Abstract:

Fe/C hybrid carbon membranes were designed and prepared by incorporating ferrocene into the precursor of carbon membrane and then by carbonization under high temperature.Effects of ferrocene quantities added on the gas permeability of the hybrid carbon membrane were investigated.The prepared hybrid carbon membrane was characterized by TG, ATR-FTIR, XRD and TEM.The ferrocene quantities added have a remarkable effect on the gas permeability of carbon membrane.The gas permeability of the membrane increases, while the selectivity decreases, with the increase of the ferrocene quantities added. The hybrid carbon membrane shows an excellent gas separation performance when the addition of ferrocene is 15% where the gas permeabilities of pure gases such as H₂, CO₂, O₂, N₂ and CH₄ are 2806,1039, 266, 31 and 8 barrer, and the selectivity of O₂/N₂, CO₂/N₂ and CO₂/CH₄ are 8.6, 33.5 and 129.5,respectively.

Key words: Fe/C杂化炭膜, 二茂铁, 渗透通量, 气体分离

摘要：

将二茂铁作为有机添加剂引入炭膜前驱体聚酰亚胺，经高温热解制备了Fe/C杂化炭膜。考察了二茂铁的添加量对杂化炭膜气体渗透性能的影响。采用热重、红外、X射线衍射和透射电镜等分析方法对所制备的杂化炭膜进行了表征。结果表明，在前驱体中添加二茂铁能显著提高炭膜的气体渗透性能，随着添加量的增加，膜的气体渗透系数明显增加而分离系数则减小，当二茂铁添加量为15%时，对H₂、O₂、N₂、CO₂、CH₄等纯气体的渗透系数分别为2806、1039、266、31、8 barrer，对O₂/N₂、CO₂/N₂、CO₂/CH₄的分离系数分别为8.6、33.5、129.5。Fe/C杂化炭膜是基于“分子筛分”机理分离气体分子。

关键词: Fe/C杂化炭膜, 二茂铁, 渗透通量, 气体分离