CAS OpenIR
A promising approach to recover a spent SCR catalyst: Deactivation by arsenic and alkaline metals and catalyst regeneration
Li, Meng1,2,3; Liu, Biao2; Wang, Xinran2; Yu, Xiaobin5; Zheng, Shili2; Du, Hao2,4; Dreisinger, David3; Zhang, Yi2
2018-06-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume342Pages:1-8
Abstract

A large amount of spent selective catalytic reduction (SCR) catalyst is generated annually. The spent SCR catalyst is poisoned by arsenic and alkaline metals. These spent catalysts also contain substantial amounts of heavy metals and are therefore considered as hazardous solid waste. In order to decontaminate the catalysts from As, K and Na poisoning, recover the valuable metals (V and W) and regenerate the catalysts, an efficient and green advanced oxidation process (AOPs) named oxidative ammonium bicarbonate leaching (OABL) at moderate temperature and ambient pressure was developed. The effect of the leaching parameters on the V, W, As, Na, K and Ti leaching efficiencies was investigated. The mechanisms of V5+ and W6+ species extraction process were investigated. Furthermore, the mechanism of extraction of the low valent As3+ was studied by ESR and a V4+ triggered Fenton-like reaction was proposed. The crystal structure of the catalyst substrate anatase (TiO2) was not affected by the leaching process. After impregnation with active components, the activity of the regenerated SCR catalyst was close to the level of the fresh catalyst with an NO conversion of 91% at 400 degrees C. Therefore, this work has introduced a new method for efficient regeneration of the spent catalyst.

KeywordSpent Scr Catalyst Hazardous Waste Arsenic Oxidative Ammonium Leaching Catalyst Regeneration
DOI10.1016/j.cej.2017.12.132
Language英语
WOS KeywordWaste-water Treatment ; Radical Generation ; Vanadium ; Extraction ; Molybdenum ; Potassium ; Iron ; Performance ; Nh3-scr ; Acid
Funding ProjectNational Natural Science Foundation of China[51404227] ; National Natural Science Foundation of China[51604254] ; National Natural Science Foundation of China[91634111] ; Science and Technology Service Network Initiative for the Chinese Academy of Sciences[KFJ-SW-STS-148] ; National Basic Research Program of China (973 Program)[2013CB632605] ; China Scholarship Council (CSC)[201506080059]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Science and Technology Service Network Initiative for the Chinese Academy of Sciences ; National Basic Research Program of China (973 Program) ; China Scholarship Council (CSC)
WOS IDWOS:000440404800001
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/25414
Collection中国科学院过程工程研究所
Corresponding AuthorDu, Hao; Dreisinger, David
Affiliation1.Northeastern Univ, Sch Met, Shenyang 110819, Liaoning, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China
Recommended Citation
GB/T 7714
Li, Meng,Liu, Biao,Wang, Xinran,et al. A promising approach to recover a spent SCR catalyst: Deactivation by arsenic and alkaline metals and catalyst regeneration[J]. CHEMICAL ENGINEERING JOURNAL,2018,342:1-8.
APA Li, Meng.,Liu, Biao.,Wang, Xinran.,Yu, Xiaobin.,Zheng, Shili.,...&Zhang, Yi.(2018).A promising approach to recover a spent SCR catalyst: Deactivation by arsenic and alkaline metals and catalyst regeneration.CHEMICAL ENGINEERING JOURNAL,342,1-8.
MLA Li, Meng,et al."A promising approach to recover a spent SCR catalyst: Deactivation by arsenic and alkaline metals and catalyst regeneration".CHEMICAL ENGINEERING JOURNAL 342(2018):1-8.
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