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High - pressure differential scanning calorimetry measurements of the mass transfer resistance across a methane hydrate film as a function of time and subcooling / Simon R. Davies in Industrial & engineering chemistry research, Vol. 49 N° 23 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12319–12326 Titre : High - pressure differential scanning calorimetry measurements of the mass transfer resistance across a methane hydrate film as a function of time and subcooling Type de document : texte imprimé Auteurs : Simon R. Davies, Auteur ; Jason W. Lachance, Auteur ; E. Dendy Sloan, Auteur Année de publication : 2011 Article en page(s) : pp. 12319–12326 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Mass  transfer  Methane Résumé : High pressure differential scanning calorimetry was utilized to study the mass transfer rates across methane hydrate films grown at hydrocarbon−water interfaces in a quiescent system, as a function of subcooling and the age of the film. Gas hydrate films formed at such interfaces provide a substantial barrier to further gas hydrate formation. The initially high mass transfer rates across the gas hydrate films formed at gas−water interfaces confirmed that the films were porous in nature containing varying degrees of porosity, with the films requiring up to >24 h to anneal. Conversely, films formed at water−liquid hydrocarbon interfaces exhibited much lower mass transfer rates. The mass transfer rate is also dependent on the formation conditions of the film and is at a maximum at around 22 K of subcooling. This maximum appears to be independent of gas hydrate structure and pressure. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1017173 [article] High - pressure differential scanning calorimetry measurements of the mass transfer resistance across a methane hydrate film as a function of time and subcooling [texte imprimé] / Simon R. Davies, Auteur ; Jason W. Lachance, Auteur ; E. Dendy Sloan, Auteur . - 2011 . - pp. 12319–12326. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12319–12326 Mots-clés : Mass  transfer  Methane Résumé : High pressure differential scanning calorimetry was utilized to study the mass transfer rates across methane hydrate films grown at hydrocarbon−water interfaces in a quiescent system, as a function of subcooling and the age of the film. Gas hydrate films formed at such interfaces provide a substantial barrier to further gas hydrate formation. The initially high mass transfer rates across the gas hydrate films formed at gas−water interfaces confirmed that the films were porous in nature containing varying degrees of porosity, with the films requiring up to >24 h to anneal. Conversely, films formed at water−liquid hydrocarbon interfaces exhibited much lower mass transfer rates. The mass transfer rate is also dependent on the formation conditions of the film and is at a maximum at around 22 K of subcooling. This maximum appears to be independent of gas hydrate structure and pressure. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1017173