With the continued rise in atmospheric CO2 levels and the potential impact on climate, carbon dioxide separation and capture has gained prominence as a potential technological solution to reduce CO2 emissions, resulting in increased interest in advanced materials to facilitate the removal of CO2 from energy-related emissions. A number of approaches such as liquid absorbents, solid adsorbents and membranes have been explored to separate CO2 from mixed gas streams. We will explore the interactions that affect the transport, sorption and separation of CO2 in a variety of new materials including ionic liquids, membranes and porous liquids. Ionic liquids are promising materials for liquid-based absorption and as membranes to separate CO2 because they provide a unique framework to tailor the solubility and diffusion of gas molecules to improve gas interaction and transport. Hybrid membranes combine the advantages of a porous material with the stability and reliability of a dense matrix while ultra-thin membranes enable fast transport and controlled selectivity. Porous ionic liquids are an emerging class of materials that combine the attributes of porous materials within a nonvolatile liquid matrix leading to the presence of permanent porosity within the liquid. Understanding the atomic level interactions that impact the gas separations properties of these materials is crucial as we move forward.

Understanding interactions in new carbon capture materials

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ACS Spring 2023

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