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题名: High hydrothermal stability of Cu-SAPO-34 catalysts for the NH3-SCR of NOx
作者: Niu, Can; Shi, Xiaoyan; Liu, Fudong; Liu, Kuo; Xie, Lijuan; You, Yan; He, Hong
刊名: CHEMICAL ENGINEERING JOURNAL
出版日期: 2016-06-15
卷号: 294, 页码:254-263
关键词: Cu-SAPO-34 ; NH3-SCR ; Hydrothermal stability ; Copper species
DOI: 10.1016/j.cej.2016.02.086
部门归属: 水污染控制实验室
英文摘要: The effects of calcination temperature, Cu source and co-template contents on the activity and hydrothermal stability of Cu-SAPO-34 catalysts prepared by the one-pot hydrothermal synthesis method were investigated. Appropriate calcination temperature was important for the deNOx activity of Cu-SAPO-34 catalyst. The amount of Cu source and co-template in the resulting gel could impact the Cu loading and the crystallization of the final Cu-SAPO-34. Preferably, hydrothermal treatment of the Cu-SAPO-34 catalyst with Cu loading ca. 3.44% at 750 degrees C for 16 h increased the NH3-SCR activity slightly due to migration of CuO to isolated Cu2+ and the maintenance of the crystallinity as well as the acidity. Moreover, the catalyst aged at 800 degrees C for 16 h maintained >90% NOx conversion from 225 to 400 degrees C, and the crystallinity, active Cu2+ species and acidity in Cu-SAPO-34 were not destroyed completely after such harsh treatment. Meanwhile, kinetic analysis over fresh and aged Cu-SAPO-34 samples were conducted and the conclusion were in agreement with the NH3-SCR tests, H-2-TPR and NH3-TPD results. (C) 2016 Elsevier B.V. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36233
Appears in Collections:水污染控制实验室_期刊论文

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