摘要
面对温室效应、气候变化的严重形势,膜技术用于CO_(2)分离捕集、减少CO_(2)排放具有重要意义.为打破纯聚合物膜渗透性和选择性之间“Trade-off”的限制,以聚醚-酯EM400为基质,多孔金属有机框架MIL-101(Cr)为填料,制备EM400/MIL-101(Cr)混合基质膜,并对MIL-101(Cr)进行氨基化、硝基化、羟基化改性,研究其CO_(2)分离性能.结果表明,MIL-101(Cr)的加入提高了EM400/MIL-101(Cr)混合基质膜的扩散系数和溶解系数,使得CO_(2)渗透系数增大并保持气体选择性不变.改性后的混合基质膜以羟基化改性的EM400/MIL-101(Cr)-OH混合基质膜的CO_(2)渗透性最高,以氨基化改性的EM400/MIL-101(Cr)-NH_(2)混合基质膜的气体分离选择性最好.
Facing the situation of the greenhouse effect and climate change, membrane technology is of great significance for CO_(2)separation and capture to reduce CO_(2)emissions. To break the “Trade-off” between permeability and selectivity of polymers, the EM400/MIL-101(Cr) mixed matrix membranes(MMMs) were prepared by using EM400(polyether-ester) as matrix and porous metal-organic framework(MOF), MIL-101(Cr), as filler. And then, the MIL-101(Cr) was modified by-NH_(2),-NO_(2) and-OH to study their CO_(2)separation performance. The results showed that the addition of MIL-101(Cr) can effectively improve the diffusion coefficient and dissolution coefficient of EM400/MIL-101(Cr) MMMs, resulting in an enhanced CO_(2)permeability with little change of selectivity. Among these EM400/modified MIL-101(Cr) MMMs, the EM400/MIL-101(Cr)-OH MMMs had the highest CO_(2)permeability, and the EM400/MIL-101-NH_(2) MMMs showed better gases selectivity.
作者
陈淑慧
赵丹
高继发
任吉中
CHEN Shuhui;ZHAO Dan;GAO Jifa;REN Jizhong(National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China;Dalian Jiaotong University,Dalian 116028,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2023年第1期65-73,共9页
Membrane Science and Technology
基金
国家自然科学基金项目(21908215)
大连市支持高层次人才创新创业项目(2019RQ062)
中国科学院战略性先导技专项子课题(XDA21070606)。
