Analysis and Optimization of Autothermal Operation Parameters for Semi-Coke Chemical Looping Gasification System

GUAN Yu; SONG Huchao; LIN Xiaolong; WANG Bo; LIU Yinhe

doi:10.7652/xjtuxb202508015

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Analysis and Optimization of Autothermal Operation Parameters for Semi-Coke Chemical Looping Gasification System

更新时间：2025-07-30

- Analysis and Optimization of Autothermal Operation Parameters for Semi-Coke Chemical Looping Gasification System
- Journal of Xi’an Jiaotong University Vol. 59, Issue 8, Pages: 158-167(2025)
- 作者机构：
  
  1.西安交通大学绿色氢电全国重点实验室， 710049，西安
  2.西安交通大学能源与动力工程学院， 710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202508015
  CLC： TQ546
- Received：25 January 2025，
  
  Online First：11 April 2025，
  
  Published：10 August 2025
- 稿件说明：
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GUAN Yu, SONG Huchao, LIN Xiaolong, et al. Analysis and Optimization of Autothermal Operation Parameters for Semi-Coke Chemical Looping Gasification System[J]. Journal of Xi’an Jiaotong University, 2025, 59(8): 158-167.
DOI：

GUAN Yu, SONG Huchao, LIN Xiaolong, et al. Analysis and Optimization of Autothermal Operation Parameters for Semi-Coke Chemical Looping Gasification System[J]. Journal of Xi’an Jiaotong University, 2025, 59(8): 158-167. DOI： 10.7652/xjtuxb202508015.

摘要

为实现兰炭高效清洁利用，提出了一种自热式兰炭化学链气化制合成气工艺系统。基于吉布斯自由能最小化原理及能量和质量守恒定律，建立了处理能力为2 000 t·d

－1

的兰炭化学链气化模型，并通过实验数据验证了模型的准确性。研究了气化反应器温度、空气反应器温度和水碳摩尔比等因素对系性能的影响，确定了兰炭化学链反应系统的最佳自热运行条件，并与常规兰炭气化的热效率进行了对比。研究结果表明，当兰炭的给料量为83.33 t·h

－1

时，兰炭化学链气化系统的最佳自热运行条件如下：水蒸气流量为108.99 t·h

－1

，兰炭燃料气化反应器温度为900 ℃，空气反应器温度为1 000 ℃，空气流量为247.25 t·h

－1

，载氧体CaSO

/Fe

与兰炭给料量的质量比为1.92，载热体Al

与载氧体CaSO

/Fe

的质量比为16.29。此时，合成气的质量流量为80.13 t·h

－1

，合成气的产率为1 700 cm

·kg

－1

。整体上，兰炭化学链气化系统的热效率为83.81%，高于常规兰炭气化系统的热效率80.51%，主要归因于其省去了空分制氧过程，表现出显著的性能优势和发展潜力。研究结果可为兰炭化学链气化的工业应用提供一定的参考。

Abstract

To achieve efficient and clean utilization

of semi-coke

an autothermal chemical looping gasification system for syngas production from semi-coke is proposed. Based on the principle of Gibbs free energy minimization and the laws of energy and mass conservation

a chemical looping gasification model with a processing capacity of 2 000 t·d

-1

is established and validated with experimental data. The effects of key parameters

including gasifier temperature

air reactor temperature

and steam-to-carbon molar ratio

on system performance are investigated. The optimal autothermal operating conditions for the semi-coke chemical looping gasification system are determined and compared with conventional semi-coke gasification in terms of thermal efficiency. The results demonstrate that under a semi-coke feeding rate of 83.33 t·h

－1

the optimal autothermal operating conditions are: steam flow rate of 108.99 t·h

－1

gasifier temperature of 900 ℃

air reactor temperature of 1 000 ℃

air flow rate of 247.25 t·h

－1

mass ratio of oxygen carrier (CaSO

/Fe

) to semi-coke feed of 1.92

and mass ratio of heat carrier (Al

) to oxygen carrier of 16.29. Under these conditions

the system achieves a syngas mass flow rate of 80.13 t·h

－1

with a production yield of 1 700 cm

·kg

－1

. The overall thermal efficiency of the chemical looping gasification system reaches 83.81%

significantly higher than the 80.51% efficiency of conventional semi-coke gasification

primarily due to the elimination of the air separation unit for oxygen production. This demonstrates notable performance advantages and development potential. The findings provide important references for industrial applications of semi-coke chemical looping gasification.

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