›› 2020, Vol. 22 ›› Issue (4): 26-34.

• Scientific Research • 上一篇    下一篇

Study on combustion performance of Mn based binary carrier catalyst for ventilation air methane

徐鑫1,刘文革2,3,齐健4,于雷1,韩甲业1,李志1   

  • 收稿日期:2020-09-18 修回日期:2020-11-05 出版日期:2020-12-30 发布日期:2020-12-30
  • 通讯作者: 徐鑫 E-mail:xx8382368@163.com
  • 作者简介:2020-12-01

Study on combustion performance of Mn based binary carrier catalyst for ventilation air methane

  • Received:2020-09-18 Revised:2020-11-05 Online:2020-12-30 Published:2020-12-30
  • Contact: Xu Xin E-mail:xx8382368@163.com

摘要: La-Al2O3 and Ce-Al2O3 binary monolithic column materials with dual functions of carrier and promoter were prepared in one-step by the sol-gel method. Using the as-synthesized binary monolithic column materials as carrier, the 9%Mn/M-Al2O3 (M=La/Ce) catalyst was prepared by the impregnation method. The binary carrier and catalyst were characterized by BET, SEM, XRD, H2-TPR, and O2-TPD techniques, and the methane combustion performance was tested in a micro fixed-bed reactor. Results showed that the Mn-based binary carrier catalyst with dual functions of carrier and promoter had higher catalytic activity than that with single alumina acting as the carrier. The catalyst activity gradually increased with an increasing content of La, while there was no significant effect with the increase in Ce content. When the ratio of La content in La-Al2O3 is 11%, 1 % of methane contained in the ventilation air can be completely converted over the 9%Mn/11% La-Al2O3 catalyst at a temperature as low as 550℃.

关键词: binary carrier, catalytic combustion, VAM, Mn/La-Al2O3, Mn/Ce-Al2O3

Abstract: La-Al2O3 and Ce-Al2O3 binary monolithic column materials with dual functions of carrier and promoter were prepared in one-step by the sol-gel method. Using the as-synthesized binary monolithic column materials as carrier, the 9%Mn/M-Al2O3 (M=La/Ce) catalyst was prepared by the impregnation method. The binary carrier and catalyst were characterized by BET, SEM, XRD, H2-TPR, and O2-TPD techniques, and the methane combustion performance was tested in a micro fixed-bed reactor. Results showed that the Mn-based binary carrier catalyst with dual functions of carrier and promoter had higher catalytic activity than that with single alumina acting as the carrier. The catalyst activity gradually increased with an increasing content of La, while there was no significant effect with the increase in Ce content. When the ratio of La content in La-Al2O3 is 11%, 1 % of methane contained in the ventilation air can be completely converted over the 9%Mn/11% La-Al2O3 catalyst at a temperature as low as 550℃.

Key words: binary carrier, catalytic combustion, VAM, Mn/La-Al2O3, Mn/Ce-Al2O3