Thermogravimetric study of the effect of a PVA oxygen-insulating barrier on the spontaneous combustion of coal  

作　　者：MENG Xianhang CHU Ruizhi WU Guoguang XU Hongfeng ZHU Jiamei WANG Zhihua 

机构地区：[1]School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221008, China [2]Key Laboratory of Coal Processing and Efficient Utilization, China University of Mining & Technology, Ministry of Education, Xuzhou 221008, China

出　　处：《Mining Science and Technology》2010年第6期882-885,共4页矿业科学技术（英文版）

基　　金：support provided by the National Natural Science Foundation of China (No20807056);the Research Fund for the Doctoral Program of Higher Education of China (No20060290506);the Foundation of China University of Mining & Technology (Nos0H060097 and 0H080254)

摘　　要：Coal samples in the air for three months were characterized by Thermogravimetric Analysis (TGA). The effect of a PVA oxygen-insulating barrier on the spontaneous combustion of coal was examined. The moisture loss activation energy, oxidation activation energy and combustion activation energy were calculated by an integral method using the Coats-Redfen formula. The results show that the tendency for spontaneous combustion of three coal samples (judged by the activation energy) falls in the order: CYW>YJL>SW. The oxidation activation energy and combustion activation energy of coal protected by the PVA oxygen-insulating barrier increased. A significant increase in the combustion activation energy was noted, especially for the CYW coal where the in-crease was 28.53 kJ/mol. Hence, oxidation of the protected coal samples was more difficult. The PVA oxygen-insulating barrier helps to prevent spontaneous combustion of the coal.Coal samples in the air for three months were characterized by Thermogravimetric Analysis （TGA）. The effect of a PVA oxygen-insulating barrier on the spontaneous combustion of coal was examined. The moisture loss activation energy, oxidation activation energy and combustion activation energy were calculated by an integral method using the Coats-Redfen formula. The results show that the tendency for spontaneous combustion of three coal samples （judged by the activation energy） falls in the order： CYW〉YJL〉SW. The oxidation activation energy and combustion activation energy of coal protected by the PVA oxygen-insulating barrier increased. A significant increase in the combustion activation energy was noted, especially for the CYW coal where the increase was 28.53 kJ/mol. Hence, oxidation of the protected coal samples was more difficult. The PVA oxygen-insulating barrier helps to prevent spontaneous combustion of the coal.

关 键 词：coal spontaneous combustion oxygen-insulating barrier activation energy thermogravimetric analysis 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业] TD752.2[矿业工程—矿井通风与安全]