伊敏褐煤不同组分相互作用的热重-质谱分析
Analysis on theinteraction between different components of Yim in lignite by TG-MS technique
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摘要: 煤成烃及煤化作用一直是煤化学领域的核心问题，为深入理解煤成烃及煤化作用机制，选用伊敏原煤及其不同有机组分为研究对象，运用热重-质谱（TG-MS）联用系统，在详细分析伊敏煤6种不同有机组分的热解特征以及主要气态产物（H2、CH4、C2H6、CO2和苯）的在线析出行为的基础上，对不同有机组分的相互作用机制进行了深入探讨。原煤的热失重曲线及产物的生成曲线不是其不同有机组分热失重曲线和产物生成曲线的简单加和，表现为峰的个数和形状均存在较大差异，表明在热解过程中煤中不同有机组分间存在着相互作用。为进一步理解其相互作用机制，对不同有机组分间互不影响时各产物的逸出速率曲线进行了计算，详细分析了不同有机组分对不同气态产物生成的影响，结果显示：煤中的矿物质对H2、CH4及烷烃类的生成具有促进作用，对CO2的生成具有抑制作用，而对苯的生成影响不显著；腐植酸的存在促进了C2H6的生成，抑制了H2、CH4及苯的生成，对羧基裂解生成CO2的反应有抑制作用，而对稳定含氧官能团裂解生成CO2的反应有促进作用；沥青质对CO2的生成具有促进作用，对C2H6的生成具有抑制作用，对苯的生成没有明显影响。Abstract: It is well known that coal derived hydrocarbon and coalification are the fundamental subjects of coal chemistry. In order to deeply understand the mechanism of them,Yimin raw and its different organic components were analyzed by TG-MS technique,the characteristics of pyrolysis and evolution of main gaseous products(H2,CH4,C2H6,CO2 and benzene) were analyzed,based on which,the interaction mechanism between different organic components was investigated deeply. Both the numbers and the shape are different between each other,which indicating the existence of the interaction between different organic components during the pyrolysis process. In order to further understand the interaction mechanism,the non-interaction generation curves of each product were calculated,based on which,the effects of different organic components on the formation of different gaseous products were analyzed. The results indicated that the minerals promote the evolution of H2,CH4 and alkanes,and inhibit the emission of CO2 and have no significant effect on the generation of benzene. The presence of humic acid has promotional effect on the production of C2H6 and CO2 from stable oxygen-containing functional groups,but inhibit the generation of H2,CH4,benzene and CO2 from carboxyl groups. The asphaltenes inhibit the generation of C2H6 and promote that of CO2,and it has no influence on the evolution of benzene.
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Keywords:
- Yimin lignite /
- organic components /
- TG-MS /
- coal pyrolysis
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期刊类型引用(3)
1. 杨婷. 基于热重-质谱联用技术的兰炭与木炭燃烧特性研究. 上海化工. 2025(01): 22-26 . 
百度学术
2. 林建功，张孝禹，惠吉成，朱书骏，朱建国. 煤矸石与气化飞灰的热重-质谱混燃机理. 煤炭学报. 2024(11): 4634-4645 . 百度学术
3. 王小令，王绍清，陈昊，赵云刚，沙吉顿，李慷. 不同镜惰比低阶煤的结构特征及其热解行为. 煤炭科学技术. 2023(05): 294-301 . 本站查看
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