The effect of crystallite size on low-temperature hydrothermal stability of Cu-SAPO-34

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	The effect of crystallite size on low-temperature hydrothermal stability of Cu-SAPO-34
	Du, Jinpeng; Shi, Xiaoyan; Shan, Yulong; Wang, Yingjie; Zhang, Wenshuo; Yu, Yunbo; Shan, Wenpo; He, Hong
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2020-05-07
卷号	10 期号:9 页码:2855-2863
ISSN号	2044-4753
英文摘要	Two Cu-SAPO-34 samples with similar chemical compositions but different crystallite sizes of 10 mu m and 2 mu m, respectively, were obtained by modifying crystallization conditions. The effect of crystallite size on the low-temperature hydrothermal stability of Cu-SAPO-34 was comparatively investigated. The results showed that Cu-SAPO-34 with smaller particle size possessed better resistance to treatment at 70 degrees C in humid conditions. During low-temperature hydrothermal aging, isolated Cu2+ species in Cu-SAPO-34 tended to be attacked by water vapor to form Cu(OH)(2) species, which can combine with extra-framework Al to form inactive CuAl2O4 species. The superior stability of Cu-SAPO-34 with smaller crystallite size is primarily attributed to the lower Cu concentration on the crystal surface compared with the sample with larger particle size. Thus, more active Cu sites were maintained on small-size Cu-SAPO-34 after low-temperature hydrothermal aging.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44557]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Du, Jinpeng,Shi, Xiaoyan,Shan, Yulong,et al. The effect of crystallite size on low-temperature hydrothermal stability of Cu-SAPO-34[J]. CATALYSIS SCIENCE & TECHNOLOGY,2020,10(9):2855-2863.
APA	Du, Jinpeng.,Shi, Xiaoyan.,Shan, Yulong.,Wang, Yingjie.,Zhang, Wenshuo.,...&He, Hong.(2020).The effect of crystallite size on low-temperature hydrothermal stability of Cu-SAPO-34.CATALYSIS SCIENCE & TECHNOLOGY,10(9),2855-2863.
MLA	Du, Jinpeng,et al."The effect of crystallite size on low-temperature hydrothermal stability of Cu-SAPO-34".CATALYSIS SCIENCE & TECHNOLOGY 10.9(2020):2855-2863.