Effect of Si islands on low-temperature hydrothermal stability of Cu/SAPO-34 catalyst for NH3-SCR

doi:10.1016/j.jtice.2017.09.050

	Effect of Si islands on low-temperature hydrothermal stability of Cu/SAPO-34 catalyst for NH3-SCR
	Lin, Chenlu 2; Cao, Yi 3; Feng, Xi 1; Lin, Qingjin 2; Xu, Haidi 4; Chen, Yaoqiang 1,2,4
刊名	JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
	2017-12-01
卷号	81 页码:288-294
关键词	Si Islands Cu/sapo-34 Low-temperature Hydrothermal Stability Nh3-scr Deactivation Mechanism
ISSN号	1876-1070
DOI	10.1016/j.jtice.2017.09.050
文献子类	Article
英文摘要	The effect of the Si islands on the stability of Cu/SAPO-34 as a selective catalytic reduction (SCR) catalyst during low-temperature hydrothermal treatment (LTH treatment) was experimentally investigated. Cu/TEAOH (high Si islands) and Cu/TEA catalyst (low Si islands) were synthesized and then aged at 70 degrees C with 30 vol.% H2O for 48 h. Importantly, structure defect of SAPO-34 caused by Si islands could reduce the steric hindrance for H2O attacking. The stability of the SAPO-34 framework and isolated Cui-/Cu2+ ions was negatively correlated with high content of Si islands. After LTH treatment, the characterization results showed that an obvious dealumination occurred in Cu/TEAOH-LTH catalyst, with a great loss of relative crystallinity and Bronsted acid sites. Furthermore, the isolate Cu+/Cu2+ aggregated into CuO species in Cu/TEAOH-LTH catalyst, which accounted for the serious decreasing NH3-SCR activities of Cu/TEAOH-LTH catalyst. The results showed that Cu/TEA catalyst with less Si islands showed a better stability of structure and NH3-SCR activity after LTH treatment. (C) 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
WOS关键词	STATE NMR-SPECTROSCOPY ; SAPO-34 ; REDUCTION ; IDENTIFICATION ; DEACTIVATION ; COORDINATION ; ENVIRONMENT ; MECHANISMS ; CU-SSZ-13 ; OXIDATION
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000418211900033
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168404]
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	Xu, Haidi; Chen, Yaoqiang
作者单位	1.Sichuan Univ, Coll Chem Engn, Chengdu 610065, Sichuan, Peoples R China 2.Sichuan Univ, Coll Chem, Minist Educ, Key Lab Green Chem & Technol, Chengdu 610064, Sichuan, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China 4.Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610064, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Lin, Chenlu,Cao, Yi,Feng, Xi,et al. Effect of Si islands on low-temperature hydrothermal stability of Cu/SAPO-34 catalyst for NH3-SCR[J]. JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS,2017,81:288-294.
APA	Lin, Chenlu,Cao, Yi,Feng, Xi,Lin, Qingjin,Xu, Haidi,&Chen, Yaoqiang.(2017).Effect of Si islands on low-temperature hydrothermal stability of Cu/SAPO-34 catalyst for NH3-SCR.JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS,81,288-294.
MLA	Lin, Chenlu,et al."Effect of Si islands on low-temperature hydrothermal stability of Cu/SAPO-34 catalyst for NH3-SCR".JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS 81(2017):288-294.