English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/61388
Share/Impact:
Statistics
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:

Title

Molecular basis of carbon dioxide transport in polycarbonate membranes

AuthorsGarrido, Leoncio ; Lopez-Gonzalez, Mar; Saiz, Enrique; Riande, Evaristo
Issue Date2008
PublisherAmerican Chemical Society
CitationJournal of Physical Chemistry B 112 (14) : 4253–4260 (2008)
AbstractGas transport of carbon dioxide in poly[bisphenol A carbonate-co-4,4¢-(3,3,5-trimethylcyclohexylidene)diphenol carbonate] films over a wide range of pressure is described. The interpretation of the experimental results in terms of the dual mode model allowed the evaluation of the parameters of the model that govern the gas permeation process. The value of the diffusion coefficient obtained for carbon dioxide at zero concentration was 2.4 10-8 cm2 s-1, at 303 K. This parameter was also measured by using pulsed field gradient NMR finding that its value reaches a nearly constant value of (2.7 ( 0.9) 10-8 cm2 s-1, at 298 K, for diffusion times greater than 20 ms. Both the diffusion and solubility coefficients were also computed by using simulation methods based on the transition states theory and the Widom method, respectively. The value obtained for the diffusion coefficient was 1.8 10-8 cm2 s-1, at 303 K, which compares very favorably with the experimental measurements. The drop of the simulated solubility coefficient with increasing pressure is sharper than that of the experimental one, at low pressures, and similar, at high pressures.
Publisher version (URL)http://dx.doi.org/10.1021/jp711080h
URIhttp://hdl.handle.net/10261/61388
DOI10.1021/jp711080h
ISSN1520-6106
Appears in Collections:(ICTP) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.