Characteristics of coal re-oxidation based on microstructural and spectral observation  

作　　者：Liang Yuntao Tian Fuchao Luo Haizhu Tang Hui 

机构地区：[1]School of Safety Engineering,China University of Mining & Technology [2]State Key Laboratory of Coal Mine Safety Technology,China Coal Technology & Engineering Group of Shenyang Research Institute

出　　处：《International Journal of Mining Science and Technology》2015年第5期749-754,共6页矿业科学技术学报（英文版）

基　　金：the National Key Foundation for Exploring Scientific Instruments of China(No.2012YQ24012705);the National Natural Science Foundation of China(No.51174113);the special fund for Scientific Research Institutes of China(Nos.2013EG122192 and 2014EG122293);CCTEG Innovation Foundation of China(No. 2014MS030);Shenhua Innovation Foundation of China(No. SHGF-13-07)

摘　　要：In order to investigate the characteristics of re-oxidation of residual coal in goafs in close coal seam mining,scanning electron microscope and infrared spectrometer are used to study the changes of coal microstructure and chemical reaction of functional groups of eight coal samples at different ranks.Result shows that after initial oxidation,the surface morphology of pore are different,and the porosity of coal is increased and the oxygen adsorption capacity of coal is improved.The change of coal molecular structure and presence of a large amount of active oxygen-containing functional groups lead to increasing tendency of coal to further oxidation.In addition,the higher lever of the initial oxidation is,the easier the re-oxidation occurs.In order to investigate the characteristics of re-oxidation of residual coal in goafs in close coal seam mining,scanning electron microscope and infrared spectrometer are used to study the changes of coal microstructure and chemical reaction of functional groups of eight coal samples at different ranks.Result shows that after initial oxidation,the surface morphology of pore are different,and the porosity of coal is increased and the oxygen adsorption capacity of coal is improved.The change of coal molecular structure and presence of a large amount of active oxygen-containing functional groups lead to increasing tendency of coal to further oxidation.In addition,the higher lever of the initial oxidation is,the easier the re-oxidation occurs.

关 键 词：Spontaneous combustion of coal RE-OXIDATION Oxidation characteristics Microstructure Infrared spectrum 

分 类 号：TQ533[化学工程—煤化学工程] O657.3[理学—分析化学]