物化结构对胜利褐煤自燃倾向性的影响  

Effect of Physical and Chemical Structure of Shengli Lignite on Its Spontaneous Combustion Tendency

作　　者：高琳 莫琼 廖俊杰[1] 常丽萍[1] 鲍卫仁[1] GAO Lin;MO Qiong;LIAO Junjie;CHANG Liping;BAO Weiren(Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学煤科学与技术教育部重点实验室,太原030024

出　　处：《太原理工大学学报》2021年第4期571-577,共7页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(21676177)。

摘　　要：选用胜利褐煤为研究对象,在140℃和160℃、空气气氛下氧化不同时间,制得一系列氧化煤样。采用傅里叶变换红外光谱和氮吸附法对煤样的官能团以及孔结构参数进行了分析测试,采用篮热法对氧化煤样的临界自燃温度进行了测定,对自燃动力学参数进行了计算,探讨了褐煤物化结构对临界自燃温度的影响。结果表明:褐煤中活性基团在氧化自燃过程中起主导作用,烷基侧链基团与含氧官能团含量越高,其自燃倾向性越大。煤样孔结构也是影响自燃倾向性的因素,比表面积、孔体积越大,其暴露出的活性位点越多,越容易发生自燃。A series of oxidized coal samples were prepared by oxidation of Shengli lignite in air at 140℃and 160℃for different time.The functional groups and pore structure parameters of coal samples were analyzed and tested by Fourier transform infrared spectroscopy and nitrogen adsorption method.The critical ignition temperature of the oxidized coal samples was measured by the basket heat method.The spontaneous combustion kinetic parameters were calculated,and the influence of lignite physical and chemical structure on the critical spontaneous combustion temperature was discussed.The active groups in lignite play a leading role in the process of oxidative spontaneous combustion.The higher the content of alkyl side chain groups and oxygen-containing functional groups,the greater the tendency of spontaneous combustion.The pore structure of coal samples is also a factor that affects the tendency of spontaneous combustion.The larger the specific surface area and pore volume,the more active sites expose,and the more likely spontaneous combustion occurs.

关 键 词：褐煤 自燃倾向性 临界自燃温度 化学结构 孔结构 

分 类 号：TQ530.2[化学工程—煤化学工程]