title: Carbon-supported ionic liquids as innovative adsorbents for CO₂ separation from synthetic flue-gas.
abstract: Fixed-bed thermodynamic CO2 adsorption tests were performed in model flue-gas onto Filtrasorb 400 and Nuchar RGC30 activated carbons (AC) functionalized with [Hmim][BF4] and [Emim][Gly] ionic liquids (IL). A comparative analysis of the CO2 capture results and N2 porosity characterization data evidenced that the use of [Hmim][BF4], a physical solvent for carbon dioxide, ended up into a worsening of the parent AC capture performance, due to a dominating pore blocking effect at all the operating temperatures. Conversely, the less sterically-hindered and amino acid-based [Emim][Gly] IL was effective in increasing the AC capture capacity at 353 K under milder impregnation conditions, the beneficial effect being attributed to both its chemical affinity towards CO2 and low pore volume reduction. The findings derived in this work outline interesting perspectives for the application of amino acid-based IL supported onto activated carbons for CO2 separation under post-combustion conditions, and future research efforts should be focused on the search for AC characterized by optimal pore size distribution and surface properties for IL functionalization.
authors.affiliation: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Erto
authors.affiliation: Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Ap. 99, E-03080 Alicante, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Silvestre-Albero
authors.affiliation: Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Ap. 99, E-03080 Alicante, Spain.
authors.forename: Joaquín
authors.initials: J
authors.lastname: Silvestre-Albero
authors.affiliation: Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Ap. 99, E-03080 Alicante, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Rodríguez-Reinoso
authors.affiliation: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy. Electronic address: marco.balsamo@unina.it.
authors.forename: Marco
authors.initials: M
authors.lastname: Balsamo
authors.affiliation: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy.
authors.forename: Amedeo
authors.initials: A
authors.lastname: Lancia
authors.affiliation: Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant'Angelo, 80126 Napoli, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Montagnaro
keywords: Activated carbon; CO(2) adsorption; Carbon dioxide; Ionic liquid; Post-combustion; Sorbent pore clogging