Methane catalytic combustion over flame spray pyrolysis-synthesized Pd-Pt/CeO2 catalyst

被引：0

作者：

Wu L. ^{[1
]}

Wang Y. ^{[2
]}

Chen Z. ^{[3
,4
]}

Tian Q. ^{[3
,4
]}

Wang L. ^{[1
]}

Fu Z. ^{[1
]}

Zhao N. ^{[5
]}

Wang X. ^{[1
]}

Huang X. ^{[1
]}

机构：

[1] College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan

[2] Shanxi Lu’an Chemical Group Co., Ltd., Changzhi

[3] State Key Laboratory of Coal and CBM Co-mining, Jincheng

[4] Jinneng Holding Equipment Manufacturing Group Co., Ltd., Jincheng

[5] Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2024年 / 52卷 / 05期

基金：

中国国家自然科学基金;

关键词：

flame spray pyrolysis; impregnation; methane combustion; palladium; stability;

D O I：

10.19906/j.cnki.JFCT.2023083

中图分类号：

学科分类号：

摘要：

Flame spray pyrolysis (FSP) is a versatile, rapid, and scalable preparation technique for the nanocatalysts. CeO2 and Pt-CeO2 carriers, Pd-Pt-CeO2 catalyst were synthesized by flame spray pyrolysis, and then Pd-Pt bimetallic catalysts were prepared by impregnation method, and as-obtained Pd-Pt catalysts were tested in the methane combustion. The physicochemical properties of the catalysts were characterized by ICP, XRD, TEM, BET, H2-TPR, XPS, and Raman. TEM results showed that Pd and Pt species were highly dispersed in CeO2 carriers in Pd-Pt/CeO2 catalysts. Compared with the Pd-Pt-CeO2(OS-FSP) catalyst prepared by one-step flame spray pyrolysis, the catalytic activity of the Pd-Pt/CeO2(0.25)-WI prepared by co-impregnation was higher, with its t50 reduced by 60 ℃, and no deactivation was seen for 60 h. It is attributed to the fact that the Pd-Pt/CeO2(0.25)-WI catalyst has a higher molar ratio of Pd0/Pd2+ and Ce3+/Ce4+ on the surface of the catalyst and more lattice oxygen, resulting in an excellent performance during the methane combustion. © 2024 Science Press. All rights reserved.

引用

页码：725 / 734

页数：9

共 39 条

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