Experiment on Hydrothermal Aging over Cu-SSZ-13 Diesel SCR Catalyst

被引：0

作者：

Wei L. ^{[1
]}

Yao D. ^{[1
]}

Wu F. ^{[1
]}

Liu B. ^{[1
]}

Li X. ^{[1
]}

He H. ^{[2
]}

机构：

[1] Power Machinery & Vehicular Engineering Institute, Zhejiang University, Hangzhou

[2] Zhejiang Liming Engine Parts Company Limited, Zhoushan

来源：

Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2018年 / 36卷 / 06期

关键词：

Aging; Hydrothermal; In situ diffuse reflectance infrared Fourier transform spectroscopy; Selective catalytic reduction;

D O I：

10.16236/j.cnki.nrjxb.201806069

中图分类号：

学科分类号：

摘要：

For the improvement of the deactivation mechanism of diesel copper-based zeolite selective catalytic reduction( SCR)catalysts, a flow reactor experimental system was used in hydrothermal aging treatment and activity measurement for one-pot method synthesized Cu-SSZ-13 catalyst, such as standard SCR, NH 3 oxidation and NH 3 -TPD. The catalysts were also characterized based on X-ray diffraction(XRD), in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and H 2 temperature programmed reduction(H 2 -TPR).Through analyzing the measurement results, it is found that the catalyst framework can be crashed by 850℃ hydrothermal treatment, losing most of its SCR activity and number of NH 3 active absorption sites. After 750℃ hydrothermal treatment, the numbers of Brønsted active sites reduces, the position of some copper active sites changes and the copper oxide is generated. As a result, the catalyst activity is lost to a certain extent. © 2018, Editorial Office of the Transaction of CSICE. All right reserved.

引用

页码：531 / 537

页数：6

共 9 条

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