Micro fluidized bed reaction analysis and its application to coal char gasification kinetics

ZENG Xi; WANG Fang; HAN Jiangze; ZHANG Juwei; LIU Yunyi; WANG Yin; YU Jian; XU Guangwen

doi:10.3969/j.issn.0438-1157.2013.01.032

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Micro fluidized bed reaction analysis and its application to coal char gasification kinetics

更新时间：2025-12-10

- Micro fluidized bed reaction analysis and its application to coal char gasification kinetics
- CIESC Journal Issue 1, Pages: 289-296(2013)
- 作者机构：
  
  1. 中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京,100190
  2. 沈阳化工大学化学工程学院,辽宁,沈阳,110142
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.01.032
  CLC： Q523.2
- Online First：05 January 2013，
  
  Published：05 January 2013
- 稿件说明：
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ZENG Xi, WANG Fang, HAN Jiangze, et al. Micro fluidized bed reaction analysis and its application to coal char gasification kinetics[J]. CIESC Journal, 2013, (1): 289-296.
DOI：

ZENG Xi, WANG Fang, HAN Jiangze, et al. Micro fluidized bed reaction analysis and its application to coal char gasification kinetics[J]. CIESC Journal, 2013, (1): 289-296. DOI： 10.3969/j.issn.0438-1157.2013.01.032.

摘要

在概述最新研发的微型流化床反应分析(micro-fluidized bed reaction analysis

MFBRA)方法与应用的基础上

应用该方法进一步研究了半焦-CO2、半焦-水蒸气等温气化反应动力学

并与热重分析(thermogravimetric analyzer

TGA)求取的气化反应动力学数据比较。在最小化气体扩散的实验条件下

利用MFBRA和TGA测定求算的半焦-CO2、半焦-水蒸气气化反应在受反应动力学控制的低温段的活化能非常接近

说明了MFBRA对等温气化反应分析的适用性和可靠性。实验研究还发现:半焦-CO2、半焦-水蒸气气化反应在MFBRA中受反应动力学控制的温度范围较在TGA中明显宽

且在具有明显扩散影响的高温段通过MFBRA测定的半焦-CO2气化反应表观活化能明显大于利用TGA测定的值

表明在MFBRA中受到的气体扩散抑制效应较小。

Abstract

After summarizing the newly developed micro-fluidized bed reaction analysis (MFBRA) and its existing applications

its application to the kinetics of isothermal gasification reaction between coal char and CO2/steam were further extended.The resulting kinetic data were compared with the measurements in thermogravimetric analyzer (TGA).Under minimized limitations of heat and mass transfer

the activation energy of char gasification with CO2 and steam in the kinetically controlled low temperature region was very close to that obtained from TGA

validating the reliability of MFBRA for the analysis of char gasification kinetics.Moreover

the temperature range of the kinetically controlled reaction region was found to be obviously wider in MFBRA than in TGA for both char-CO2 and char-steam reactions.At higher temperatures with evident limitations of heat and mass transfer on the reaction kinetics

the estimated activation energy was obviously higher with MFBRA than that with TGA.All of these further demonstrated that the diffusion limitation in MFBRA was weaker than that in TGA for gasification of coal char.

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