Enhanced separation performance of ZIF-8 membrane through gas-assisted surface ligand exchange modification

被引：0

作者：

Ibrahim, Amr F. M. ^{[1
,2
]}

Banihashemi, Fateme ^{[1
]}

Lin, Jerry Y. S. ^{[1
]}

机构：

[1] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA

[2] Suez Univ, Fac Petr & Min Engn, Suez 43512, Egypt

来源：

MATERIALS LETTERS | 2024年 / 377卷

基金：

美国国家科学基金会;

关键词：

ZIF-8; membranes; Propylene/propane separation; Gas-assisted membrane surface ligand; exchange; 6-Dimethylbenzimidazole;

D O I：

10.1016/j.matlet.2024.137469

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new approach for ZIF-8 membrane modification by surface ligand exchange using 5,6-dimethylbenzimidazole is presented to clarify the exchange mechanism. One hour of ZIF-8 membrane modification enhances both propylene permeance and (propylene/propane) separation factor by about 11 % and 39-72 %, respectively, depending on the membrane's initial quality. The best modified ZIF-8 membrane shows propylene permeance of 6.34 x 10-9 mol/(m2s.Pa) and selectivity of 188.6. This improvement contrasts with previous studies that reported a decrease in permeance for modified membranes, thereby supporting the advancement of ZIF-8 membranes toward commercialization.

引用

页数：4

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