Comparison of methods to obtain micropore size distributions of carbonaceous materials from CO2 adsorption based on the dubinin − radushkevich isotherm / Moisés L. Pinto in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4726-4730 Titre : Comparison of methods to obtain micropore size distributions of carbonaceous materials from CO2 adsorption based on the dubinin − radushkevich isotherm Type de document : texte imprimé Auteurs : Moisés L. Pinto, Auteur ; Ana S. Mestre, Auteur ; Ana P. Carvalho, Auteur Année de publication : 2010 Article en page(s) : pp. 4726-4730 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorption Carbon dioxide Particle size distribution Microporosity Résumé : Micropore size distributions of various carbonaceous materials were obtained using two methods based on the Dubinin-Radushkevich equation and the relationship between the characteristic parameter of this equation and the pore width. One method was the well-known Dubinin-Radushkevich-Stoeckli (DRS) equation, and the other method used the integral adsorption equation without assuming a mathematical distribution for dw0/dE0. These methods were applied to carbon dioxide adsorption data on four activated carbons and eight chars to obtain micropore size distributions. Significant differences were found between the results obtained by the two methods. The DRS method gives an average of the distribution obtained by the method using the integral adsorption equation, because the latter is not constrained to a particular preassumed shape. The results reveal that the differences are more significant for the analysis of adsorption data on chars than on activated carbons. This was attributed to the fact that a less-homogeneous pore structure is expected to exist on chars than on activated carbons that cannot be described by the DRS method and can be described by the method based on the integral adsorption equation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22797466 [article] Comparison of methods to obtain micropore size distributions of carbonaceous materials from CO2 adsorption based on the dubinin − radushkevich isotherm [texte imprimé] / Moisés L. Pinto, Auteur ; Ana S. Mestre, Auteur ; Ana P. Carvalho, Auteur . - 2010 . - pp. 4726-4730. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4726-4730 Mots-clés : Adsorption Carbon dioxide Particle size distribution Microporosity Résumé : Micropore size distributions of various carbonaceous materials were obtained using two methods based on the Dubinin-Radushkevich equation and the relationship between the characteristic parameter of this equation and the pore width. One method was the well-known Dubinin-Radushkevich-Stoeckli (DRS) equation, and the other method used the integral adsorption equation without assuming a mathematical distribution for dw0/dE0. These methods were applied to carbon dioxide adsorption data on four activated carbons and eight chars to obtain micropore size distributions. Significant differences were found between the results obtained by the two methods. The DRS method gives an average of the distribution obtained by the method using the integral adsorption equation, because the latter is not constrained to a particular preassumed shape. The results reveal that the differences are more significant for the analysis of adsorption data on chars than on activated carbons. This was attributed to the fact that a less-homogeneous pore structure is expected to exist on chars than on activated carbons that cannot be described by the DRS method and can be described by the method based on the integral adsorption equation. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=22797466

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