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High thermal stability Si-Al based N-carrier for efficient and stable chemical looping ammonia generation

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  • Xiong, Chuhao
  • Wu, Ye
  • Feng, Mingqian
  • Fang, Jing
  • Liu, Dong
  • Shen, Laihong
  • Argyle, Morris D.
  • A. M. Gasem, Khaled
  • Fan, Maohong

Abstract

Chemical looping ammonia generation (CLAG) is a promising NH3 production technology due to its potential for high yield of NH3 and low CO2 emission footprint. However, the stabilities of the existing N-carriers are problematic during the cyclic N-sorption/desorption. This research was designed to overcome that challenge through use of elemental doping and depositing the N-carrier on a support. The experimental results show that the N-sorption/desorption performance of γ-Al2O3 N-carriers decreased with cycling due to the deterioration of the pore structure and phase transformation. A Si-modified alumina-based N-carrier, with a Si: Al molar ratio of 1:20 prepared by co-precipitation, was much more resistant to high-temperature phase transition and collapse of pore structure, resulting in highly stable cyclic N-sorption/desorption performance. Use of ZrO2 as a support for the Si-modified Al-based N-carrier further reduced NH3 decomposition and thus increased the NH3 yield and selectivity by 85.6% and 53.6% compared to that obtained with the pure γ-Al2O3 N-carrier.

Suggested Citation

  • Xiong, Chuhao & Wu, Ye & Feng, Mingqian & Fang, Jing & Liu, Dong & Shen, Laihong & Argyle, Morris D. & A. M. Gasem, Khaled & Fan, Maohong, 2022. "High thermal stability Si-Al based N-carrier for efficient and stable chemical looping ammonia generation," Applied Energy, Elsevier, vol. 323(C).
    • Handle: RePEc:eee:appene:v:323:y:2022:i:c:s0306261922008406
    DOI: 10.1016/j.apenergy.2022.119519
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    References listed on IDEAS

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    1. Wenbo Gao & Jianping Guo & Peikun Wang & Qianru Wang & Fei Chang & Qijun Pei & Weijin Zhang & Lin Liu & Ping Chen, 2018. "Production of ammonia via a chemical looping process based on metal imides as nitrogen carriers," Nature Energy, Nature, vol. 3(12), pages 1067-1075, December.
    2. Lee Pereira, Reinaldo Juan & Argyris, Panagiotis Alexandros & Spallina, Vincenzo, 2020. "A comparative study on clean ammonia production using chemical looping based technology," Applied Energy, Elsevier, vol. 280(C).
    3. Wang, Xiaoyu & Su, Mingze & Zhao, Haibo, 2021. "Process design and exergy cost analysis of a chemical looping ammonia generation system using AlN/Al2O3 as a nitrogen carrier," Energy, Elsevier, vol. 230(C).
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    Cited by:

    1. Xiong, Chuhao & Wu, Jin & Ji, Zhengang & Wu, Ye & Liu, Dong, 2024. "Unraveling the role of alkali metal in the biochar for enhancing the chemical looping ammonia generation efficiency," Renewable Energy, Elsevier, vol. 220(C).

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