Influence of calcination temperature on the structure and catalytic reforming performance of Ni/CaO-Al<sub>2</sub>O<sub>3</sub> catalyst

JING Jie-ying; ZHANG Zi-yi; WANG Shi-dong; LI Wen-ying

Volume 46 Issue 6

Jun. 2018

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JING Jie-ying, ZHANG Zi-yi, WANG Shi-dong, LI Wen-ying. Influence of calcination temperature on the structure and catalytic reforming performance of Ni/CaO-Al2O3 catalyst[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 673-679.

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JING Jie-ying, ZHANG Zi-yi, WANG Shi-dong, LI Wen-ying. Influence of calcination temperature on the structure and catalytic reforming performance of Ni/CaO-Al₂O₃ catalyst[J]. Journal of Fuel Chemistry and Technology, 2018, 46(6): 673-679.

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Influence of calcination temperature on the structure and catalytic reforming performance of Ni/CaO-Al₂O₃ catalyst

Training Base of State Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China

Funds:

National Natural Science Foundation of China 21406155

Natural Science Foundation of Shanxi Province 201701D221237

Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi 164010121-S

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Corresponding author: JING Jie-ying, Tel: 86-351-6018453, E-mail: jingjieying@tyut.edu.cn; LI Wen-ying, E-mail: ying@tyut.edu.cn
Received Date: 2018-03-30
Rev Recd Date: 2018-05-03

Available Online: 2021-01-23

Publish Date: 2018-06-10

Abstract

Abstract

Considering the tunable structure of hydrotalcite-like compounds, co-precipitation method was employed to synthesize Ni/CaO-Al₂O₃ composite catalysts. The influence of calcination temperature on the structure and catalytic reforming performance of Ni/CaO-Al₂O₃ catalyst investigated. The results showed that the specific surface area and Ni particle size of the as-synthesized composite catalysts were greatly affected by calcination temperature of the precursor derived from the variable interaction between the Ni and the support. When the calcination temperature was 700 ℃, the composite catalyst obtained a specific surface area of 21.42 m²/g and Ni particle size of 19.51 nm. The catalytic evaluation showed that the composite catalyst possessed a H₂ concentration of 98.31% and a CH₄ conversion of 94.87%, and H₂ concentration exceeded 97.35% even after 10 cyclic runs. The high catalytic activity was ascribed to the higher specific surface area, which provided more active sites and enhanced CO₂ sorption. The smaller Ni particle size improved the anti-sintering capacity of the composite catalyst, endowing the composite catalyst superior stability.
- hydrogen production,
- enhanced CO₂ sorption,
- composite catalyst,
- calcination temperature,
- hydrotalcite-like compounds

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References(22)

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