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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
发表期刊CATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
卷号8期号:1页码:297-306
摘要

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.

文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c7cy02175e
收录类别SCI
语种英语
关键词[WOS]Combustion Flue-gas ; Modified Montmorillonite ; Low-temperature ; Hg-0 Removal ; Coal ; Reduction ; Sorbents ; No ; Emissions ; Capture
WOS研究方向Chemistry
WOS类目Chemistry, Physical
项目资助者National Key Research and Development Plan(2017YFC0210501) ; Youth Innovation Promotion Association CAS
WOS记录号WOS:000419051200023
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23463
专题研究所(批量导入)
通讯作者Xu, Wenqing; Zhu, Tingyu
作者单位1.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
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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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