The influence of low-temperature hydration methods on the stability of Cu-SAPO-34 SCR catalyst | |
Cao, Lei1; Liu, Zhongmin1; Cao, Yi1; Yang, Miao1; Fan, Dong1; Xu, Shutao1; Tian, Peng1; Sun, Tantan1,2 | |
刊名 | CHEMICAL ENGINEERING JOURNAL |
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 |
DOI | 10.1016/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. |
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关键词 | ACTIVE CU SITES ; HYDROTHERMAL STABILITY ; CU/SAPO-34 CATALYSTS ; NOX REDUCTION ; NH3 ; NH3-SCR ; SAPO-34 ; AMMONIA ; SILICOALUMINOPHOSPHATES ; CU/ZEOLITES |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE SA |
WOS记录号 | WOS:000445413900009 |
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 |
内容类型 | 期刊论文 |
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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