煤吸附硫化氢混合气体的试验研究

Experimental study on adsorption of hydrogen sulfide gas mixture by coal

为研究煤层硫化氢(H_(2)S)吸附特性,厘清煤层H_(2)S赋存规律及改善H_(2)S防治效果,采用分压测试法研究煤对H_(2)S的吸附规律。以山西保利铁新煤业有限公司9#煤为研究对象,分别使用N_(2),He/H_(2)S,N_(2)/H_(2)S为吸附介质开展等温吸附试验,分析煤对H_(2)S及含H_(2)S混合气体的吸附特性及影响因素。结果表明:煤对H_(2)S的吸附量随压力升高而增加,随温度升高而降低,且温度对煤吸附H_(2)S吸附量影响较大;H_(2)S及N_(2)/H_(2)S混合气体的吸附曲线均符合Langmuir吸附模型,煤吸附N_(2)/H_(2)S混合气体时,H_(2)S和N_(2)存在竞争吸附,且N_(2)吸附能力优于H_(2)S;等温条件下,N_(2)竞争吸附量随吸附压力的增加而增大,等压条件下,N_(2)的竞争吸附量受温度影响较小。

In order to study the adsorption characteristics of hydrogen sulfide(H_(2)S)in coal seam for clarifying the occurrence law of H_(2)S in coal seam and improving the control effect of H_(2)S,the partial pressure test method was used to study the adsorption laws of coal to H_(2)S by using the H_(2)S gas mixture.Taking No.9 coal of Shanxi Baoli Tiexin Coal Industry Co.,Ltd.,as the research object,the isothermal adsorption experiments were carried out by using N_(2),He/H_(2)S and N_(2)/H_(2)S as the adsorption media respectively,and the adsorption characteristics and influencing factors of coal for H_(2)S and gas mixture containing H_(2)S were analyzed.The results showed that the adsorption amount of H_(2)S by coal increased with the increase of pressure and decreased with the increase of temperature,and the temperature had greater influence on the adsorption amount of H_(2)S by coal.Both the adsorption curves of H_(2)S and N_(2)/H_(2)S gas mixture were consistent with Langmuir adsorption model.When the coal adsorbed N_(2)/H_(2)S gas mixture,there was competitive adsorption between H_(2)S and N_(2),and the adsorption capacity of N_(2)was better than that of H_(2)S.Under the isothermal condition,the competitive adsorption amount of N_(2)increased with the increase of adsorption pressure.Under the isobaric condition,the competitive adsorption amount of N_(2)was less affected by the temperature.