基于三蝶烯结构聚酰亚胺膜的制备及其H_(2)/轻烃分离性能  

PREPARATION OF POLYAMIDE MEMBRANE BASED ON TRIPHENE STRUCTURE AND ITS HYDROGEN LIGHT HYDROCARBON SEPARATION PERFORMANCE

作　　者：袁清 李庚鸿 李苏爽 高雪 周浩力 Yuan Qing;Li Genghong;Li Sushuang;Gao Xue;Zhou Haoli(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083;College of Chemical Engineering,University of Nanjing Technology)

机构地区：[1]中石化石油化工科学研究院有限公司,北京100083 [2]南京工业大学化工学院

出　　处：《石油炼制与化工》2023年第3期101-106,共6页Petroleum Processing and Petrochemicals

基　　金：炼油工艺与催化剂国家工程研究中心(中石化石油化工科学研究院有限公司)开放基金课题(33600000-20-ZC0607-0007)。

摘　　要：针对微孔聚合物膜较低的通量和较差的溶解性,通过2,3,6,7-四甲酸三蝶烯二酐单体与2,2-双三氟甲基联苯胺的缩聚反应,制备了一种具有自具微孔的三蝶烯聚酰亚胺(T-PI)化合物。三蝶烯基团的引入使得T-PI易溶于多种常用的有机溶剂,且热稳定性良好。将T-PI制备成气体分离膜,T-PI膜对H_(2)和CO_(2)的渗透系数分别达到了518 barrer和810 barrer,对CO_(2)/CH_(4)的理想选择性达到了21.9,接近Robeson气体分离上限(2008年)。将T-PI膜用于H_(2)和5种轻烃混合气的分离,在0.4 MPa的跨膜压差下,T-PI膜可将H_(2)体积分数从32.9%提高到73.7%,表明T-PI膜在低压差下实现H_(2)/轻烃分离的潜力。Polymers of intrinsic microporosity(PIMs)have excellent gas separation performance,but their low flux and poor solubility limit their application in industry.A kind of triptycene polyamide(T-PI)with intrinsic microporosity was prepared by polycondensation of triptycene-2,3,6,7-tetracarboxylic tridietene dianhydride monomer with 2,2-bis(trifluoromethyl)benzidine.The introduction of triphene group makes T-PI soluble in many common organic reagents and has good thermal stability.The permeability for H_(2) and CO_(2) was 518 and 810 barrer,respectively,and the ideal selectivity of CO_(2) CH_(4) reached 21.9,which was close to Robeson’s upper limit of gas separation(2008).The T-PI membrane was used for the separation of H_(2) and five light hydrocarbon mixtures.The volume fraction of H_(2) was increased from 32.9%to 73.7%by T-PI membrane at 0.4 MPa pressure difference,it showed that the T-PI membrane had a potential to realize separation of H_(2) and light hydrocarbon at a low pressure difference.

关 键 词：三蝶烯 聚酰亚胺 H_(2)/轻烃分离 气体分离 

分 类 号：TQ051.893[化学工程]