Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate

doi:10.1016/j.cjche.2017.01.005

›› 2017, Vol. 25 ›› Issue (10): 1427-1434.DOI: 10.1016/j.cjche.2017.01.005

• Catalysis, Kinetics and Reaction Engineering • Previous Articles Next Articles

Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate

Lisha Liu¹, Yong Song¹, Zhidan Fu¹, Qing Ye¹, Shuiyuan Cheng¹, Tianfang Kang¹, Hongxing Dai²

1 Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing 100124, China;
2 Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received:2016-11-23 Revised:2017-01-06 Online:2017-11-15 Published:2017-10-28
Supported by:
Supported by the National Natural Science Foundation of China (21277008, 20777005) and the Natural Science Foundation of Beijing (8082008).

Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate

Lisha Liu¹, Yong Song¹, Zhidan Fu¹, Qing Ye¹, Shuiyuan Cheng¹, Tianfang Kang¹, Hongxing Dai²

1 Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing 100124, China;
2 Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

通讯作者: Qing Ye,E-mail addresses:yeqing@bjut.edu.cn;Hongxing Dai,E-mail addresses:hxdai@bjut.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21277008, 20777005) and the Natural Science Foundation of Beijing (8082008).

Abstract

Abstract: The Fe-modified sepiolite-supported Mn-Cu mixed oxide (CuxMny/Fe-Sep) catalysts were prepared using the co-precipitation method. These materials were characterized by means of the XRD, N₂ adsorption-desorption, XPS, H₂-TPR, and O₂-TPD techniques, and their catalytic activities for CO and ethyl acetate oxidation were evaluated. The results show that catalytic activities of the CuxMny/Fe-Sep samples were higher than those of the Cu1/Fe-Sep and Mn2/Fe-Sep samples, and the Mn/Cu molar ratio had a distinct influence on catalytic activity of the sample. Among the CuxMny/Fe-Sep and Cu1Mn2/Sep samples, Cu1Mn2/Fe-Sep performed the best for CO and ethyl acetate oxidation, showing the highest reaction rate and the lowest T₅₀ and T₉₀ of 4.4×10^-6 mmol·g^-1·s^-1, 110, and 140℃ for CO oxidation, and 1.9×10^-6 mmol·g^-1·s^-1, 170, and 210℃ for ethyl acetate oxidation, respectively. Moreover, the Cu1Mn2/Fe-Sep sample possessed the best lowtemperature reducibility and the lowest temperature of oxygen desorption as well as the highest surface Mn⁴⁺/Mn³⁺ and Cu²⁺/CuO atomic ratios. It is concluded that factors, such as the strong interaction between the Cu or Mn and the Fe-Sep support, good low-temperature reducibility, and good mobility of chemisorbed oxygen species, might account for the excellent catalytic activity of Cu1Mn2/Fe-Sep.

Key words: Fe-modified sepiolite, Supported Mn-Cu mixed oxide, Reducibility, Strong metal-support interaction, CO oxidation, Ethyl acetate oxidation

摘要： The Fe-modified sepiolite-supported Mn-Cu mixed oxide (CuxMny/Fe-Sep) catalysts were prepared using the co-precipitation method. These materials were characterized by means of the XRD, N₂ adsorption-desorption, XPS, H₂-TPR, and O₂-TPD techniques, and their catalytic activities for CO and ethyl acetate oxidation were evaluated. The results show that catalytic activities of the CuxMny/Fe-Sep samples were higher than those of the Cu1/Fe-Sep and Mn2/Fe-Sep samples, and the Mn/Cu molar ratio had a distinct influence on catalytic activity of the sample. Among the CuxMny/Fe-Sep and Cu1Mn2/Sep samples, Cu1Mn2/Fe-Sep performed the best for CO and ethyl acetate oxidation, showing the highest reaction rate and the lowest T₅₀ and T₉₀ of 4.4×10^-6 mmol·g^-1·s^-1, 110, and 140℃ for CO oxidation, and 1.9×10^-6 mmol·g^-1·s^-1, 170, and 210℃ for ethyl acetate oxidation, respectively. Moreover, the Cu1Mn2/Fe-Sep sample possessed the best lowtemperature reducibility and the lowest temperature of oxygen desorption as well as the highest surface Mn⁴⁺/Mn³⁺ and Cu²⁺/CuO atomic ratios. It is concluded that factors, such as the strong interaction between the Cu or Mn and the Fe-Sep support, good low-temperature reducibility, and good mobility of chemisorbed oxygen species, might account for the excellent catalytic activity of Cu1Mn2/Fe-Sep.

关键词: Fe-modified sepiolite, Supported Mn-Cu mixed oxide, Reducibility, Strong metal-support interaction, CO oxidation, Ethyl acetate oxidation

Lisha Liu, Yong Song, Zhidan Fu, Qing Ye, Shuiyuan Cheng, Tianfang Kang, Hongxing Dai. Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate[J]. , 2017, 25(10): 1427-1434.

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Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate

Enhanced catalytic performance of Cu-and/or Mn-loaded Fe-Sep catalysts for the oxidation of CO and ethyl acetate

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