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New insight into simultaneous removal of NO and Hg-0 on CeO2-modified V2O5/TiO2 catalyst: A new modification strategy
Yang, Yang1,3; Xu, Wenqing1,2; Wang, Jian1; Zhu, Tingyu1,2
2019-08-01
Source PublicationFUEL
ISSN0016-2361
Volume249Pages:178-187
Abstract

In this work, it was theoretically speculated that enhancing NO adsorption will simultaneously improve SCR performance and Hg-0 oxidation on a V-based SCR catalyst. As a result, CeO2 was selected as the modification component. The results indicated that CeO2 modification not only significantly improved SCR performance but also apparently enhanced Hg-0 oxidation. Hg-TPD results suggest that Hg-0 can be oxidized to Hg(NO3)(2) but that it was hard to desorb from the catalyst, leading to the blockage of active sites. It was found that HCl facilitated the desorption of adsorbed Hg(NO3)(2), which enabled the recovery of active sites. An innovative nitrate pathway for Hg-0 oxidation was proposed in this work. In situ FTIR experiments indicated that NO can strongly adsorb and generate more nitrite species on a V1CeTi catalyst, with bidentate nitrate species playing an important role in Hg-0 oxidation. Additionally, SO2 and H2O(g) showed no obvious influence on SCR performance, while decreasing the Hg-0 oxidation efficiency at high temperatures. X-ray photoelectron spectroscopy (XPS) analysis revealed that SO2 can react with CeO2 to form Ce-2(SO4)(3), which partially blocked the redox shift between Ce3+ and Ce4+. The proposed nitrate pathway in this work provided a new design and modification strategy for catalysts used for simultaneous removal of NO and Hg-0.

KeywordHg-0 Oxidation No Removal Scr Catalyst Ceo2 No Adsorption
DOI10.1016/j.fuel.2019.03.103
Language英语
WOS KeywordElemental Mercury Oxidation ; Vanadia-titania Catalysts ; Modified Scr Catalyst ; Flue-gas ; Nitric-oxide ; Reduction Scr ; Coal ; Ammonia ; So2 ; Transformation
Funding ProjectNational Key R&D Program of China[2016YFC0204103] ; National Key R&D Program of China[2017YFC0210501] ; Key Research and Development Program of Shanxi Province[201703D111018]
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
Funding OrganizationNational Key R&D Program of China ; Key Research and Development Program of Shanxi Province
WOS IDWOS:000465255500020
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28133
Collection中国科学院过程工程研究所
Corresponding AuthorXu, Wenqing; Zhu, Tingyu
Affiliation1.Chinese Acad Sci, Res Ctr Proc Pollut Control, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Yang,Xu, Wenqing,Wang, Jian,et al. New insight into simultaneous removal of NO and Hg-0 on CeO2-modified V2O5/TiO2 catalyst: A new modification strategy[J]. FUEL,2019,249:178-187.
APA Yang, Yang,Xu, Wenqing,Wang, Jian,&Zhu, Tingyu.(2019).New insight into simultaneous removal of NO and Hg-0 on CeO2-modified V2O5/TiO2 catalyst: A new modification strategy.FUEL,249,178-187.
MLA Yang, Yang,et al."New insight into simultaneous removal of NO and Hg-0 on CeO2-modified V2O5/TiO2 catalyst: A new modification strategy".FUEL 249(2019):178-187.
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