Carbon-supported ionic liquids as innovative adsorbents for CO2 separation from synthetic flue-gas

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Title: Carbon-supported ionic liquids as innovative adsorbents for CO2 separation from synthetic flue-gas
Authors: Erto, Alessandro | Silvestre Albero, Ana | Silvestre-Albero, Joaquín | Rodríguez Reinoso, Francisco | Balsamo, Marco | Lancia, Amedeo | Montagnaro, Fabio
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: CO2 adsorption | Ionic liquid | Carbon dioxide | Activated carbon | Post-combustion | Sorbent pore clogging
Knowledge Area: Química Inorgánica
Issue Date: 15-Jun-2015
Publisher: Elsevier
Citation: Journal of Colloid and Interface Science. 2015, 448: 41-50. doi:10.1016/j.jcis.2015.01.089
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.
ISSN: 0021-9797 (Print) | 1095-7103 (Online)
DOI: 10.1016/j.jcis.2015.01.089
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 Elsevier Inc.
Peer Review: si
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