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CO2 Capture by Supported Ionic Liquid Phase: Highlighting the Role of the Particle Size

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dc.contributor.authorLemus, Jesús
dc.contributor.authorHospital Benito, Daniel
dc.contributor.authorMoya, Cristian
dc.contributor.authorBedia, Jorge
dc.contributor.authorAlonso Morales, Noelia
dc.contributor.authorRodríguez Jiménez, Juan J.
dc.contributor.authorPalomar Herrero, José Francisco
dc.contributor.authorSantiago Lorenzo, Rubén
dc.date.accessioned2024-05-20T11:40:08Z
dc.date.available2024-05-20T11:40:08Z
dc.date.issued2019-06-27
dc.description.abstractCO2 capture by fixed-bed sorption has been evaluated using Supported Ionic Liquid Phase (SILP) based on the ionic liquid 1-butyl-3-methylimidazolium acetate ([bmim][acetate]). The SILP sorbent was prepared with three remarkably different mean particle sizes and characterized by porous texture, morphology, thermal stability, and elemental composition. The thermodynamics and kinetics of the CO2 capture process has been studied, testing the effects of SILP particle size, sorption temperature, gas flow rate, and CO2 partial pressure. The CO2 sorption isotherms at different temperatures were obtained by gravimetric measurements, revealing that the equilibrium sorption capacity is only due to the IL incorporated on the silica support of SILP. The experimental isotherms were successfully fitted to the Langmuir−Freundlich model. Fixed-bed experiments of CO2 capture were carried out to evaluate the performance of the SILP sorbents at different operating conditions. All the breakthrough curves were well described by a linear driving force model. The obtained kinetic coefficients revealed that the CO2 sorption rate in fixed-bed linearly increases when decreasing the SILP particle size and increasing the operating temperature. Higher CO2 partial pressure in the inlet gas stream led to a faster mass transfer rate, affecting both the mass transfer driving force and kinetic coefficient. Aspen Adsorption simulator was successfully applied to model the fixed-bed operation, highlighting the role of the particle size on separation efficiency. Simulations results indicate that at very low CO2 partial pressure chemical absorption is the controlling step, while increasing that partial pressure shifts the regime toward diffusion into the SILP. This methodology will allow designing CO2 sorption systems based on SILPs that fulfill the separation requirements at given conditions (CO2 partial pressure and temperature), minimizing the SILP needs by optimizing the particle size and type of IL.en
dc.description.versionversión final
dc.identifier.doi10.1021/acssuschemeng.9b02277
dc.identifier.issn13089–13097
dc.identifier.urihttps://hdl.handle.net/20.500.14468/12392
dc.journal.issue15
dc.journal.volume7
dc.relation.centerE.T.S. de Ingenieros Industriales
dc.relation.departmentIngeniería Eléctrica, Electrónica, Control, Telemática y Química Aplicada a la Ingeniería
dc.subject.keywordsCO2 capture
dc.subject.keywordsIonic liquids
dc.subject.keywordsSILP
dc.subject.keywordsFixed-bed
dc.subject.keywordsParticle size
dc.subject.keywordsKinetics
dc.titleCO2 Capture by Supported Ionic Liquid Phase: Highlighting the Role of the Particle Sizees
dc.typeartículoes
dc.typejournal articleen
dspace.entity.typePublication
relation.isAuthorOfPublicationbfdcfb75-60b5-42a3-969d-538d9c6f42bc
relation.isAuthorOfPublication.latestForDiscoverybfdcfb75-60b5-42a3-969d-538d9c6f42bc
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