Study on the effect of active sites of ethanol synthesis from syngas over RhCu bimetallic catalyst

WANG Zhan-hui; LING Li-xia; WANG Jun-gang; SUN De-kui; HOU Bo; LI De-bao; ZHANG Ri-guang; WANG Bao-jun

doi:10.19906/j.cnki.JFCT.2021017

Volume 49 Issue 3

Mar. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(3): 358-365

WANG Zhan-hui, LING Li-xia, WANG Jun-gang, SUN De-kui, HOU Bo, LI De-bao, ZHANG Ri-guang, WANG Bao-jun. Study on the effect of active sites of ethanol synthesis from syngas over RhCu bimetallic catalyst[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 358-365. doi: 10.19906/j.cnki.JFCT.2021017

Citation:

WANG Zhan-hui, LING Li-xia, WANG Jun-gang, SUN De-kui, HOU Bo, LI De-bao, ZHANG Ri-guang, WANG Bao-jun. Study on the effect of active sites of ethanol synthesis from syngas over RhCu bimetallic catalyst[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 358-365. doi: 10.19906/j.cnki.JFCT.2021017

Citation:

WANG Zhan-hui, LING Li-xia, WANG Jun-gang, SUN De-kui, HOU Bo, LI De-bao, ZHANG Ri-guang, WANG Bao-jun. Study on the effect of active sites of ethanol synthesis from syngas over RhCu bimetallic catalyst[J]. Journal of Fuel Chemistry and Technology, 2021, 49(3): 358-365. doi: 10.19906/j.cnki.JFCT.2021017

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Study on the effect of active sites of ethanol synthesis from syngas over RhCu bimetallic catalyst

doi: 10.19906/j.cnki.JFCT.2021017

1.
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
3.
Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

Funds: The project was supported by the National Natural Science Foundation of China (21736007), the National Natural Science Foundation of China (21576178) and Shanxi Scholarship Council of China (2016-030)

Received Date: 2020-11-03
Rev Recd Date: 2020-11-30

Available Online: 2021-03-19

Publish Date: 2021-03-19

Abstract

Abstract

Developing efficient and stable bimetallic catalysts has been a highly promising challenge for the direct synthesis of ethanol from syngas in recent years. In this study, a series of RhCu/P25 bimetallic catalysts with different Rh contents were prepared by combining the urea-assisted gel method and the impregnation method, and their performance in ethanol synthesis from syngas was studied. The results show that Rh-modified Cu-based catalyst can effectively promote the ethanol production. However, when the active sites of Rh and Cu are in close contact, the reaction products are mainly methane and methanol, and ethanol content is very low. This should be attributed to the inhibition of the adsorption of CO molecules on the Rh and Cu active sites. When the spatial distance between the Rh and Cu active sites is increased by physical mixing, the adsorption of CO molecules is significantly enhanced, and the catalytic activity and ethanol selectivity are improved.
- RhCu bimetallic catalysts,
- ethanol,
- close contact,
- spatial distance,
- active sites

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References(37)

References

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