SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 36 ›› Issue (8): 190-198.DOI: 10.1016/j.cjche.2020.10.007

• Energy Science and Technology • 上一篇    下一篇

Energy and economic analysis of a hydrogen and ammonia co-generation system based on double chemical looping

Xin Pan, Jingjing Ma, Xiude Hu, Qingjie Guo   

  1. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • 收稿日期:2020-08-04 修回日期:2020-10-09 出版日期:2021-08-28 发布日期:2021-09-30
  • 通讯作者: Xiude Hu, Qingjie Guo
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (2018YFB0605401); the National Key Research and Development Program Project of Ningxia (2018BEE03009); the National Natural Science Foundation of China (21868025); and Major Program of Key Research and Development Program of Ningxia Province of China (2018BCE01002).

Energy and economic analysis of a hydrogen and ammonia co-generation system based on double chemical looping

Xin Pan, Jingjing Ma, Xiude Hu, Qingjie Guo   

  1. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2020-08-04 Revised:2020-10-09 Online:2021-08-28 Published:2021-09-30
  • Contact: Xiude Hu, Qingjie Guo
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2018YFB0605401); the National Key Research and Development Program Project of Ningxia (2018BEE03009); the National Natural Science Foundation of China (21868025); and Major Program of Key Research and Development Program of Ningxia Province of China (2018BCE01002).

摘要: In this work, a model of hydrogen production by double chemical looping is introduced. The efficiency benefit obtained was investigated. The chemical looping hydrogen generation unit is connected in series to the downstream of a chemical looping gasification unit as an additional system for 100 MW·h coal gasification, with the function of supplementary combustion to produce hydrogen. Using Aspen Plus software for process simulation, the production of H2 and N2 in the series system is higher than that in the independent Chemical looping gasification and Chemical looping hydrogen generation systems, and the production of hydrogen is approximately 25.63% and 12.90% higher, respectively; The study found that when the gasification temperature is 900℃, steam-carbon ratio is 0.84 and oxygen-carbon ratio is 1.5, the hydrogen production rate of the system was the maximum. At the same time, through heat exchange between logistics, high-pressure steam at 8.010×104 kg·h-1 and medium-pressure steam at 1.101×104 kg·h-1 are generated, and utility consumption is reduced by 61.58%, with utility costs decreasing by 48.69%. An economic estimation study found that the production cost of ammonia is 108.66 USD·(t NH3)-1. Finally, cost of equipment is the main factors influencing ammonia production cost were proposed by sensitivity analysis.

关键词: Chemical looping, Hydrogen, Ammonia, Energy evaluation, Economic evaluation

Abstract: In this work, a model of hydrogen production by double chemical looping is introduced. The efficiency benefit obtained was investigated. The chemical looping hydrogen generation unit is connected in series to the downstream of a chemical looping gasification unit as an additional system for 100 MW·h coal gasification, with the function of supplementary combustion to produce hydrogen. Using Aspen Plus software for process simulation, the production of H2 and N2 in the series system is higher than that in the independent Chemical looping gasification and Chemical looping hydrogen generation systems, and the production of hydrogen is approximately 25.63% and 12.90% higher, respectively; The study found that when the gasification temperature is 900℃, steam-carbon ratio is 0.84 and oxygen-carbon ratio is 1.5, the hydrogen production rate of the system was the maximum. At the same time, through heat exchange between logistics, high-pressure steam at 8.010×104 kg·h-1 and medium-pressure steam at 1.101×104 kg·h-1 are generated, and utility consumption is reduced by 61.58%, with utility costs decreasing by 48.69%. An economic estimation study found that the production cost of ammonia is 108.66 USD·(t NH3)-1. Finally, cost of equipment is the main factors influencing ammonia production cost were proposed by sensitivity analysis.

Key words: Chemical looping, Hydrogen, Ammonia, Energy evaluation, Economic evaluation