Role of Facilitated Transport Membranes and Composite Membranes for Efficient CO₂ Capture – A Review

Abstract

CO 2 emission from anthropogenic sources has raised global environmental concerns, and efficient reduction of these greenhouse gas emissions by capturing CO 2 is recognized world-wide as very important along with the implementation of new green energy technology. Membrane technology is considered to be one of the efficient techniques to be used for CO 2 capture. Among different types of membranes, mixed matrix membranes and facilitated transport membranes have gained much interest in recent years due to documented high CO 2 permeance through these membranes, especially when the gas is humid as is the case for flue gas from combustion. In the current review, a comprehensive discussion is focused on the development of hybrid membranes involving the selection of the fixed site carrier (FSC) membranes and the interaction of nanosilica-particles in a polymer membrane for efficient CO 2 capture. Other facilitated transport membranes and mixed matrix membranes are also briefly discussed.

Facile CO2 Separation in Composite Membranes

“…Different strategies were created for the fabrication of polymeric membranes in order to improve the mechanical strength, to minimize membrane compactness at high pressure, and to improve CO 2 permeability . The polymer used for the membrane synthesis for gas separation should be highly sorbed, so it may resist plasticization at higher pressure.…”

Molecular Insights into Benzimidazole‐Linked Polymer Interactions with Carbon Dioxide and Nitrogen

“…Which means that sorption and separation process should be based on strong either physisorption with pressure swing regeneration or chemisorption with thermal regeneration. Hence, there have been many different alternative materials have been studied such as ionic liquids, deep eutectic solvents, membranes, metal organic frameworks, covalent organic frameworks, porous polymers or other porous materials . Among those, covalent porous adsorbents have received remarkable attention both from industry and academia over the past couple of decades since they can be custom designed and engineered to have high CO 2 sorption performance and gas separation selectivity with regeneration properties that can be achieved with low energy input in comparison to corrosive and toxic amine solutions, Covalent porous organic polymers have structures that include attractive interaction sites that has high affinity for CO 2 with low‐to‐moderate binding energies that allows modest regeneration energy costs.…”

Structural Elucidation of Covalent Organic Polymers (COP) and Their Linker Effect on Gas Adsorption Performance via Density Functional Theory Approach

“…The properties of these materials might meet the qualifications for high‐performance absorbents that can work based on either chemical or physical sorption mechanism depending on the selection of constituents of the solvents. Furthermore, other alternative adsorbents such as membranes, metal organic frameworks, covalent organic frameworks, porous polymers or other porous materials have been considered for the same intended purpose. For either absorbents and adsorbents, the most challenging issue in industrial scale for a sorbent that can be considered as an alternative in a fossil‐fueled power plant (or other chemical industry that has high CO 2 emissions) is the low CO 2 partial pressures that requires high efficiency capture performance for less sorption energy penalty .…”