title: Encapsulated Ionic Liquids for CO2Capture: Using 1-Butyl-methylimidazolium Acetate for Quick and Reversible CO2Chemical Absorption.
abstract: The potential advantages of applying encapsulated ionic liquid (ENIL) to CO2capture 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 CO2sorbent was evaluated by gravimetric and fixed-bed sorption experiments at different temperatures and CO2partial pressures. ENIL maintains the favourable thermodynamic properties of the neat IL regarding CO2absorption. Remarkably, a drastic increase of CO2sorption 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 CO2chemical absorbents (low absorption rate and difficulties in solvent regeneration) are overcome by using ENIL systems.
authors.affiliation: Sección de Ingeniería Química (Dep. de Química Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.
authors.forename: Cristian
authors.initials: C
authors.lastname: Moya
authors.affiliation: Sección de Ingeniería Química (Dep. de Química Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.
authors.forename: Noelia
authors.initials: N
authors.lastname: Alonso-Morales
authors.affiliation: Sección de Ingeniería Química (Dep. de Química Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Gilarranz
authors.affiliation: Sección de Ingeniería Química (Dep. de Química Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Rodriguez
authors.affiliation: Sección de Ingeniería Química (Dep. de Química Física Aplicada), Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.
authors.forename: Jose
authors.initials: J
authors.lastname: Palomar
keywords: CO2 capture; chemical adsorption; encapsulated ionic liquids; mass transfer limit; thermodynamic properties