A comparative study of the activity and hydrothermal stability of Al-rich Cu-SSZ-39 and Cu-SSZ-13

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

	A comparative study of the activity and hydrothermal stability of Al-rich Cu-SSZ-39 and Cu-SSZ-13
	Shan, Yulong; Shan, Wenpo; Shi, Xiaoyan; Du, Jinpeng; Yu, Yunbo; He, Hong
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2020-05-05
卷号	264 页码:1-8
关键词	Cu-SSZ-39 Cu-SSZ-13 NH3-SCR Hydrothermal stability Al distribution
ISSN号	0926-3373
英文摘要	Catalysts Al-rich Cu-SSZ-39 and Cu-SSZ-13 are applied in ammonia selective catalytic reduction (NH3-SCR) reaction for NOx removal. Al-rich Cu-SSZ-39 maintained its excellent NH3-SCR activity even after hydrothermal aging at 850 degrees C for 16 h, whereas Al-rich Cu-SSZ-13 lost its deNOx activities completely when subjected to the same conditions. The main reason is that the active Cu2+ species are more stable in the structure of Cu-SSZ-39, because SSZ-39 zeolite contained more paired framework Al, leading to that Cu-SSZ-39 catalysts have more hydrothermally stable Cu2+-2Z species as compared to Cu-SSZ-13, and this makes Cu-SSZ-39 accumulate less CuOx during hydrothermal aging. In addition, the framework Al in SSZ-39 is more stable than that in SSZ-13, and a great amount of Cu2+-2Z species coordinated with paired framework Al in Cu-SSZ-39, which leaves fewer residual uncoordinated Al sites. Moreover, SSZ-39 has a more tortuous channel structure than SSZ-13 does. This inhibits the detached Al(OH)(3) from exiting the pores of the AEI zeolite framework, which would result in reincorporation of Al(OH)(3) into the framework when cooling down. Therefore, the Al-rich Cu-SSZ-39 with large amounts of stable paired Al shows a competitive potential candidate as an NH3-SCR catalyst for NOx elimination in practical applications.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45066]
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	Shan, Yulong,Shan, Wenpo,Shi, Xiaoyan,et al. A comparative study of the activity and hydrothermal stability of Al-rich Cu-SSZ-39 and Cu-SSZ-13[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,264:1-8.
APA	Shan, Yulong,Shan, Wenpo,Shi, Xiaoyan,Du, Jinpeng,Yu, Yunbo,&He, Hong.(2020).A comparative study of the activity and hydrothermal stability of Al-rich Cu-SSZ-39 and Cu-SSZ-13.APPLIED CATALYSIS B-ENVIRONMENTAL,264,1-8.
MLA	Shan, Yulong,et al."A comparative study of the activity and hydrothermal stability of Al-rich Cu-SSZ-39 and Cu-SSZ-13".APPLIED CATALYSIS B-ENVIRONMENTAL 264(2020):1-8.