Zeolites and metal–organic frameworks for gas separation: the possibility of translating adsorbents into membranes

Abstract

We highlighted the similarities/differences between zeolites and MOFs in adsorption and membrane separation and discussed the feasibility of adsorbent-to-membrane separation.

Highly Permeable and Well-Oriented SAPO-34 Membranes for CO2 Removal

“…Despite many efforts to improve the synthesis of zeolite membranes, their large-scale applications are still not well developed due to their relatively low permeability, poor reproducibility, and high costs. Especially compared to that of polymeric membranes, the permeability of zeolite membranes is not competitive . In fact, since highly selective membranes exhibit low permeance and vice versa, the trade-off between permeance and selectivity of zeolite membranes is one of the main concerns in their commercialization .…”

“…Especially compared to that of polymeric membranes, the permeability of zeolite membranes is not competitive . In fact, since highly selective membranes exhibit low permeance and vice versa, the trade-off between permeance and selectivity of zeolite membranes is one of the main concerns in their commercialization . Various methods have been proposed by researchers to increase the permeance of zeolite membranes without compromising their selectivity including self-supporting membranes, reducing the thickness of the zeolite layer, using nanosized seeds, and hierarchical zeolite crystals .…”

The role of terminal coordinated amides in a series of Ca-tatb frameworks: pore size regulation and fluorescence sensing tunability

“…In the past two decades, there have been significant advancements in the field of metal organic frameworks (MOFs) due to their abundant structural features and various promising applications. [1][2][3][4][5] As a unique characteristic, the pore structures of MOFs could be tailored based on their designable characteristics. The tunability of the pore environment and size is of great importance to MOF materials and can provide specific active sites for catalysis, alter pore size distributions for adsorption and separation, monitor channel dimensionalities for energy applications, and so forth.…”

Empowering the Water Oxidation Activity of the Bimetallic Metal–Organic Framework by Annexing Gold Nanoparticles over the Catalytic Surface

“…Metal–organic frameworks (MOFs) are one type of crystalline materials that are obtained when a metal or a group of metals called a cluster is coordinated with organic linkers. Sometimes, these MOFs are also coined as porous coordination polymers, where they have special properties like large surface area, high porosity, and structure. − Because of their unique properties, they are employed in numerous applications like gas separation, , gas storage, , sensing, , catalysis, , and drug administration. , Moreover, the MOF is used in various fields showing excellent performance in electrochemical applications such as energy conversion, , energy storage, , and electrocatalysis. , However, there are still many MOF-based materials that do not perform well as electrocatalysts because of their poor conductivity and chemical stability in alkaline and acidic electrolytes. − Many research communities are trying to develop new catalysts to achieve an excellent electrocatalytic performance. − In this way, a more active metal site in the porous catalysts at the interface between the electrode and electrolyte has a critical function in facilitating molecular adsorption, subsequent reactions, and desorption, leading to a high electrocatalytic performance (Scheme ).…”

“…Sometimes, these MOFs are also coined as porous coordination polymers, where they have special properties like large surface area, high porosity, and structure. 14−17 Because of their unique properties, they are employed in numerous applications like gas separation, 18,19 gas storage, 20,21 sensing, 22,23 catalysis, 24,25 and drug administration. 26,27 Moreover, the MOF is used in various fields showing excellent performance in electrochemical applications such as energy conversion, 28,29 energy storage, 30,31 and electrocatalysis.…”