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 | |
刊名 | CHEMICAL ENGINEERING JOURNAL |
2017-10-01 | |
卷号 | 325页码:544-553 |
关键词 | Spent Scr Catalyst Arsenic Reactive Oxygen Species Hydroxyl Radical Eaops |
ISSN号 | 1385-8947 |
DOI | 10.1016/j.cej.2017.05.113 |
文献子类 | Article |
英文摘要 | 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. |
WOS关键词 | Advanced Oxidation Processes ; Electro-fenton Process ; Organic Pollutants ; Regeneration Method ; Radical Generation ; Reduction Reaction ; Cr(Iii) Oxidation ; Doped Carbon ; Waste-water ; Mechanism |
WOS研究方向 | Engineering |
语种 | 英语 |
WOS记录号 | WOS:000403733800056 |
资助机构 | National Natural Science Foundation of China(51604253 ; CAS Pioneer Hundred Talents Program ; National Basic Research Program of China (973 Program)(2013CB632601 ; 51674230) ; 2013CB632605) |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/22715] |
专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
作者单位 | 1.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 |
推荐引用方式 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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