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Support effect of Mn-based catalysts for gaseous elemental mercury oxidation and adsorption
Wu, Yinghong1,2; Xu, Wenqing1,3; Yang, Yang1,2; Wang, Jian1; Zhu, Tingyu1,3
2018-01-07
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume8Issue:1Pages:297-306
Abstract

Mn-Based catalysts with a Mn loading of 4 wt% were prepared using an impregnation method. Their Hg-0 removal efficiencies were in the following order: 4% Mn/MK10 (montmorillonite K 10) > 4% Mn/SiO2 > 4% Mn/TiO2 > 4% Mn/Al2O3. Results from various characterization techniques, such as BET, XRD, STEM, H-2-TPR, Hg-0-TPD and XPS, suggested that the species, morphologies, and distributions of MnOx led to the different performances in Hg-0 removal. The support effect on Hg-0 adsorption and oxidation was studied. For 4% Mn/Al2O3 and 4% Mn/SiO2, physical adsorption dominates Hg-0 removal at low temperature (150 degrees C), while chemical adsorption is more important at high temperature (350 degrees C). At both low and high temperatures, chemical adsorption and oxidation play leading roles in 4% Mn/TiO2 and 4% Mn/MK10, respectively. The effect of MnOx species and their morphologies on Hg-0 oxidation was investigated. Amorphous MnO2 benefits Hg-0 oxidation at both low and high temperatures, while amorphous Mn2O3 only facilitates Hg-0 oxidation at high temperature. Hg-0 oxidation on Mn-based catalysts follows a Mars-Maessen mechanism where the lattice oxygen of MnOx reacts with the absorbed Hg-0.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c7cy02175e
Indexed BySCI
Language英语
WOS KeywordCombustion Flue-gas ; Modified Montmorillonite ; Low-temperature ; Hg-0 Removal ; Coal ; Reduction ; Sorbents ; No ; Emissions ; Capture
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Key Research and Development Plan(2017YFC0210501) ; Youth Innovation Promotion Association CAS
WOS IDWOS:000419051200023
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23463
Collection研究所(批量导入)
Corresponding AuthorXu, Wenqing; Zhu, Tingyu
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing Engn Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Wu, Yinghong,Xu, Wenqing,Yang, Yang,et al. Support effect of Mn-based catalysts for gaseous elemental mercury oxidation and adsorption[J]. CATALYSIS SCIENCE & TECHNOLOGY,2018,8(1):297-306.
APA Wu, Yinghong,Xu, Wenqing,Yang, Yang,Wang, Jian,&Zhu, Tingyu.(2018).Support effect of Mn-based catalysts for gaseous elemental mercury oxidation and adsorption.CATALYSIS SCIENCE & TECHNOLOGY,8(1),297-306.
MLA Wu, Yinghong,et al."Support effect of Mn-based catalysts for gaseous elemental mercury oxidation and adsorption".CATALYSIS SCIENCE & TECHNOLOGY 8.1(2018):297-306.
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