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Encapsulated Ionic Liquids for CO 2 Capture: Using 1‐Butyl‐methylimidazolium Acetate for Quick and Reversible CO 2 Chemical Absorption.
Author(s) -
Moya Cristian,
AlonsoMorales Noelia,
Gilarranz Miguel A.,
Rodriguez Juan J.,
Palomar Jose
Publication year - 2016
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201600977
Subject(s) - ionic liquid , sorption , gravimetric analysis , sorbent , absorption (acoustics) , butyl acetate , chemistry , chemical engineering , solvent , inorganic chemistry , materials science , organic chemistry , adsorption , catalysis , engineering , composite material
The potential advantages of applying encapsulated ionic liquid (ENIL) to CO 2 capture by chemical absorption with 1‐butyl‐3‐methylimidazolium acetate [bmim][acetate] are evaluated. The [bmim][acetate]‐ENIL is a particle material with solid appearance and 70 % w/w in ionic liquid (IL). The performance of this material as CO 2 sorbent was evaluated by gravimetric and fixed‐bed sorption experiments at different temperatures and CO 2 partial pressures. ENIL maintains the favourable thermodynamic properties of the neat IL regarding CO 2 absorption. Remarkably, a drastic increase of CO 2 sorption rates was achieved using ENIL, related to much higher contact area after discretization. In addition, experiments demonstrate reversibility of the chemical reaction and the efficient ENIL regeneration, mainly hindered by the unfavourable transport properties. The common drawback of ILs as CO 2 chemical absorbents (low absorption rate and difficulties in solvent regeneration) are overcome by using ENIL systems.