Promoted stability of Cu/ZnO/Al2O3 catalysts for methanol production from CO2 hydrogenation by La modification

NIU Mengmeng; JIANG Yanan; ZHANG Xian; ZHANG Cuijuan; LIU Yuan

doi:10.1016/S1872-5813(24)60438-X

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NIU Mengmeng, JIANG Yanan, ZHANG Xian, ZHANG Cuijuan, LIU Yuan. Promoted stability of Cu/ZnO/Al2O3 catalysts for methanol production from CO2 hydrogenation by La modification[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60438-X

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NIU Mengmeng, JIANG Yanan, ZHANG Xian, ZHANG Cuijuan, LIU Yuan. Promoted stability of Cu/ZnO/Al₂O₃ catalysts for methanol production from CO₂ hydrogenation by La modification[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60438-X

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Promoted stability of Cu/ZnO/Al₂O₃ catalysts for methanol production from CO₂ hydrogenation by La modification

doi: 10.1016/S1872-5813(24)60438-X

NIU Mengmeng^1
,,
JIANG Yanan^1
,,
ZHANG Xian^2
,,
ZHANG Cuijuan^1
,,
LIU Yuan^{1
,
,}

1.
Tianjing Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
2.
Ordos Carbon Neutral Research and Application Company Limited, Ordos 017000, China

Funds: The project was supported by National Natural Science Foundation of China (21872101, 21962014), the Key Research and Development Program of Ordos (YF20232313), Ordos Industrial Innovation Talent Team and the regional cooperation program of Shanxi (202204041101029).

Received Date: 2024-01-25
Accepted Date: 2024-03-04
Rev Recd Date: 2024-02-29

Available Online: 2024-03-14

Abstract

Abstract

Deactivation of Cu/ZnO/Al₂O₃ catalysts in CO₂ hydrogenation to methanol reaction is one of the main reasons limiting their application. We synthesized a series of La modified Cu/ZnO/Al₂O₃ catalysts by adding different contents of La to improve the stability. In the 100 h short-term stability test at 200 ℃ under 3 MPa with a GHSV of 12000 mL/(g·h), the unmodified Cu/ZnO/Al₂O₃ catalysts degraded obviously over 100 h. In sharp contrast, the stability was significantly promoted by the addition of La. The best activity was achieved with 5% La added samples (4% CO₂ conversion and 85% methanol selectivity). Which also showed impressive stability over 1000 h except about17% deactivation during the initial 190−220 h. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results revealed that the addition of 5% La improved the dispersion of Cu and Zn , inhibited the sintering of Cu, stabilized the Cu^0/+ species and retarded oxidation of Cu in catalysts, which attributed to the high stability of the catalysts.
- Cu/ZnO/Al₂O₃,
- La promoter,
- stability

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References(36)

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