SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 37 ›› Issue (9): 79-88.DOI: 10.1016/j.cjche.2020.11.024

• Chemical Engineering Thermodynamics • 上一篇    下一篇

Liquid chemical looping gasification of biomass: Thermodynamic analysis on cellulose

Wei Guo1, Bo Zhang1, Jie Zhang1, Zhiqiang Wu1,2, Yaowu Li3, Bolun Yang1   

  1. 1. Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China;
    2. State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China;
    3. Nuclear Power Institute of China, Chengdu 610213, China
  • 收稿日期:2020-08-30 修回日期:2020-11-04 出版日期:2021-09-28 发布日期:2021-11-02
  • 通讯作者: Zhiqiang Wu
  • 基金资助:
    The authors gratefully acknowledge the support of the National Natural Science Foundation of China (22038011, 51976168), the K. C. Wong Education Foundation, China Postdoctoral Science Foundation (2019M653626), Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (2020-KF-06), the Promotion Plan for Young People of Shaanxi Association for Science and Technology (20180402), and the Technology Foundation for Selected Overseas Chinese Scholar in Shaanxi Province (2018015).

Liquid chemical looping gasification of biomass: Thermodynamic analysis on cellulose

Wei Guo1, Bo Zhang1, Jie Zhang1, Zhiqiang Wu1,2, Yaowu Li3, Bolun Yang1   

  1. 1. Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China;
    2. State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China;
    3. Nuclear Power Institute of China, Chengdu 610213, China
  • Received:2020-08-30 Revised:2020-11-04 Online:2021-09-28 Published:2021-11-02
  • Contact: Zhiqiang Wu
  • Supported by:
    The authors gratefully acknowledge the support of the National Natural Science Foundation of China (22038011, 51976168), the K. C. Wong Education Foundation, China Postdoctoral Science Foundation (2019M653626), Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (2020-KF-06), the Promotion Plan for Young People of Shaanxi Association for Science and Technology (20180402), and the Technology Foundation for Selected Overseas Chinese Scholar in Shaanxi Province (2018015).

摘要: Liquid chemical looping technology is an innovation of chemical looping conversion technology. Using liquid metal oxide as the oxygen carrier during gasification process could prolong the service life of oxygen carrier and improve the process efficiency. In this paper, based on Gibbs minimum free energy method, the thermodynamic characteristics of biomass liquid chemical looping gasification were studied. Cellulose and lignin, the main components of biomass, were taken as the research objects. Bismuth oxide and antimony oxide were selected as liquid oxygen carriers. The results showed that when the temperature increased from 600℃ to 900℃, the output of H2 and CO in the products of cellulose gasification increased from 0.5 and 0.3 kmol to 1.3 and 2.6 kmol respectively. Different ratios of oxygen carriers to gasification raw materials had the best molar ratio. The addition of steam in the system was beneficial to the increase of H2 content and the increase of H2/CO molar ratio. Bi2O3 and Sb2O3 with different mass ratios were used as mixed oxygen carriers. The simulation results showed that the gasification temperature of biomass with different mixed oxygen carriers had the same equilibrium trend products. It could be seen from the results of product distribution that the influence of the mixing ratio of Bi2O3 and Sb2O3 on gas product distribution could be neglected. These results could provide simulation reference and data basis for subsequent research on liquid chemical looping gasification.

关键词: Liquid chemical looping conversion, Biomass, Thermodynamics, Product distribution, Oxygen carrier, Simulation

Abstract: Liquid chemical looping technology is an innovation of chemical looping conversion technology. Using liquid metal oxide as the oxygen carrier during gasification process could prolong the service life of oxygen carrier and improve the process efficiency. In this paper, based on Gibbs minimum free energy method, the thermodynamic characteristics of biomass liquid chemical looping gasification were studied. Cellulose and lignin, the main components of biomass, were taken as the research objects. Bismuth oxide and antimony oxide were selected as liquid oxygen carriers. The results showed that when the temperature increased from 600℃ to 900℃, the output of H2 and CO in the products of cellulose gasification increased from 0.5 and 0.3 kmol to 1.3 and 2.6 kmol respectively. Different ratios of oxygen carriers to gasification raw materials had the best molar ratio. The addition of steam in the system was beneficial to the increase of H2 content and the increase of H2/CO molar ratio. Bi2O3 and Sb2O3 with different mass ratios were used as mixed oxygen carriers. The simulation results showed that the gasification temperature of biomass with different mixed oxygen carriers had the same equilibrium trend products. It could be seen from the results of product distribution that the influence of the mixing ratio of Bi2O3 and Sb2O3 on gas product distribution could be neglected. These results could provide simulation reference and data basis for subsequent research on liquid chemical looping gasification.

Key words: Liquid chemical looping conversion, Biomass, Thermodynamics, Product distribution, Oxygen carrier, Simulation