褐煤氧化升温中含氧基团的变化规律  

Change Rules of Oxygen-containing Group in the Oxidation and Temperature Rise of Lignite

作　　者：姬玉成 张英华[1] 王辉[1] 黄志安[1,2,3,4] 邵振鲁 高玉坤[1] 尹义超[1] 木拉里·马扎甫 JI Yucheng;ZHANG Yinghua;WANG Hui;HUANG Zhian;SHAO Zhenlu;GAO Yukunx;YIN Yichao;MULALI Mazhafu(State Key Laboratory of High-Efficient Mining and Safety of Metal Mines(University of Science and Technology Beijing),Ministry of Education,Beijing 100083,China;Key Laboratory of Gas and Fire Control for Coal Mines(China Univers让y of Mining and Technology),Ministry of Education,Xuzhou,Jiangsu 221116,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control(Henan Polytechnic University),Jiaozuo,Henan 454000,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines(Hunan University of Science and Technology),Xiangtan,Hunan 411201,China;School of Safety Science and Technology,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830000,China)

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州市221116 [3]河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地,河南焦作市454000 [4]湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭市411201 [5]新疆工程学院安全科学与工程学院,新疆乌鲁木齐830000

出　　处：《矿业研究与开发》2020年第8期75-80,共6页Mining Research and Development

基　　金：新疆维吾尔自治区青年科学基金(2014211B013).

摘　　要：煤分子中的含氧基团是发生煤氧复合反应,引起煤炭自燃灾害的关键因素。通过原位傅里叶红外光谱试验,对褐煤氧化升温过程中的含氧基团变化进行了定性和定量分析,研究煤氧复合反应过程中含氧基团的变化规律。结果表明:低温氧化过程中,褐煤中羟基含氧官能团是参与早期30℃~80℃范围煤氧复合反应的关键含氧官能团,含氧官能团中其化学活性最高,特征吸收峰强度下降幅度最大,220℃时,下降幅度超过了70%;羧基、羰基、脂肪醚基和芳香醚基等4类含氧官能团含量随温度升高而升高,上升幅度依次:羰基>羧基>脂肪醚>芳香醚。煤氧复合反应的低温阶段20℃~220℃为高温阶段积累了大量的羧基、羰基化合物等中间过渡产物。The oxygen-containing group in coal molecule is the key factor of coal oxidation reaction causing coal spontaneous combustion.Through in-situ Fourier transform infrared spectroscopy experiments,the changes of oxygen-containing groups in the oxidation and temperature rise of lignite were qualitatively and quantitatively analyzed,and the change rules of oxygencontaining groups in the process of coal oxidation reaction were studied.The results show that:in the process of lowtemperature oxidation,the hydroxyl oxygen-containing groups in lignite are the key oxygen-containing groups participating in the early coal oxidation reaction in the temperature range of 30℃~80℃.Among the oxygen-containing groups,its chemical activity is the highest,and the characteristic absorption peak intensity decreases mostly by more than 70%at 220℃.The content of four oxygen-containing groups,such as carboxyl,carbonyl,fatty ether and aromatic ether groups,increases with temperature rise.The increase order from more to less was carbonyl>carboxyl>fatty ether>aromatic ether.The lowtemperature stage(20℃~220℃)of coal oxidation reaction accumulated a large amount of intermediate transition products such as carboxyl and carbonyl compounds for the high-temperature stage.

关 键 词：褐煤 低温氧化 含氧基团 温度 红外光谱试验 

分 类 号：TD531[矿业工程—矿山机电]