Preparation of silicon foam supported CoMn catalysts and their catalytic performances in higher alcohol synthesis via syngas

DU Xin; ZHANG Mingwei; FANG Kegong

doi:10.1016/S1872-5813(24)60444-5

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DU Xin, ZHANG Mingwei, FANG Kegong. Preparation of silicon foam supported CoMn catalysts and their catalytic performances in higher alcohol synthesis via syngas[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60444-5

Citation:

DU Xin, ZHANG Mingwei, FANG Kegong. Preparation of silicon foam supported CoMn catalysts and their catalytic performances in higher alcohol synthesis via syngas[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60444-5

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Preparation of silicon foam supported CoMn catalysts and their catalytic performances in higher alcohol synthesis via syngas

doi: 10.1016/S1872-5813(24)60444-5

DU Xin^{1, 2
,},
ZHANG Mingwei^1
,,
FANG Kegong^{1
,
,}

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The project was supported by National Natural Science Foundation of China (22179137).

Received Date: 2024-01-23
Accepted Date: 2024-03-07
Rev Recd Date: 2024-03-06

Available Online: 2024-04-03

Abstract

Abstract

A series of silicon foam supported CoMn catalysts were prepared using impregnation, precipitation, and hydrothermal methods. Combining the characterization techniques such as XRD, H₂-TPR, N₂ physical adsorption, TEM, and XPS, the effect of different catalyst preparation methods on the catalytic performance in the synthesis of higher alcohols from syngas was investigated. Research has shown that there are Co²⁺(Co₂C) and Co⁰ species on the surface of the catalyst. The active sites of Co₂C-Co⁰ on the surface of the catalyst prepared by hydrothermal synthesis have a good synergistic effect, which is conducive to the generation of alcohols. A higher proportion of Co₂C also promotes the associative adsorption and insertion of CO, resulting in the highest alcohol selectivity. Under the reaction conditions: t=260 ℃, p=5.0 MPa, GHSV=4500 h⁻¹, H₂/CO(volume ratio)=2∶1, the catalyst exhibited the best reaction performance to achieve CO conversion of 11.1%, total alcohol selectivity of 34.7%, and C₂₊OH selectivity of 34.5%.
- synthesis gas,
- higher alcohols,
- silicon foam,
- CoMn catalyst

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References(30)

References

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