Chinese Journal of Chemical Engineering ›› 2021, Vol. 29 ›› Issue (1): 326-334.doi: 10.1016/j.cjche.2020.05.017

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Simulation study on the gasification process of Ningdong coal with iron-based oxygen carrier

Fei Xie, Mei An, Ping Li, Xiude Hu, Hongcun Bai, Qingjie Guo   

  1. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2020-02-10 Revised:2020-05-08 Online:2021-01-28 Published:2021-04-02
  • Contact: Ping Li
  • Supported by:
    This study was supported by the Key Research and Development Program of Ningxia (2018 BCE01002), and the Discipline Project of Ningxia (NXYLXK2017A04).

Abstract: Chemical looping gasification (CLG) of Ningdong coal by using Fe2O3 as the oxygen carriers (OCs) was studied, and the gasification characteristics were obtained. A computation fluid dynamics (CFD) model based on Eulerian‐-Lagrangian multiphase framework was established, and a numerical simulation the coal chemical looping gasification processes in fuel reactor (FR) was investigated. In addition, the heterogeneous reactions, homogeneous reactions and Fe2O3 oxygen carriers' reduction reactions were considered in the gasification process. The characteristics of gas flow and gasification in the FR were analyzed and it was found that the experiment results were consistent with the simulation values. The results show that when the O/C mole rate was 0.5:1, the gasification temperature was 900 ℃ and the water vapor volume flow rate was 2.2 ml·min-1, the mole fraction of syngas reached a maximum value of the experimental result and simulation value were 71.5% and 70.2%, respectively. When the O/C mole rate was 0.5:1, the gasification temperature was 900 ℃, and the water vapor volume flow was 1.8 ml·min-1; the gasification efficiency reached the maximum value was 62.2%, and the maximum carbon conversion rate was 84.0%.

Key words: Chemical looping gasification, Fuel reactor, Gasification characteristics, Fe2O3 oxygen carrier