摘要
为研究煤体表面酸液改性对瓦斯吸附特性的影响,通过酸液浸泡方式对煤样进行改性。采用等温吸附仪对各改性煤样瓦斯吸附规律开展实验研究,并利用高压压汞仪测试各煤样的孔隙结构特征。研究结果表明:酸液改性对煤体孔隙结构有显著影响,酸化作用能够打通煤体内部孔隙,煤样经酸液浸泡后其吸附孔数量减少,中孔和大孔数量增加;随着酸液浸泡时间的增加,煤体瓦斯吸附能力曲线呈现先快后慢的非线性变化;酸液作用下,煤体瓦斯吸附能力减小,吸附速率降低。
In order to study the effect of surface acid modification on gas adsorption characteristics of coal,the coal sample was modified by soaking with acid.The gas adsorption law of modified coal samples was studied by isothermal adsorption instrument,and the pore structure characteristics of each coal sample were tested by high pressure mercury injection instrument.The research results show that acid modification has a great influence on the coal pore structure,and the acidification can connectinternal pores of coal,after soaking by acid,the number of adsorption pores of coal sample decrease and the number of medium and large pores of coal sample increase.With the increase of soaking time of acid solution,the gas adsorption capacity of coal presents a nonlinear change of first fast and then slow;under the action of acid liquid,the adsorption capacity of coal gas declines and the adsorption rate reduces.
作者
马永元
MA Yongyuan(Shanxi Coal Transportation and Sales Group Shouyang Hengyuan Coal Industry Co.,Ltd.,Jinzhong 030600,China)
出处
《矿业安全与环保》
北大核心
2018年第6期25-28,共4页
Mining Safety & Environmental Protection
关键词
煤
酸液改性
瓦斯吸附
孔隙结构
影响机理
coal
acid modification
gas adsorption
pore structure
influencing mechanism
作者简介
马永元(1973—),男,山西寿阳人,工程师,主要从事煤矿开采、瓦斯治理等方面的研究工作。E-mail:1220931431@ qq. com。
