Document Detail


Contribution to the evaluation of density of methane adsorbed on activated carbon.
MedLine Citation:
PMID:  16853615     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The adsorption isotherms of N(2) at -196 degrees C, CO(2) at 0 degrees C, and CH(4) at 25 degrees C on 35 activated carbons with a wide range of micropore volumes and pore size distributions have been compared to evaluate the density of adsorbed methane. Results indicate that methane is adsorbed in the micropores of the activated carbon with a density that is a function of the carbon porosity because methane is packed more compactly in narrow than in wide micropores. An experimental procedure is proposed to evaluate the density in both types of micropores as a function of pressure. Its application to these porous carbons indicates that density of adsorbed methane increases rapidly with pressure on narrow micropores, the increase becoming slower above 1.5 MPa. The value reached at 3 MPa is 0.21 g/cm(3), near that estimated as the limiting value, 0.23 g/cm(3). Density in wide micropores is low, 0.09 g/cm(3) at 3 MPa, but it continuously increases with pressure.
Authors:
Francisco Rodríguez-Reinoso; Cristina Almansa; Miguel Molina-Sabio
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  109     ISSN:  1520-6106     ISO Abbreviation:  J Phys Chem B     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2006-07-20     Completed Date:  2007-09-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  United States    
Other Details:
Languages:  eng     Pagination:  20227-31     Citation Subset:  -    
Affiliation:
Laboratorio de Materiales Avanzados, Departamento de Química Inorganica, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain. reinoso@ua.es
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