Artículo
Characterization of the PSD of activated carbons from peach stones for separation of combustion gas mixtures
Soares Maia, Debora Aline
; Alexandre de Oliveira, José Carlos
; Toso, Juan Pablo; Sapag, Manuel Karim
; López, Raúl Horacio
; Azevedo, Diana C. S.; Cavalcante Jr., Célio L.; Zgrablich, Jorge Andres
Fecha de publicación:
02/2011
Editorial:
Springer
Revista:
Adsorption
ISSN:
0929-5607
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Controlled series of microporous carbons were prepared through chemical activation with phosphoric acid from peach stones as the precursor material, corresponding to different preparation conditions. Adsorption isotherms of N2 at 77 K and of CO2 at 273 K were measured to be used in the characterization of the samples. The recently proposed mixed-geometry model (MGM), which assumes that the activated carbon is better represented by a mixture of slit and triangular geometry pores, is used to obtain the PSDs of the samples, on the basis of Grand Canonical Monte Carlo (GCMC) simulated ideal isotherms, both for N2 at 77 K and of CO2 at 273 K. Our results emerging from the analysis of two families of activated carbons reveal a consistent picture supporting the thesis that the PSDs of the same sample obtained trough N2 and CO2 adsorption are different, a still controversial issue in the literature. Comparison of predictions from the MGM with those of the pure slit geometry model (PSGM) shows that the former gives a more consistent picture and more similar PSDs for the two adsorbates used.
Palabras clave:
Activated Carbon
,
Pore Size Distribution
,
Slit Geometry
,
Triangular Geometry
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Articulos(INFAP)
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Citación
Soares Maia, Debora Aline; Alexandre de Oliveira, José Carlos; Toso, Juan Pablo; Sapag, Manuel Karim; López, Raúl Horacio; et al.; Characterization of the PSD of activated carbons from peach stones for separation of combustion gas mixtures; Springer; Adsorption; 17; 5; 2-2011; 853-861
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