Etched ZIF‐8 as a Filler in Mixed‐Matrix Membranes for Enhanced CO<sub>2</sub>/N<sub>2</sub> Separation
Yichen Zhou, Mingmin Jia, Xiong‐Fei Zhang, Jianfeng Yao
Abstract
Abstract Zeolite ZIF‐8 has been etched with acid to form microporous ZIF‐8‐E crystals. These were then introduced into a polyethersulfone (PES) membrane matrix to enhance its CO 2 /N 2 separation performance. Open through pores of size about 100 nm formed in the ZIF‐8 crystals allow the ingrowth of polyethersulfone chains, ensuring a reduction in the number of nonselective voids, thereby achieving better interaction between ZIF‐8‐E and PES. As a result, the CO 2 /N 2 separation performance of the ZIF‐8‐E/PES membrane increased significantly, showing a CO 2 permeability of 15.7 Barrer and a CO 2 /N 2 ideal selectivity of 6.5.
Topics & Concepts
BarrerMembraneMicroporous materialSelectivityMaterials scienceZeoliteChemical engineeringGas separationMatrix (chemical analysis)Composite materialChemistryOrganic chemistryCatalysisEngineeringBiochemistryMembrane Separation and Gas TransportMetal-Organic Frameworks: Synthesis and ApplicationsAmmonia Synthesis and Nitrogen Reduction