Catalytic performance of the Mn-Ce catalysts in lean methane combustion prepared by a redox co-precipitation method

ZHONG Liu; LI Xin; FANG Qing-yan; YU Sheng-hui; XU Hao; ZHANG Cheng; CHEN Gang

Volume 47 Issue 3

Mar. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(3): 378-384

ZHONG Liu, LI Xin, FANG Qing-yan, YU Sheng-hui, XU Hao, ZHANG Cheng, CHEN Gang. Catalytic performance of the Mn-Ce catalysts in lean methane combustion prepared by a redox co-precipitation method[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 378-384.

Citation:

ZHONG Liu, LI Xin, FANG Qing-yan, YU Sheng-hui, XU Hao, ZHANG Cheng, CHEN Gang. Catalytic performance of the Mn-Ce catalysts in lean methane combustion prepared by a redox co-precipitation method[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 378-384.

Citation:

ZHONG Liu, LI Xin, FANG Qing-yan, YU Sheng-hui, XU Hao, ZHANG Cheng, CHEN Gang. Catalytic performance of the Mn-Ce catalysts in lean methane combustion prepared by a redox co-precipitation method[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 378-384.

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Catalytic performance of the Mn-Ce catalysts in lean methane combustion prepared by a redox co-precipitation method

State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Funds:

The project was supported by the National Natural Science Foundation of China 51676076

the Research and Development Fund of SKLCC FSKLCC1805

More Information

Corresponding author: FANG Qing-yan, Tel: 027-87542417-8206, E-mail: qyfang@mail.hust.edu.cn
Received Date: 2018-10-16
Rev Recd Date: 2018-12-17

Available Online: 2021-01-23

Publish Date: 2019-03-10

Abstract

Abstract

A series of Mn-Ce catalysts with different Mn/Ce ratios were prepared by a redox co-precipitation method and characterized by N₂ sorption, XRD, XRF and XPS; their catalytic performance in lean methane combustion was investigated. The results indicate that the Mn/Ce ratio has a great influence on the activity of Mn-Ce catalyst in lean methane combustion. With an increase of the Mn/Ce ratio from 3:7 to 9:1, the activity of the Mn-Ce catalyst increases gradually and the reaction temperature needed for a methane conversion of 50% (t₅₀) decreases from 501 ℃ to 446 ℃; however, a further increase in the Mn/Ce ratio may lead to a decrease in the catalytic activity. The performance of Mn-Ce catalyst is related to many factors such as the surface area and the concentration of higher valence manganese (Mn⁴⁺) species, lower valence cerium (Ce³⁺) species and lattice oxygen; in particular, KMn₈O₁₆ is of benefit to enhancing the activity of Mn-Ce catalyst.
- lean methane,
- Mn-Ce catalyst,
- catalytic combustion,
- redox-precipitation method

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References(32)

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