热缩聚煤沥青压型制备分子筛炭膜 (IV)活化法在炭膜制备上的应用

MANUFACTURING CARBON MOLECULAR SIEVE MEMBRANE FROM HEAT-TREATMENT COAL PITCH BY PRESSING(IV) ──APPLYING ACTIVATION IN PREPARING CARBON MEMBRANE

在破沉积法和表面涂层法制备分子筛炭膜的基础上，在氧化气氛下对所制得的分子筛炭膜进行适当活化，可以大大提高分子筛炭膜对H_2／CO_2的分离性能．实验结果表明，在750℃通入CO_2／N_2的混合气（体积比为1：4），对前述两种方法制得的分子筛炭膜活化30min，H_2／CO_2的分离系数由活化前的11．5上升到27．8，H_2的渗透速率略有提高，CO_2稍有下降．与其它几种膜材料H_2／CO_2的分离性能相比，活化制得分子筛炭膜有很大的优越性．

Carbon membrane prepared by carbon deposition and surface coating was activated undersuitable condition to improve its gas separaration ability. Results show that when carbon membrane wasactivated by CO2/N2 mistore under 750℃ for 30 mins, its H2/CO2 separation factor was enhancedfrom 11. 5 to 27. 8. Gas permeablity and selectivity of membrane are superior to data in reference.