Encapsulated Ionic Liquids to Enable the Practical Application of Amino Acid-Based Ionic Liquids in CO2 Capture

Santiago, Rubén, Lemus, Jesús, Moya, Cristian, Moreno, Daniel, Alonso-Morales, Noelia y Palomar, José . (2018) Encapsulated Ionic Liquids to Enable the Practical Application of Amino Acid-Based Ionic Liquids in CO2 Capture. ACS Sustainable Chemistry & Engineering 2018 6 (11)


Título Encapsulated Ionic Liquids to Enable the Practical Application of Amino Acid-Based Ionic Liquids in CO2 Capture
Autor(es) Santiago, Rubén
Lemus, Jesús
Moya, Cristian
Moreno, Daniel
Alonso-Morales, Noelia
Palomar, José
Materia(s) Ingeniería Industrial
Abstract The performance of three amino-acid-based ionic liquids (aa-ILs) has been evaluated in CO2 capture by means of gravimetric measurements. The tested aa-ILs were 1-butyl-3- methylimidazolium prolinate, [Bmim][PRO]; 1-butyl-3-methylimidazolium methioninate, [Bmim][MET]; and 1-butyl-3-methylimidazolium glycinate, [Bmim][GLY]. First, the CO2 chemical absorption process was analyzed by in situ Fourier transform infrared spectroscopy−attenuated total reflection (FTIR-ATR), following the characteristic vibrational signals of the reactants and products, and comparing them with theoretical measurements obtained by quantum chemical calculations. This study let us confirm a mechanism of CO2 chemical absorption on amino-acid-based ILs. Then, gravimetric experiments were carried out to characterize the CO2 capture by aa-ILs. It was found that CO2 absorption quantification of these ILs was rather slow, because of their high viscosities, so alternative methodologies had to be employed to use them as absorbents in CO2 capture. In this sense, aa-ILs were encapsulated in porous carbon capsules (aa-ENIL), since it has been previously reported as material that defeats the kinetic limitations and preserves the favorable CO2 capture capacity of the neat ILs, promoting efficient chemical absorption. These aa-ENIL materials permit evaluation of CO2 capture at equilibrium and experimentally characterize the thermodynamics absorption phenomena, in terms of reaction enthalpy and the contribution of physical (H) and chemical (Keq) CO2 absorption for each IL. ENIL materials allow a fast CO2 capture with high sorption capacity and easy regeneration due to the favorable thermodynamics and kinetics of the process.
Palabras clave Chemical CO2 capture
Amino-acid-based
Ionic liquids
aa-ENIL
Editor(es) Academic Publishing International Limited
Fecha 2018-09-21
Formato application/pdf
Identificador bibliuned:DptoIEEC-ETSI-Articulos-Rsantiago-0003
http://e-spacio.uned.es/fez/view/bibliuned:DptoIEEC-ETSI-Articulos-Rsantiago-0003
DOI - identifier 10.1021/acssuschemeng.8b02797
Número de Volumen 2018 6
Número de Issue 11
Página inicial 14178
Página final 14187
Publicado en la Revista ACS Sustainable Chemistry & Engineering 2018 6 (11)
Versión de la publicación acceptedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in ACS Sustainable Chemistry & Engineering, is available online at the publisher's website: ACS Publications, https://doi.org/10.1021/acssuschemeng.8b02797
Notas adicionales La versión registrada de este artículo, publicado por primera vez en ACS Sustainable Chemistry & Engineering, está disponible en línea en el sitio web del editor: ACS Publications, https://doi.org/10.1021/acssuschemeng.8b02797

 
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Creado: Mon, 15 Jan 2024, 23:17:42 CET