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High‐Performance Porous Ionic Liquids for Low‐Pressure CO 2 Capture **
Author(s) -
Avila Jocasta,
Lepre L. Fernando,
Santini Catherine C.,
Tiano Martin,
DenisQuanquin Sandrine,
Chung Szeto Kai,
Padua Agilio A. H.,
Costa Gomes Margarida
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202100090
Subject(s) - ionic liquid , phosphonium , porosity , carbon dioxide , chemical engineering , ionic bonding , absorption (acoustics) , chemistry , inorganic chemistry , ambient pressure , bar (unit) , carbon fibers , porous medium , materials science , organic chemistry , ion , catalysis , composite material , thermodynamics , composite number , physics , meteorology , engineering
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 at 1 bar and 303 K. We show how the rational combination of MOFs with ionic liquids can greatly enhance low pressure CO 2 absorption, paving the way towards a new generation of high‐performance, readily available liquid materials for effective low pressure carbon capture.