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Electrochemical detoxification and recovery of spent SCR catalyst by in-situ generated reactive oxygen species in alkaline media
Xue, Yudong1,2; Zhang, Yang1; Zhang, Ying1; Zheng, Shili1; Zhang, Yi1; Jin, Wei1
2017-10-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume325Pages:544-553
Abstract

An environmental friendly electrochemical detoxification and recovery process is developed for the spent SCR catalysts disposal under alkaline condition. It is revealed that the spent V2O5-WO3/TiO2 catalyst is severely aggregated and poisoned by arsenic compounds. In this study, the efficient removal of arsenic is achieved by the electrochemical advanced oxidation processes (EAOPs) at surface-modified carbon felt cathode, where the HO2- and highly oxidative center dot OH are in-situ generated from two-electron ORR and electro-Fenton-like reaction, respectively. The mechanism of electrochemical arsenic extraction is systematically illustrated by employing the ESR measurements, and vanadium species induced electro-Fenton-like reaction is proposed. After electro-oxidative dissolution, the crystal structure and original composition of the catalyst support (TiO2 and WO3) are well maintained for recycle or subsequently re-fabrication process. After dipping active component on the detoxified catalyst, the regenerated catalyst shows a comparable SCR catalytic activity with the fresh sample. The present electrochemical strategy provides a promising approach for the spent catalysts utilization and further understanding for the in-situ generated reactive oxygen species in alkaline media. (C) 2017 Elsevier B.V. All rights reserved.

KeywordSpent Scr Catalyst Arsenic Reactive Oxygen Species Hydroxyl Radical Eaops
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2017.05.113
Indexed BySCI
Language英语
WOS KeywordAdvanced Oxidation Processes ; Electro-fenton Process ; Organic Pollutants ; Regeneration Method ; Radical Generation ; Reduction Reaction ; Cr(Iii) Oxidation ; Doped Carbon ; Waste-water ; Mechanism
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(51604253 ; CAS Pioneer Hundred Talents Program ; National Basic Research Program of China (973 Program)(2013CB632601 ; 51674230) ; 2013CB632605)
WOS IDWOS:000403733800056
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22715
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xue, Yudong,Zhang, Yang,Zhang, Ying,et al. Electrochemical detoxification and recovery of spent SCR catalyst by in-situ generated reactive oxygen species in alkaline media[J]. CHEMICAL ENGINEERING JOURNAL,2017,325:544-553.
APA Xue, Yudong,Zhang, Yang,Zhang, Ying,Zheng, Shili,Zhang, Yi,&Jin, Wei.(2017).Electrochemical detoxification and recovery of spent SCR catalyst by in-situ generated reactive oxygen species in alkaline media.CHEMICAL ENGINEERING JOURNAL,325,544-553.
MLA Xue, Yudong,et al."Electrochemical detoxification and recovery of spent SCR catalyst by in-situ generated reactive oxygen species in alkaline media".CHEMICAL ENGINEERING JOURNAL 325(2017):544-553.
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