无烟煤所制活性炭对CH_4/N_2的分离特性  

Characteristics of Activated Carbon Prepared with Anthracite for Separation of CH_4 and N_2 Mixture

作　　者：张薄[1] 辜敏[1] 鲜学福[1] 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400044

出　　处：《过程工程学报》2012年第5期888-892,共5页The Chinese Journal of Process Engineering

基　　金：重庆市科委科技计划项目院士专项基金资助项目(编号:CSTC;2010BC6006)

摘　　要：以无烟煤为原料,采用预氧化炭化水蒸气活化法制备颗粒活性炭,用其变压吸附分离CH4/N2,以重量法测定了298K下N2和CH4单组分及双组分气体在活性炭上的等温吸附曲线,并对活性炭的结构和表面性质进行了表征.结果表明,以所制活性炭为吸附剂,采用单柱单循环变压吸附过程可将CH4/N2中CH4浓度最高提升30.7%(φ).所制活性炭孔结构以微孔为主且表面具有较多含氧官能团,对CH4/N2的分离效果较好,吸附选择性系数达3.4.Granular activated carbon （GAC） was prepared by preoxidation--carbonization-vapor activation process using anthracite as raw material. The adsorption isotherms of CH4, N2 and CHa/N2 mixture were measured and the pore size distribution, surface functional group and crystal structure of GAC characterized. The results show that by a pressure swing adsorption process using single column and single cycle with the prepared GAC as adsorbent, the volume percentage of CH4 was increased by 30.7% maximally. The effective micropores for separation of CH4/N2 mixture occupied a great proportion. The oxygen-containing function groups on the surface of GAC were favorable for the separation of CHa/N2. The adsorption selective coefficient of CH4 on GAC was 3.4.

关 键 词：活性炭 无烟煤 CH4 N2 变压吸附 分离 

分 类 号：TU996[建筑科学—供热、供燃气、通风及空调工程]