Porous ionic liquids are non volatile, versatile materials that associate porosity and fluidity. New porous ionic liquids, based on the ZIF-8 metal-organic framework and on phosphonium acetate or levulinate salts, were prepared and show an increased capacity to absorb carbon dioxide at low pressures. Porous suspensions based on phosphonium levulinate ionic liquid absorb reversibly 103% more carbon dioxide per mass than pure ZIF-8 per mass at 1 bar and 303 K. We show how the rational combination of MOFs with ionic liquids can greatly enhance low pressure CO2 absorption, paving the way to ward a new generation of high-performance, readily available liquid materials for effective low pressure carbon capture.
« New high‐performance porous ionic liquids for low pressure CO2 capture » M. Costa Gomes, J. Avila, L.F. Lepre, C. Santini, M. Tiano, S. Denis-Quanquin, K. Chung Szeto and A. Padua Angew. Chem. Int. Ed. 2021, 60 (23), 12876-12882 DOI:10.1002/anie.202100090
Also available on ChemRxiv https://doi.org/10.26434/chemrxiv.13382741.v1