Highly CO2 Selective Metal–Organic Framework Membranes with Favorable Coulombic Effect
Journal
Advanced Functional Materials
Journal Volume
31
Journal Issue
4
Date Issued
2021
Author(s)
Abstract
The topology and chemical functionality of metal–organic frameworks (MOFs) make them promising candidates for membrane gas separation; however, few meet the criteria for industrial applications, that is, selectivity of >30?for CO2/CH4 and CO2/N2. This paper reports on a dense CAU-10-H MOF membrane that is exceptionally CO2-selective (ideal selectivity of 42 for CO2/N2 and 95 for CO2/CH4). The proposed membrane also achieves the highest CO2 permeability (approximately 500 Barrer) among existing pure MOF membranes with CO2/CH4 selectivity exceeding 30. State-of-the-art atomistic simulations provide valuable insights into the outstanding separation performance of CAU-10-H at the molecular level. Adsorbent–adsorbate Coulombic interactions are identified as a crucial factor in the design of CO2-selective MOF membranes. ? 2020 Wiley-VCH GmbH
Subjects
Carbon dioxide
Atomistic simulations
Chemical functionality
Coulombic effects
Coulombic interactions
Ideal selectivities
Molecular levels
Separation performance
State of the art
Gas permeable membranes
SDGs
Type
journal article