Effect of aluminum proportion on the Cu/ZnO/Al<sub>2</sub>O<sub>3</sub> methanol-synthesis catalyst

ZHANG Fan; FENG Bo; DUAN Xue-lei; LI Jing; CHEN Jing-yun; ZHANG Yu-long; SUN Qi

Volume 47 Issue 3

Mar. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(3): 323-328

ZHANG Fan, FENG Bo, DUAN Xue-lei, LI Jing, CHEN Jing-yun, ZHANG Yu-long, SUN Qi. Effect of aluminum proportion on the Cu/ZnO/Al2O3 methanol-synthesis catalyst[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 323-328.

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ZHANG Fan, FENG Bo, DUAN Xue-lei, LI Jing, CHEN Jing-yun, ZHANG Yu-long, SUN Qi. Effect of aluminum proportion on the Cu/ZnO/Al₂O₃ methanol-synthesis catalyst[J]. Journal of Fuel Chemistry and Technology, 2019, 47(3): 323-328.

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Effect of aluminum proportion on the Cu/ZnO/Al₂O₃ methanol-synthesis catalyst

National Institute of Clean-and-Low-Carbon Energy, Beijing 102211, China

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The project was supported by the Methanol-synthesis Catalyst Research Project supported by CHN ENERGY group CF9300162131

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Corresponding author: ZHANG Yu-long, Tel: 010-57339689, E-mail: zhangyulong@nicenergy.com
Received Date: 2018-11-21
Rev Recd Date: 2019-01-17

Available Online: 2021-01-23

Publish Date: 2019-03-10

Abstract

Abstract

The objective of this work is to investigate the effect of Al contents on the performance of methanol-synthesis catalysts. A series of catalyst samples with various Al contents were prepared with fractional precipitation method, and characterized with methods including XRD, TG-MS, XRF, N₂ physisorption and H₂-TPR. Results show that Al addition affected the subcarbonate structure in precursors, which promoted the formation of high temperature carbonates, and thus has an effect on the catalyst performance. With Al addition, the BET surface area of the calcined catalysts, catalyst activity and thermostability increased to different degrees. When the molar ratio of Al³⁺ in catalyst increased to 30%, the CO conversions before and after heat treatment were 76% and 67%, respectively, at the conditions of 230 ℃, 4 MPa and syngas composition of 13%CO, 1.2%CO₂, 80%H₂ and 5.8%Ar. The catalyst sample with 0.3 of Al³⁺/(Cu²⁺+Zn²⁺+Al³⁺) molar ratio remains good catalyst performance.
- Al contents,
- high temperature carbonates,
- thermostability,
- malachite decomposition

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References(21)

References

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