Performance of manganese-zirconium composite oxide in the catalytic reduction of NO by CO

TAN Guan-xi; CHI Yao-ling; LI Shuang; YI Yu-feng; JIN Guang-zhou

Volume 47 Issue 10

Oct. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(10): 1258-1264

TAN Guan-xi, CHI Yao-ling, LI Shuang, YI Yu-feng, JIN Guang-zhou. Performance of manganese-zirconium composite oxide in the catalytic reduction of NO by CO[J]. Journal of Fuel Chemistry and Technology, 2019, 47(10): 1258-1264.

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TAN Guan-xi, CHI Yao-ling, LI Shuang, YI Yu-feng, JIN Guang-zhou. Performance of manganese-zirconium composite oxide in the catalytic reduction of NO by CO[J]. Journal of Fuel Chemistry and Technology, 2019, 47(10): 1258-1264.

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Performance of manganese-zirconium composite oxide in the catalytic reduction of NO by CO

School of Chemical Engineering, Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, Beijing Institute of Petrochemical Technology, Beijing 102617, China

Funds:

the National Basic Research Program of China 973 program, 2012CB215002

More Information

Corresponding author: JIN Guang-zhou, E-mail: jinguangzhou@bipt.edu.cn
Received Date: 2019-06-28
Rev Recd Date: 2019-07-15

Available Online: 2021-01-23

Publish Date: 2019-10-10

Abstract

Abstract

A series of manganese-zirconium composite oxides were prepared by citric acid complexing method and characterized by XRD, H₂-TPR, XPS and SEM; their performance in the catalytic reduction of NO by CO was investigated. The results show that Mn₃O₄ is the main phase for MnO_x in the Mn-Zr composite oxide; an increase in the Zr content can promote the dispersion of Mn₃O₄ and reduce the average grain size of Mn₃O₄. Mn may exist in the form of Mn²⁺, Mn³⁺ and Mn⁴⁺ ions; the content of (Mn³⁺ + Mn⁴⁺) and the quantity of surface adsorbed oxygen (OA) increase after the addition of Cu and Ce, which is beneficial to enhancing the catalytic activity. The pristine Mn-Zr-O composite shows a relatively low activity in the catalytic reduction of NO by CO; after adding Cu, the Mn-Cu-Zr-O composite exhibits much higher activity than Mn-Zr-O; moreover, the activity of Mn-Cu-Ce-Zr-O composite is even enhanced by adding Ce. For the catalytic reduction of NO by CO over the Mn-Cu-Ce-Zr-O composite at 350℃ and with a space velocity of 18000 h^-1, the CO conversion and NO conversion are 89.17% and 91.70%, respectively.
- Mn-based composite oxide,
- CO,
- NO,
- catalytic reduction,
- activity

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References(26)

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