沉积温度对CH_4/N_2分离用碳分子筛性能的影响

Deposition Temperature Affected to Performance of Carbon Molecular Sieve Applied to CH_4/N_2 Separation

为给用于分离CH4/N2的碳分子筛制备提供技术参数,考察了碳沉积温度为450、500、550、600、650℃时,其对CH4/N2分离用碳分子筛性能的影响。结果表明:吸附容量和平衡分离系数均随着碳沉积温度的增加呈先增加后减小的趋势,沉积温度为550℃时碳分子筛性能最佳,CH4最大吸附容量达1.41 mmol/g,CH4/N2平衡分离系数达4.74。氮气吸附/脱附等温线表明在此条件下制备的碳分子筛样品以微孔为主。

In order to provide technical parameters to prepare the carbon molecular sieve applied to CH4/N2 separation, the paper investigated carbon temperatures of 450, 500, 550, 600 and 650 ~C affected to the performance of the carbon molecular sieve applied to the CH4/N2 separation. The results showed that the adsorption volume and the balanced separation coefficient both would be increased with the carbon deposition temperature increased and then would be decreased in tendency. When the deposition temperature was at 550 ~C, the performance of the carbon molecular sieve would be optimum, the max adsorption volume of CH4 was 1.41 mmol/g and the balanced separation coefficient of CH4/N2 was 4.74. The adsorption/desorption isotherm of nitrogen showed that the carbon molecular sieve sample prepared under the such conditions was micropore mainly.