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Citation: MO Wen-long, XIAO Yan, MA Feng-yun, ZHONG Mei, LIU Jing-mei, Aisha·nulahong. Influence of calcination conditions on the performance of Ni-Al2O3 catalyst for CO methanation in slurry-bed reactor[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(1): 84-91. shu

Influence of calcination conditions on the performance of Ni-Al2O3 catalyst for CO methanation in slurry-bed reactor

  • Key Laboratory of Coal Clean Conversion & Chemical Engineering Process(Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China

  • Corresponding author: MA Feng-yun, ma_fy@126.com
  • Received Date: 25 August 2017
    Revised Date: 24 November 2017

    Fund Project: The project was supported by the National High Technology Research and Development Program of China (863 Program, 2015AA050502) and Natural Science Foundation of Xinjiang University (BS160221)the National High Technology Research and Development Program of China 863 Programthe National High Technology Research and Development Program of China 2015AA050502Natural Science Foundation of Xinjiang University BS160221

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  • Effects of calcination temperature and calcination time on the crystal structure, reduction characteristics, pore structure and CO methanation performance of Ni-Al2O3 catalyst were investigated by using a mechanical-chemical method to prepare Ni-Al2O3 catalyst. The catalysts were characterized by XRD, H2-TPR, BET, XPS and TPH. The results showed that the calcination temperature increased from 350℃ to 700℃, NiO was still well dispersed on the surface of the carrier, and the reduction peak temperature decreased to high temperature. The specific surface area of the cat-450 sample obtained by calcination at 450℃ was 350 m2/g. The results showed that with the calcination temperature increased from 350℃ to 700℃, CO conversion, CH4 selectivity and yield were increased first and then decreased, reaching the maximum at 450℃, with 97.8%, 88.2% and 86.2%, respectively. In addition, the calcination time has little effect on the reduction performance of the catalyst, and has small influence on the crystal structure of the carrier Al2O3. With the increase of calcination time, CO conversion decreased slightly and then increased with the better calcination time of 4 h.
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