Abstract: A micropore activated carbon (AC-1) with 1943m2/g specific surface area and an activated carbon (AC-2) with 1567m2/g specific surface area and 47.18% mesopores were prepared. Adsorption isotherms of CO2，CH4，N2 and O2 on AC-1 and AC-2 were determined at 298K and the adsorption separation properties of the activated carbons for the mixtures of CO2/N2，CO2/CH4 and CH4/N2 were discussed. The results showed that the pore structure was the main factor affecting the adsorption separation properties of the activated carbons. AC-2 which with many mesopores was more suitable for the adsorptive separation of the mixtures of CO2/N2，CO2/CH4 than AC-1 with only micropores，while AC-1 was more suitable for the adsorptive separation of CH4/N2 than AC-2.

摘要： 制备了比表面积为1943 m2/g的纯微孔活性炭AC-1和比表面积为1567 m2/g，中孔比例为47.18%的活性炭AC-2。分别以AC-1及AC-2为吸附剂测定CO2、CH4、N2和O2的298 K吸附等温线，考察了两种活性炭对CO2/N2、CO2/CH4 及 CH4/N2气体混合物的吸附分离性能。实验结果表明，孔结构是影响吸附剂吸附分离性能的主要因素。富中孔活性炭AC-2较AC-1更适用于CO2/N2、CO2/CH4气体混和物的吸附分离，而微孔活性炭AC-1对CH4/N2混合体系的吸附分离性能优于AC-2。