Post-combustion CO2 adsorption on activated carbons with different textural properties
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Título: | Post-combustion CO2 adsorption on activated carbons with different textural properties |
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Autor/es: | Montagnaro, Fabio | Silvestre Albero, Ana | Silvestre-Albero, Joaquín | Rodríguez Reinoso, Francisco | Erto, Alessandro | Lancia, Amedeo | Balsamo, Marco |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Carbon dioxide | Adsorption | Activated carbon | Fixed bed | Intraparticle diffusion |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | jun-2015 |
Editor: | Elsevier |
Cita bibliográfica: | Microporous and Mesoporous Materials. 2015, 209: 157-164. doi:10.1016/j.micromeso.2014.09.037 |
Resumen: | Fixed bed CO2 adsorption tests were carried out in model flue-gas streams onto two commercial activated carbons, namely Filtrasorb 400 and Nuchar RGC30, at 303 K, 323 K and 353 K. Thermodynamic adsorption results highlighted that the presence of a narrower micropore size distribution with a prevailing contribution of very small pore diameters, observed for Filtrasorb 400, is a key factor in determining a higher CO2 capture capacity, mostly at low temperature. These experimental evidences were also corroborated by the higher value of the isosteric heat derived for Filtrasorb 400, testifying stronger interactions with CO2 molecules with respect to Nuchar RGC30. Dynamic adsorption results on the investigated sorbents highlighted the important role played by both a greater contribution of mesopores and the presence of wider micropores for Nuchar RGC30 in establishing faster capture kinetics with respect to Filtrasorb 400, in particular at 303 K. Furthermore, the modeling analysis of 15% CO2 breakthrough curves allowed identifying intraparticle diffusion as the rate-determining step of the process. |
URI: | http://hdl.handle.net/10045/57840 |
ISSN: | 1387-1811 (Print) | 1873-3093 (Online) |
DOI: | 10.1016/j.micromeso.2014.09.037 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2014 Elsevier Inc. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.micromeso.2014.09.037 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
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2015_Montagnaro_etal_MicroMeso_final.pdf | Versión final (acceso restringido) | 918,56 kB | Adobe PDF | Abrir Solicitar una copia |
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