热缩聚煤沥青压型制备分子筛炭膜（Ⅱ）──液相碳沉积法制备分子筛炭膜

MANUFACTURING CARBON MOLECULAR SIEVE MEMBRANE FROM HFAT-TREATMENT COAL BASED PITCH BY PRESSING(Ⅱ)──PREPARATION CARBON MOLECULAR SIEVE MEMBRANE BY LIQUID PHASE CARBON DEPOSITION METHOD

以一定浓度的酚醛树脂溶液对炭膜基板进行碳沉积处理，考察碳沉积条件对所制备的分子筛炭膜气体分离性能的影响。实验结果表明，较好的碳沉积条件为：碳沉积液浓度为６０％，浸渍时间为１２０ｍｉｎ，碳沉积次数为三次，热处理温度为７００℃。此膜对ＣＯ_２和Ｈ_２有很好的分离作用，两者的透过速率分别为１０^（－６）和１０^（－５）ｃｍ~３（ＳＴＰ）／ｃｍ~２·ｓ·ｃｍＨｇ数量级，分离系数可达１７．８。初步研究结果表明，此膜对ＣＯ_２／Ｏ２、ＣＯ_２／Ｎ_２和ＣＯ_２／ＣＨ_４也有一定的分离能力，分离系数在６．０左右。

A certain concentration of PF solution served as carbon material was used to manufacture carbon molecular sieve membrane.The effect of carbon deposition condition on gas permeability and selectivity through the membrane was investigated.The results show that the optimum carbon deposition conditions are as follow:the concentration of the solution, 60%(Vol); soaking time,120min, treatment number,3;heat-treatment temperature 700℃. The permeation rate of CO_2 and H_2 through the membrane is in 10￣(-6) and 10￣(-5) cm￣3 (STP)/cm￣2·s·cmHg order of magnitude respectively,the separation factor of H_2 to CO_2 is about 17.8.The preliminary results show that the membrane is effective for separating CO_2/O_2, CO_2/N_2 and CO_2/CH_4, the separation factor are about 6.0.