Documents disponibles écrits par cet auteur

Clathrate hydrates / Amadeu K. Sum in Industrial & engineering chemistry research, Vol. 48 N° 16 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7457–7465 Titre : Clathrate hydrates : from laboratory science to engineering practice Type de document : texte imprimé Auteurs : Amadeu K. Sum, Auteur ; Carolyn A. Koh, Auteur ; E. Dendy Sloan, Auteur Année de publication : 2009 Article en page(s) : pp. 7457–7465 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Clathrate  hydrates  Thermodynamics  Kinetics  Rheological  properties  Structural  properties Résumé : Clathrate hydrates have steadily emerged as an important field in the areas of flow assurance, energy storage and resource, and environment. To better understand the role of hydrates in all of these areas, knowledge developed in laboratory experiments must be effectively transferred to address the challenges related to hydrate formation, dissociation, agglomeration, and stability. This paper highlights the recent hydrate literature focusing on the thermodynamics, kinetics, structural properties, particle properties, rheological properties, and molecular mechanisms of formation. The foundation for continued understanding and development of hydrates in engineering practice will rely on laboratory measurements utilizing traditional and innovative tools capable of probing time-dependent and time-independent properties. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900679m [article] Clathrate hydrates : from laboratory science to engineering practice [texte imprimé] / Amadeu K. Sum, Auteur ; Carolyn A. Koh, Auteur ; E. Dendy Sloan, Auteur . - 2009 . - pp. 7457–7465. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7457–7465 Mots-clés : Clathrate  hydrates  Thermodynamics  Kinetics  Rheological  properties  Structural  properties Résumé : Clathrate hydrates have steadily emerged as an important field in the areas of flow assurance, energy storage and resource, and environment. To better understand the role of hydrates in all of these areas, knowledge developed in laboratory experiments must be effectively transferred to address the challenges related to hydrate formation, dissociation, agglomeration, and stability. This paper highlights the recent hydrate literature focusing on the thermodynamics, kinetics, structural properties, particle properties, rheological properties, and molecular mechanisms of formation. The foundation for continued understanding and development of hydrates in engineering practice will rely on laboratory measurements utilizing traditional and innovative tools capable of probing time-dependent and time-independent properties. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900679m

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

Measurement and calibration of droplet size distributions in water-in-oil emulsions by particle video microscope and a focused beam reflectance method / John A. Boxall in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010)

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1412–1418 Titre : Measurement and calibration of droplet size distributions in water-in-oil emulsions by particle video microscope and a focused beam reflectance method Type de document : texte imprimé Auteurs : John A. Boxall, Auteur ; Carolyn A. Koh, Auteur ; E. Dendy Sloan, Auteur Année de publication : 2010 Article en page(s) : pp. 1412–1418 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Measurement--Calibration--Droplet--Size--Distributions--Water-in-Oil--Emulsions--Particle  Video  Microscope--Focused--Reflectance  Method Résumé : Water droplet sizes in crude oil emulsions were measured using an in situ particle video microscope (PVM) probe and a focused beam reflectance measurement (FBRM) probe for a variety of oils spanning over two orders of magnitude in viscosity and for varying shear rates. The arithmetic or Sauter mean diameter was found to maintain the same constants of proportionality with the maximum (99th percentile) droplet size for different distributions, previously only shown for water-continuous emulsions. The FBRM values for the mean droplet size, while lower than the PVM values, could be related to the latter by an empirical quadratic relationship with an average error of less than 20%. The droplet size distribution was found to be represented well by a log-normal distribution with good agreement between correlated and measured mean droplet size. Following the agreement between the mean and maximum droplet sizes, the log-normal standard deviation was linearly related to the mean droplet size. The PVM probe was found to be a useful tool for determining droplet sizes in water-in-oil emulsions and as a calibration method for the FBRM probe. The droplet sizes measured provide a useful set of data for comparison with predictive models to determine the mean size or full droplet size distributions. ISSN : 0888-5885 [article] Measurement and calibration of droplet size distributions in water-in-oil emulsions by particle video microscope and a focused beam reflectance method [texte imprimé] / John A. Boxall, Auteur ; Carolyn A. Koh, Auteur ; E. Dendy Sloan, Auteur . - 2010 . - pp. 1412–1418. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 1412–1418 Mots-clés : Measurement--Calibration--Droplet--Size--Distributions--Water-in-Oil--Emulsions--Particle  Video  Microscope--Focused--Reflectance  Method Résumé : Water droplet sizes in crude oil emulsions were measured using an in situ particle video microscope (PVM) probe and a focused beam reflectance measurement (FBRM) probe for a variety of oils spanning over two orders of magnitude in viscosity and for varying shear rates. The arithmetic or Sauter mean diameter was found to maintain the same constants of proportionality with the maximum (99th percentile) droplet size for different distributions, previously only shown for water-continuous emulsions. The FBRM values for the mean droplet size, while lower than the PVM values, could be related to the latter by an empirical quadratic relationship with an average error of less than 20%. The droplet size distribution was found to be represented well by a log-normal distribution with good agreement between correlated and measured mean droplet size. Following the agreement between the mean and maximum droplet sizes, the log-normal standard deviation was linearly related to the mean droplet size. The PVM probe was found to be a useful tool for determining droplet sizes in water-in-oil emulsions and as a calibration method for the FBRM probe. The droplet sizes measured provide a useful set of data for comparison with predictive models to determine the mean size or full droplet size distributions. ISSN : 0888-5885