Materials Today

Materials Today

Volume 60, November 2022, Pages 9-16
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RESEARCH: Short Communication
Porous liquids as solvents for the economical separation of carbon dioxide from methane

https://doi.org/10.1016/j.mattod.2022.09.004Get rights and content
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Abstract

Current CO2 separation technologies by liquid solvents suffer from either high regeneration costs or low selectivity/capacity of the solvent. Dispersing ca. 12.5 wt% CO2-selective zeolite rho solid into the commercial CO2 capture solvent Genosorb® converts it into a porous liquid with at least 2.5 times greater CO2 capacity and CO2/CH4 selectivity compared to Genosorb® itself. This is predicted to result in more economical separation processes, particularly for biogas upgrading.

Graphical abstract

Porous liquid zeo-PLs, a novel class of solvent, provide a more efficient CO2 separation from CH4 and a more economical alternative over the current Genosorb solvent dissolution technology.

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Keywords

Porous liquids
Zeolites
Genosorb
Carbon capture
Biogas upgrading

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© 2022 The Authors. Published by Elsevier Ltd.