Microporous Crystalline Molecular Sieve Membranes for Molecular Gas Separations: What Is Next?

Different microporous crystalline molecular sieve compositions including zeolites (pure inorganic framework), metal organicframeworks (hybrid framework), and porous organic cages (pure organicframework) among others have been demonstrated to be very effectivein separating industrially relevant challenging gas mixtures. Theseparation mechanisms of different gases over these membranes havebeen discussed previously. These mechanisms mainly include twocontributions: thermodynamic and kinetic. Depending on the type offramework and gas, each contribution can be dominant. The question iswhich are the pressing issues that the scientific community needs tofocus on to take these membranes to the next step. Herein, I discusssome important aspects that require attention to these membranes for their potential deployment. These aspects includemainly membrane reproducibility, scalability, performance under realistic conditions, and overall techno-economic analysis

Automated summary

This article discusses the effectiveness of different types of microporous crystalline molecular sieves in separating gas mixtures, analyzing the thermodynamic and kinetic contributions in the separation mechanisms, and highlighting important issues such as membrane reproducibility, scalability, performance under realistic conditions, and techno-economic analysis that require attention.