Catalytic performance of La-modified Cu/SiO<sub>2</sub> in the hydrogenation of methyl acetate

ZHANG Chuanming; LI Weijie; KANG Jincan; LIN Lina; LI Changxin; LI Lincai; ZOU Haoyu; ZHU Hongping

doi:10.1016/S1872-5813(23)60382-2

Volume 52 Issue 2

Feb. 2024

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Article Navigation > Journal of Fuel Chemistry and Technology > 2024 > 52(2): 131-139

ZHANG Chuanming, LI Weijie, KANG Jincan, LIN Lina, LI Changxin, LI Lincai, ZOU Haoyu, ZHU Hongping. Catalytic performance of La-modified Cu/SiO2 in the hydrogenation of methyl acetate[J]. Journal of Fuel Chemistry and Technology, 2024, 52(2): 131-139. doi: 10.1016/S1872-5813(23)60382-2

Citation:

ZHANG Chuanming, LI Weijie, KANG Jincan, LIN Lina, LI Changxin, LI Lincai, ZOU Haoyu, ZHU Hongping. Catalytic performance of La-modified Cu/SiO₂ in the hydrogenation of methyl acetate[J]. Journal of Fuel Chemistry and Technology, 2024, 52(2): 131-139. doi: 10.1016/S1872-5813(23)60382-2

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Catalytic performance of La-modified Cu/SiO₂ in the hydrogenation of methyl acetate

doi: 10.1016/S1872-5813(23)60382-2

State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Funds: The project was supported by National Natural Science Foundation of China (21972112, 22172123) and Productive and Researching Foundation of Fujian Province (2021H6002).

Received Date: 2022-07-03
Accepted Date: 2023-08-02
Rev Recd Date: 2022-08-04

Available Online: 2023-09-18

Publish Date: 2024-02-02

Abstract

Abstract

A series of Cu/SiO₂ catalysts modified with lanthanum (La) (30Cu-nLa/SiO₂, n=0, 0.5, 1 and 2) were synthesized using the ethanol (EtOH)-assisted ammonia-evaporation method; their catalytic performance in the gas-phase hydrogenation of methyl acetate (MeOAc) to produce ethanol (EtOH) was investigated. The results indicate that the catalytic performance of Cu/SiO₂ can be greatly enhanced by La modification. In particular, the 30Cu-0.5La/SiO₂ catalyst exhibits excellent performance in the MeOAc hydrogenation; under 230 °C, 2 MPa H₂, an LHSV of 2 h⁻¹ and an H₂/MeOAc molar ratio of 20, the MeOAc conversion reaches 98.5%, with a total EtOH yield of 97.0%. The N₂-sorption, XRD, ICP-OES, H₂-TPR, FT-IR, TEM, XPS, and AES characterization results reveal that the introduced La metal has a strong interaction with Cu, which can promote the dispersion of the copper species on the SiO₂ support. Moreover, the content of Cu⁺ is increased significantly, which can enhance the electronic interaction with MeOAc via the acyl and methoxide groups and thus promote the hydrogenation of MeOAc to EtOH.
- methyl acetate,
- hydrogenation,
- ethanol,
- Cu/SiO₂,
- La modification

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References(36)

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