English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/134438
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Assessment of the Role of Micropore Size and N-Doping in CO2 Capture by Porous Carbons

AutorSevilla Solís, Marta ; Parra Soto, José Bernardo ; Fuertes Arias, Antonio Benito
Palabras claveAdsorption
CO2 capture
Fecha de publicación24-jun-2013
EditorAmerican Chemical Society
CitaciónACS Applied Materials and Interfaces 5: 6360-6368 (2013)
ResumenThe role of micropore size and N-doping in CO2 capture by microporous carbons has been investigated by analyzing the CO2 adsorption properties of two types of activated carbons with analogous textural properties: (a) N-free carbon microspheres and (b) N-doped carbon microspheres. Both materials exhibit a porosity made up exclusively of micropores ranging in size between <0.6 nm in the case of the pristine materials and up to 1.6 nm for the highly activated carbons (47% burnoff). The N-doped carbons possess ∼3 wt % of N heteroatoms that are incorporated into several types of functional groups (i.e., pyrrole/pyridone, pyridine, quaternary, and pyridine-N-oxide). Under conventional operation conditions (i.e., T ∼ 0–25 °C and PCO2 ∼ 0–1 bar), CO2 adsorption proceeds via a volume-filling mechanism, the size limit for volume-filling being ∼0.7–0.8 nm. Under these circumstances, the adsorption of CO2 by nonfunctionalized porous carbons is mainly determined by the volume of the micropores with a size below 0.8 nm. It was also observed that the CO2 capture capacities of undoped and N-doped carbons are analogous which shows that the nitrogen functionalities present in these N-doped samples do not influence CO2 adsorption. Taking into account the temperature invariance of the characteristic curve postulated by the Dubinin theory, we show that CO2 uptakes can be accurately predicted by using the adsorption data measured at just one temperature.
Versión del editorhttp://dx.doi.org/10.1021/am401423b
Aparece en las colecciones: (INCAR) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Assessment of the role_sevilla.pdf703,82 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.