The self-protection effect of reactant gas on the moisture stability of CuSAPO-34 catalyst for NH3-SCR

doi:10.1016/j.cej.2019.05.227

	The self-protection effect of reactant gas on the moisture stability of CuSAPO-34 catalyst for NH3-SCR
	Cao, Yi 1; Fan, Dong 1; Sun, Lijng 1,2; Yang, Miao 1; Cao, Lei 1; Sun, Tantan 1,2; Xu, Shutao 1; Tian, Peng 1; Liu, Zhongmin 1
刊名	CHEMICAL ENGINEERING JOURNAL
	2019-10-15
卷号	374 页码:832-839
关键词	CuSAPO-34 Stability Residual adspecies Self-protection NH3-SCR
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.05.227
通讯作者	Tian, Peng(tianpeng@dicp.ac.cn) ; Liu, Zhongmin(liuzm@dicp.ac.cn)
英文摘要	The surface of CuSAPO-34 catalysts after NH3-SCR reaction (T <= 400 degrees C) is revealed to have residual adspecies. Cycle hydration methods are designed to explore the influence of the residual species upon the moisture stability of CuSAPO-34. It is demonstrated that the residual species on the catalyst surface are NH3 adspecies, which could help inhibit the transformation of Si(OAl)(4) species to Si islands and prevent the decay of Bronsted acid sites (BAS) during the hydration treatment; the better preserved acidity and the existence of NH3 facilitate the preservation of isolated Cu2+ ions and their reducibility, and thus the SCR activity of the catalysts. The protective effect of residual NH3 species against the low-temperature water vapor is prominent when T <= 300 degrees C, which declines gradually and becomes weak when T > 400 degrees C due to the desorption of NH3 adspecies. The present work implies that the moisture stability of CuSAPO-34 catalyst could be simply ameliorated by locating it in an appropriate zone of the tailpipe to avoid the excessive desorption of the NH3 adspecies.
资助项目	China Postdoctoral Science Foundation[2017M621169] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDB-SSW-JSC040] ; National Natural Science Foundation of China[91545104] ; National Natural Science Foundation of China[21606221] ; National Natural Science Foundation of China[21676262]
WOS关键词	DEACTIVATION MECHANISM RESEARCH ; HYDROTHERMAL STABILITY ; CU/SAPO-34 CATALYSTS ; CU-SAPO-34 CATALYSTS ; BRONSTED ACIDITY ; NOX ; REDUCTION ; COPPER ; NH3 ; AMMONIA
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000477652900076
资助机构	China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/173690]
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	Tian, Peng; Liu, Zhongmin
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, Yi,Fan, Dong,Sun, Lijng,et al. The self-protection effect of reactant gas on the moisture stability of CuSAPO-34 catalyst for NH3-SCR[J]. CHEMICAL ENGINEERING JOURNAL,2019,374:832-839.
APA	Cao, Yi.,Fan, Dong.,Sun, Lijng.,Yang, Miao.,Cao, Lei.,...&Liu, Zhongmin.(2019).The self-protection effect of reactant gas on the moisture stability of CuSAPO-34 catalyst for NH3-SCR.CHEMICAL ENGINEERING JOURNAL,374,832-839.
MLA	Cao, Yi,et al."The self-protection effect of reactant gas on the moisture stability of CuSAPO-34 catalyst for NH3-SCR".CHEMICAL ENGINEERING JOURNAL 374(2019):832-839.