Sorption Properties of Hard Coals with Regard to Gases Present in the Mine Atmosphere

作     者：agnieszka dudzińska 

作者机构：Mines Ventilation Department Central Mining Institute 40-166 Katowice Poland 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2017年第28卷第1期

页      面：124-130页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by the Statutory Research Registered in Central Mining Institute in Katowice (No.11220255) 

主　　题：coal sorption gas. 

摘      要：In this study, the sorption capacities of hard coals with reference to gases present in the mine atmosphere： carbon dioxide, methane, ethane, ethene, propane, propene, carbon monoxide and hydrogen were examined. For laboratory tests, 4 samples of hard coals collected from exploitable coal seams were selected. Among considered gases the mostly sorbed is carbon dioxide, in slightly smaller amounts are sorbed unsaturated hydrocarbons： ethene and propene. Their large sorption results from i.a. interactions of ？ electrons in the double bond between carbon atoms in the ethene or propene molecules with energetic centers of the coal surface. The amounts of the sorbed saturated hydrocarbons： ethane and propane are small, which is probably related to the adsorption mechanism of their sorption by coals. In the smallest amounts are sorbed hydrogen and carbon monoxide, the values of their sorption being maximum 5% of hard coals sorption capacity in relation to carbon dioxide. Based on the experiments it was found that the largest amounts of gases are sorbed by lowrank, highly porous coals with high oxygen content. The process of sorption of unsaturated hydrocarbons： ethene and propene can lead to a reduction in concentration of those gases in the mine atmosphere and thus may affect correctness of the self-heating phenomenon assessment.