中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
New insight into simultaneous removal of NO and Hg-0 on CeO2-modified V2O5/TiO2 catalyst: A new modification strategy

文献类型:期刊论文

作者Yang, Yang1,3; Xu, Wenqing1,2; Wang, Jian1; Zhu, Tingyu1,2
刊名FUEL
出版日期2019-08-01
卷号249页码:178-187
关键词Hg-0 Oxidation No Removal Scr Catalyst Ceo2 No Adsorption
ISSN号0016-2361
DOI10.1016/j.fuel.2019.03.103
英文摘要

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.

WOS关键词Elemental Mercury Oxidation ; Vanadia-titania Catalysts ; Modified Scr Catalyst ; Flue-gas ; Nitric-oxide ; Reduction Scr ; Coal ; Ammonia ; So2 ; Transformation
资助项目National 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研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000465255500020
出版者ELSEVIER SCI LTD
资助机构National Key R&D Program of China ; Key Research and Development Program of Shanxi Province
源URL[http://ir.ipe.ac.cn/handle/122111/28133]  
专题中国科学院过程工程研究所
通讯作者Xu, Wenqing; Zhu, Tingyu
作者单位1.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
推荐引用方式
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.

入库方式: OAI收割

来源:过程工程研究所

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