Effect of hydrothermal synthesis time on the performance of Cu/Ce-Zr catalysts for catalytic water-gas shift reaction

KANG Yu-shu; WANG Li-bao; LI Yong-zhi; BAI Jin; ZHANG Cai-shun; LIU Dao-sheng; ZHANG Lei; GAO Zhi-xian

doi:10.19906/j.cnki.JFCT.2022074

Volume 51 Issue 6

Jun. 2023

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Article Navigation > Journal of Fuel Chemistry and Technology > 2023 > 51(6): 776-782

KANG Yu-shu, WANG Li-bao, LI Yong-zhi, BAI Jin, ZHANG Cai-shun, LIU Dao-sheng, ZHANG Lei, GAO Zhi-xian. Effect of hydrothermal synthesis time on the performance of Cu/Ce-Zr catalysts for catalytic water-gas shift reaction[J]. Journal of Fuel Chemistry and Technology, 2023, 51(6): 776-782. doi: 10.19906/j.cnki.JFCT.2022074

Citation:

KANG Yu-shu, WANG Li-bao, LI Yong-zhi, BAI Jin, ZHANG Cai-shun, LIU Dao-sheng, ZHANG Lei, GAO Zhi-xian. Effect of hydrothermal synthesis time on the performance of Cu/Ce-Zr catalysts for catalytic water-gas shift reaction[J]. Journal of Fuel Chemistry and Technology, 2023, 51(6): 776-782. doi: 10.19906/j.cnki.JFCT.2022074

Citation:

KANG Yu-shu, WANG Li-bao, LI Yong-zhi, BAI Jin, ZHANG Cai-shun, LIU Dao-sheng, ZHANG Lei, GAO Zhi-xian. Effect of hydrothermal synthesis time on the performance of Cu/Ce-Zr catalysts for catalytic water-gas shift reaction[J]. Journal of Fuel Chemistry and Technology, 2023, 51(6): 776-782. doi: 10.19906/j.cnki.JFCT.2022074

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Effect of hydrothermal synthesis time on the performance of Cu/Ce-Zr catalysts for catalytic water-gas shift reaction

doi: 10.19906/j.cnki.JFCT.2022074

1.
School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China
2.
Chemical Operation Department, Sinopec Shijiazhuang Refining and Chemical Company, Shijiazhuang 050099, China
3.
Shenyang Ecological and Environmental Affairs Service Economic Development Zone sub-center, Shenyang 110000, China

Funds: The project was supported by the National Natural Science Foundation of China (21673270) and the Scientific Research Funds project of Education Department of Liaoning Province (L2019012)

Received Date: 2022-06-10
Accepted Date: 2022-09-20
Rev Recd Date: 2022-09-10

Available Online: 2022-09-26

Publish Date: 2023-06-15

Abstract

Abstract

Ce-Zr oxide support was hydrothermally synthesized from metal nitrates of cerium and zirconium as the raw materials using citric acid instead of alkali precipitant, and then Cu/Ce-Zr catalyst was prepared by the impregnation method. The support and catalyst samples were characterized by XRD, BET, H₂-TPR, XPS techniques, and the effects of different hydrothermal time on the structure, properties and performance in water-gas shift reaction were investigated. The results show that the catalyst activity is mainly related to the Cu specific surface area, reduction temperature of CuO and the number of oxygen vacancies on the catalyst surface. Among them, the Cu/Ce-Zr catalyst with hydrothermal time of 12 h has a large Cu specific surface area, a lower reduction temperature of CuO, and a large number of oxygen vacancies, so it shows a good catalytic activity. When the reaction temperature is 320 ℃, the molar ratio of water to gas (W/M) is 2, and the gas space velocity GHSV=6600 h⁻¹, the CO conversion rate is 96.9%, which is close to the thermodynamic equilibrium value of 97.1%.
- hydrothermal method,
- hydrothermal time,
- water gas shift,
- CeO₂-ZrO₂ solid solution

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References(24)

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