000327:Adsorption; D001965:Bromides / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D008567:Membranes, Artificial; D008628:Mercury / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D001965:Bromides; D008567:Membranes, Artificial; C408079:cupric bromide; D003300:Copper; D008628:Mercury