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The influence of low-temperature hydration methods on the stability of Cu-SAPO-34 SCR catalyst

文献类型：期刊论文

作者Cao, Lei1; Liu, Zhongmin1; Cao, Yi1; Yang, Miao1; Fan, Dong1; Xu, Shutao1; Tian, Peng1; Sun, Tantan1,2
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2018-12-15
卷号354页码:85-92
关键词Cu-SAPO-34 Hydrothermal stability Deactivation Cycle hydration NH3-SCR
ISSN号1385-8947
DOI10.1016/j.cej.2018.07.195
通讯作者Tian, Peng(tianpeng@dicp.ac.cn) ; Liu, Zhongmin(liuzm@dicp.ac.cn)
英文摘要Low-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.
WOS关键词ACTIVE CU SITES ; HYDROTHERMAL STABILITY ; CU/SAPO-34 CATALYSTS ; NOX REDUCTION ; NH3 ; NH3-SCR ; SAPO-34 ; AMMONIA ; SILICOALUMINOPHOSPHATES ; CU/ZEOLITES
资助项目National 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]
WOS研究方向Engineering
语种英语
WOS记录号WOS:000445413900009
出版者ELSEVIER SCIENCE SA
资助机构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 ; 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
源URL[http://cas-ir.dicp.ac.cn/handle/321008/167024]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Liu, Zhongmin; Tian, Peng
作者单位1.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
推荐引用方式
GB/T 7714		 Cao, Lei,Liu, Zhongmin,Cao, Yi,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, Lei.,Liu, Zhongmin.,Cao, Yi.,Yang, Miao.,Fan, Dong.,...&Sun, Tantan.(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, Lei,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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来源：大连化学物理研究所

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