DICP OpenIR
The influence of low-temperature hydration methods on the stability of Cu-SAPO-34 SCR catalyst
Cao, Yi1; Fan, Dong1; Tian, Peng1; Cao, Lei1; Sun, Tantan1,2; Xu, Shutao1; Yang, Miao1; Liu, Zhongmin1
Corresponding AuthorTian, Peng(tianpeng@dicp.ac.cn) ; Liu, Zhongmin(liuzm@dicp.ac.cn)
KeywordCu-SAPO-34 Hydrothermal stability Deactivation Cycle hydration NH3-SCR
Source PublicationCHEMICAL ENGINEERING JOURNAL
2018-12-15
ISSN1385-8947
DOI10.1016/j.cej.2018.07.195
Volume354Pages:85-92
Funding ProjectNational Natural Science Foundation of China[21473182] ; National Natural Science Foundation of China[91545104] ; National Natural Science Foundation of China[21606221] ; National Natural Science Foundation of China[21676262] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDB-SSW-JSC040] ; China Postdoctoral Science Foundation[2017M621169]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS Research AreaEngineering
WOS KeywordACTIVE CU SITES ; HYDROTHERMAL STABILITY ; CU/SAPO-34 CATALYSTS ; NOX REDUCTION ; NH3 ; NH3-SCR ; SAPO-34 ; AMMONIA ; SILICOALUMINOPHOSPHATES ; CU/ZEOLITES
AbstractLow-temperature hydration experiments are designed to explore the influence of hydration time and cycle hydration on the stability of Cu-SAPO-34 catalyst. All the hydration treatments are conducted at 80 degrees C. Experiments on the impact of hydration time reveal that a fast activity loss for Cu-SAPO-34 occurs at the initial hydration stage of 30 min, and further extending the time until 24 h only leads to a much slower drop rate. Conversely, cycle hydration, which is close to the working conditions of the SCR catalyst, causes a continuous activity drop as the increase of hydration cycles (steaming for 30 min/cycle). Multiple characterizations reveal that in comparison with hydration time method, cycle hydration induces a faster loss of acid sites and decrease of reducibility of isolated Cu2+ to Cu+, both of which cause the severer deactivation of the catalyst. This occurs due to the repeated high-temperature treatments involved in the cycle hydration treatment, which promote the migration of Cu ions among the CHA cages, cause a fast deterioration of Bronsted acid sites, and thus obviously alter the micro-environments of Cu ions and their reducibility.
Language英语
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS IDWOS:000445413900009
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/167025
Collection中国科学院大连化学物理研究所
Corresponding AuthorTian, Peng; Liu, Zhongmin
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Cao, Yi,Fan, Dong,Tian, Peng,et al. The influence of low-temperature hydration methods on the stability of Cu-SAPO-34 SCR catalyst[J]. CHEMICAL ENGINEERING JOURNAL,2018,354:85-92.
APA Cao, Yi.,Fan, Dong.,Tian, Peng.,Cao, Lei.,Sun, Tantan.,...&Liu, Zhongmin.(2018).The influence of low-temperature hydration methods on the stability of Cu-SAPO-34 SCR catalyst.CHEMICAL ENGINEERING JOURNAL,354,85-92.
MLA Cao, Yi,et al."The influence of low-temperature hydration methods on the stability of Cu-SAPO-34 SCR catalyst".CHEMICAL ENGINEERING JOURNAL 354(2018):85-92.
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