Fe/C杂化炭膜的制备及其气体分离性能  

Fabrication of Fe/C hybrid carbon membranes for gas separation

作　　者：赵选英[1] 王同华[1] 李琳[1] 刘颖[1] 曹义鸣[2] 

机构地区：[1]大连理工大学化工学院精细化工国家重点实验室,炭素材料实验室,辽宁大连116012 [2]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《化工学报》2009年第9期2232-2236,共5页CIESC Journal

基　　金：国家自然科学基金重点项目(20776024,20836006)~~

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、8barrer,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。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.

关 键 词：Fe/C杂化炭膜 二茂铁 渗透通量 气体分离 

分 类 号：TQ028.8[化学工程]