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Role of NO in Hg-0 oxidation over a commercial selective catalytic reduction catalyst V2O5-WO3/TiO2
Liu, Ruihui1,2; Xu, Wenqing1; Tong, Li1; Zhu, Tingyu1

Experiments were conducted in a fixed-bed reactor that contained a commercial catalyst, V2O5-WO3/TiO2, to investigate mercury oxidation in the presence of NO and O-2. Mercury oxidation was improved by NO, and the efficiency was increased by simultaneously adding NO and O-2. With NO and O-2 pretreatment at 350 degrees C, the catalyst exhibited higher catalytic activity for Hg-0 oxidation, whereas NO pretreatment did not exert a noticeable effect. Decreasing the reaction temperature boosted the performance of the catalyst treated with NO and O-2. Although NO promoted Hg-0 oxidation at the very beginning, excessive NO counteracted this effect. The results show that NO plays different roles in Hg-0 oxidation; NO in the gaseous phase may directly react with the adsorbed Hg-0, but excessive NO hinders Hg-0 adsorption. The adsorbed NO was converted into active nitrogen species (e. g., NO2) with oxygen, which facilitated the adsorption and oxidation of Hg-0. Hg-0 was oxidized by NO mainly by the Eley-Rideal mechanism. The Hg-0 temperature-programmed desorption experiment showed that weakly adsorbed mercury species were converted to strongly bound ones in the presence of NO and O-2. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

KeywordMercury No Mechanism Selective Catalytic Reduction Catalyst Oxidation Vanadium
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
WOS KeywordCombustion Flue-gas ; Phase Elemental Mercury ; Activated Carbon ; Fuel Gas ; Removal ; Sorbents ; Temperature ; Adsorption ; Mechanism ; Emissions
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Basic Research Program(973) of China(2013CB430005) ; National Ministry of Environmental Protection(201309018) ; National Hi-Tech Research and Development Program (863) of China(2013AA065404)
WOS IDWOS:000370547800015
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorXu, Wenqing
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
2.Northeastern Univ, Qinhuangdao Branch, Sch Resources & Mat, Key Lab Dielect & Electrolyt Funct Mat Hebei Prov, Qinhuangdao 066004, Peoples R China
Recommended Citation
GB/T 7714
Liu, Ruihui,Xu, Wenqing,Tong, Li,et al. Role of NO in Hg-0 oxidation over a commercial selective catalytic reduction catalyst V2O5-WO3/TiO2[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2015,38(DEC):126-132.
APA Liu, Ruihui,Xu, Wenqing,Tong, Li,&Zhu, Tingyu.(2015).Role of NO in Hg-0 oxidation over a commercial selective catalytic reduction catalyst V2O5-WO3/TiO2.JOURNAL OF ENVIRONMENTAL SCIENCES,38(DEC),126-132.
MLA Liu, Ruihui,et al."Role of NO in Hg-0 oxidation over a commercial selective catalytic reduction catalyst V2O5-WO3/TiO2".JOURNAL OF ENVIRONMENTAL SCIENCES 38.DEC(2015):126-132.
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