Evaluation and application of pyrolysis kinetic model of Wucaiwan coal and Tulufan coal

Liping WEI; Guodong JIANG; Yukuan GU; Haipeng TENG

doi:10.11949/0438-1157.20190441

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Evaluation and application of pyrolysis kinetic model of Wucaiwan coal and Tulufan coal

Catalysis, kinetics and reactors | 更新时间：2020-06-24

- Evaluation and application of pyrolysis kinetic model of Wucaiwan coal and Tulufan coal
- CIESC Journal Vol. 70, Issue S2, Pages: 275-286(2019)
- 作者机构：
  
  1.西北大学化工学院，陕北能源先进化工利用技术教育部工程研究中心，陕西西安 710069
  2.中国电子科技集团公司第三十九研究所，陕西西安 710065
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190441
  CLC： TQ 530.2
- Received：26 April 2019，
  
  Revised：2019-05-24，
  
  Published：05 September 2019
- 稿件说明：
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魏利平, 江国栋, 古玉宽, 滕海鹏. 五彩湾煤和吐鲁番煤热解动力学模型评估与应用[J]. 化工学报, 2019, 70(S2): 275-286

WEI Liping, JIANG Guodong, GU Yukuan, TENG Haipeng. Evaluation and application of pyrolysis kinetic model of Wucaiwan coal and Tulufan coal[J]. CIESC Journal, 2019, 70(S2): 275-286
魏利平, 江国栋, 古玉宽, 滕海鹏. 五彩湾煤和吐鲁番煤热解动力学模型评估与应用[J]. 化工学报, 2019, 70(S2): 275-286 DOI： 10.11949/0438-1157.20190441.

WEI Liping, JIANG Guodong, GU Yukuan, TENG Haipeng. Evaluation and application of pyrolysis kinetic model of Wucaiwan coal and Tulufan coal[J]. CIESC Journal, 2019, 70(S2): 275-286 DOI： 10.11949/0438-1157.20190441.

摘要

煤热解是煤热加工利用的基础反应，热解动力学模型有助于预测煤在热解过程中挥发分脱除规律，当前文献中已报道了多种热解动力学模型，厘清不同热解模型参数选择的差异，评估不同模型对煤种及热解反应适应性可为热解工艺设计提供参考。采用

C NMR核磁共振测量了五彩湾煤和吐鲁番煤的碳化学结构，并使用热重法测量了不同加热速率下的两种低阶煤失重曲线，结合分段式单一速率扫描法、等转化率法和3段式高斯分布活化能模型（3-DAEM）分析热重实验数据。结果表明单一速率扫描法得出的动力学参数难以准确揭示热解反应机理；等转化率法可以较好地得出热解活化能及指前因子分布图；将等转化率方法获得的指前因子赋值给分布活化能模型，可以避免分布活化能模型指前因子选择的盲目性；3-DAEM模型仅需要一条TGA曲线便可获得适用于整个加热速率的动力学参数，其预测结果与实验数据吻合最好，且模拟得出的活化能分布图很好地反映了煤热解三个阶段特征。

Abstract

To clarify the differences in parameters selection of different pyrolysis models and evaluate the adaptability of different models to pyrolysis reaction

the segmented single scanning rate method

iso

-conversion kinetic method and the 3-stage Gaussian distribution activation energy model (3-DAEM) were applied to analyze the thermogravimetric experimental data of two low-rank coal. The results show that the kinetic parameters obtained by single scanning rate method cannot reveal the pyrolysis reaction mechanism well. The

iso

-conversion kinetic method can better obtain the activation energy and pre-exponential factor distribution. The data simulated by 3-DAEM fits best with experimental data

and only one TGA curve is needed to obtain the kinetic parameters suitable for the TGA curve at other heating rates. According to the activation energy distribution

coal pyrolysis can be divided into three stages corresponding to the three classes of dominant chemical bonds.

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