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以煤沥青基炭分离膜为支撑体 ,采用聚合物溶液涂层或浸渍制备出了炭 -炭复合分离膜。测试了高纯H2 、CO2 、N2 和 O2 单组分在炭 -炭复合分离膜上的渗透速率 ,计算了各气体组分的理想分离系数。结果显示以聚乙二醇水溶液进行表面涂层制备的炭 -炭复合膜 ,其气体分离性能与炭分离膜相比稍有提高。以酚醛树脂 N、N-二甲基乙酰胺溶液和加有分散剂的酚醛树脂乙醇溶液涂层制备的炭 -炭复合膜在分离性能上都有较大提高 ,尤其加有分散剂的酚醛树脂乙醇溶液涂层后可使 H2 /CO2 的分离系数达 1 6.0左右。而采用酚醛树脂乙醇溶液涂层和浸渍得到的炭 -炭复合膜的气体渗透速率和分离系数均下降。
The carbon-carbon composite separation membrane was prepared by coating or dipping polymer solution on the basis of coal tar pitch-based carbon separation membrane. The permeation rates of high purity H2, CO2, N2 and O2 single component on the carbon-carbon composite separation membrane were tested, and the ideal separation coefficient of each gas component was calculated. The results show that the carbon-carbon composite membrane prepared by the surface coating with polyethylene glycol aqueous solution has slightly improved gas separation performance compared with the carbon separation membrane. The carbon-carbon composite films prepared by coating the phenolic resin N, N-dimethylacetamide solution and the phenolic resin with dispersant added greatly improve the separation performance, especially the dispersant-added phenolic resin After the ethanol solution is coated, the separation factor of H2 / CO2 can reach about 1.06. However, the gas permeation rate and the separation coefficient of the carbon-carbon composite membrane obtained by the coating and impregnation of the phenolic resin ethanol solution all decreased.