Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids

The performance of encapsulated ionic liquid (ENIL) sorbents has been experimentally evaluated in CO2/CH4 separation by means of gravimetric and fixed-bed measurements. Six ionic liquids (ILs) with CO2 chemical absorption ([Emim][Acetate], [Bmim][Acetate], [P66614][CNPyr], [Bmim][GLY], [Bmim][MET],...

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Authors: Lemus Torres, Jesús, Paramio, C., Hospital Benito, D., Moya, C., Santiago Lorenzo, Rubén, Palomar Herrero, José Francisco
Format: article
Publication Date:2022
Country:España
Institution:Universidad Autónoma de Madrid
Repository:Biblos-e Archivo. Repositorio Institucional de la UAM
Language:English
OAI Identifier:oai:repositorio.uam.es:10486/705985
Online Access:http://hdl.handle.net/10486/705985
https://dx.doi.org/10.1021/acssuschemeng.2c02504
Access Level:Open access
Keyword:Carbon capsule
CO /CH separation 2 4
CO capture 2
Encapsulated ionic liquid
Fixed-bed
Química
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spelling Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquidsLemus Torres, JesúsParamio, C.Hospital Benito, D.Moya, C.Santiago Lorenzo, RubénPalomar Herrero, José FranciscoCarbon capsuleCO /CH separation 2 4CO capture 2Encapsulated ionic liquidFixed-bedQuímicaThe performance of encapsulated ionic liquid (ENIL) sorbents has been experimentally evaluated in CO2/CH4 separation by means of gravimetric and fixed-bed measurements. Six ionic liquids (ILs) with CO2 chemical absorption ([Emim][Acetate], [Bmim][Acetate], [P66614][CNPyr], [Bmim][GLY], [Bmim][MET], and [Bmim]- [PRO]) were selected for the selective separation of CO2 from CH4. ENIL materials were prepared by encapsulation of these ILs in synthesized carbon submicrocapsules, achieving a ∼70% in mass of IL. Fixed-bed experiments of CO2 capture were carried out to evaluate the CO2/CH4 separation performance of prepared ENIL materials at different CO2 partial pressures and 303 K. Both thermodynamics and kinetics of CO2 sorption were analyzed. The experimental CO2 and CH4 isotherms in ENIL materials obtained from fixed-bed experiments were successfully compared to those obtained by reliable gravimetric tests and fitted to the Langmuir− Freundlich equilibrium model. In addition, experimental CO2 breakthrough curves were well-described by the linear driving force and Yoon and Nelson kinetic models, providing sorption rate constants. ENIL sorbents show high CO2 uptake capacity, comparable to conventional adsorbents, but with drastically higher selectivity, in concordance with the negligible CH4 solubility in ILs at the used operating conditions, with acetate-based ENIL materials being the best sorbents in thermodynamic terms. The obtained kinetic parameters revealed that the CO2 chemical sorption with ENIL materials overcomes the IL mass transfer limitations. The sorption rates are faster than those obtained with ENIL using IL physical absorbents and seem to be controlled by the reaction kinetics. The [P66614][CNPyrr]-based ENIL is found to be the most promising material, combining favorable kinetic and thermodynamic considerations for future development of CO2/CH4 separation using fixed-bed technologyThe authors are grateful to Ministerio de Ciencia e Innovación of Spain (projects PID2020-118259RB-I00 and PDC2021- 120881-I00) and Comunidad de Madrid (project P2018/ EMT4348) for financial support and Centro de Computación Científica de la Universidad Autónoma de Madrid for computational facilitiesAmerican Chemical SocietyDepartamento de Ingeniería QuímicaFacultad de CienciasUAM. Departamento de Ingeniería Química20222022-10-12research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/705985https://dx.doi.org/10.1021/acssuschemeng.2c02504reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7059852026-06-23T12:46:27Z
dc.title.none.fl_str_mv Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
title Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
spellingShingle Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
Lemus Torres, Jesús
Carbon capsule
CO /CH separation 2 4
CO capture 2
Encapsulated ionic liquid
Fixed-bed
Química
title_short Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
title_full Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
title_fullStr Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
title_full_unstemmed Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
title_sort Selective CO2/CH4 separation by fixed-bed technology using encapsulated ionic liquids
dc.creator.none.fl_str_mv Lemus Torres, Jesús
Paramio, C.
Hospital Benito, D.
Moya, C.
Santiago Lorenzo, Rubén
Palomar Herrero, José Francisco
author Lemus Torres, Jesús
author_facet Lemus Torres, Jesús
Paramio, C.
Hospital Benito, D.
Moya, C.
Santiago Lorenzo, Rubén
Palomar Herrero, José Francisco
author_role author
author2 Paramio, C.
Hospital Benito, D.
Moya, C.
Santiago Lorenzo, Rubén
Palomar Herrero, José Francisco
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Ingeniería Química
Facultad de Ciencias
UAM. Departamento de Ingeniería Química
dc.subject.none.fl_str_mv Carbon capsule
CO /CH separation 2 4
CO capture 2
Encapsulated ionic liquid
Fixed-bed
Química
topic Carbon capsule
CO /CH separation 2 4
CO capture 2
Encapsulated ionic liquid
Fixed-bed
Química
description The performance of encapsulated ionic liquid (ENIL) sorbents has been experimentally evaluated in CO2/CH4 separation by means of gravimetric and fixed-bed measurements. Six ionic liquids (ILs) with CO2 chemical absorption ([Emim][Acetate], [Bmim][Acetate], [P66614][CNPyr], [Bmim][GLY], [Bmim][MET], and [Bmim]- [PRO]) were selected for the selective separation of CO2 from CH4. ENIL materials were prepared by encapsulation of these ILs in synthesized carbon submicrocapsules, achieving a ∼70% in mass of IL. Fixed-bed experiments of CO2 capture were carried out to evaluate the CO2/CH4 separation performance of prepared ENIL materials at different CO2 partial pressures and 303 K. Both thermodynamics and kinetics of CO2 sorption were analyzed. The experimental CO2 and CH4 isotherms in ENIL materials obtained from fixed-bed experiments were successfully compared to those obtained by reliable gravimetric tests and fitted to the Langmuir− Freundlich equilibrium model. In addition, experimental CO2 breakthrough curves were well-described by the linear driving force and Yoon and Nelson kinetic models, providing sorption rate constants. ENIL sorbents show high CO2 uptake capacity, comparable to conventional adsorbents, but with drastically higher selectivity, in concordance with the negligible CH4 solubility in ILs at the used operating conditions, with acetate-based ENIL materials being the best sorbents in thermodynamic terms. The obtained kinetic parameters revealed that the CO2 chemical sorption with ENIL materials overcomes the IL mass transfer limitations. The sorption rates are faster than those obtained with ENIL using IL physical absorbents and seem to be controlled by the reaction kinetics. The [P66614][CNPyrr]-based ENIL is found to be the most promising material, combining favorable kinetic and thermodynamic considerations for future development of CO2/CH4 separation using fixed-bed technology
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-10-12
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/705985
https://dx.doi.org/10.1021/acssuschemeng.2c02504
url http://hdl.handle.net/10486/705985
https://dx.doi.org/10.1021/acssuschemeng.2c02504
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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