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.
出处
《过程工程学报》
CAS
CSCD
北大核心
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)
关键词
活性炭
无烟煤
CH4
N2
变压吸附
分离
activated carbon
anthracite
CH4/N2
pressure swing adsorption
separation
