Documents disponibles écrits par cet auteur

Characterization of CO2 hydrate formation and dissociation kinetics in a flow loop / Salem Jerbi in International journal of refrigeration, Vol. 33 N° 8 (Décembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 8 (Décembre 2010) . - pp. 1625-1631 Titre : Characterization of CO2 hydrate formation and dissociation kinetics in a flow loop Titre original : Caractérisation des cinétiques de formation et de dissociation des hydrates de CO2 dans une boucle de circulation Type de document : texte imprimé Auteurs : Salem Jerbi, Auteur ; Anthony Delahaye, Auteur ; Laurence Fournaison, Auteur Année de publication : 2011 Article en page(s) : pp. 1625-1631 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Kinetics  Formation  Dissociation  CO2  hydrate  Additives  Experimental  loop Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this work is to investigate CO2 hydrate formation and dissociation kinetics in the aim of designing a circulation loop with heat exchangers for secondary refrigeration applications. The formation of gas hydrates is a crystallization process which requires a supersaturated environment. The majority of the experimental formation data from the literature were obtained in semi-batch stirred tank. It was found that the hydrate growth for CO2 hydrate formation was approximately 1.8 × 10−3 %hydrate.s−1 for a stirring velocity about 450 rpm. The study reveals that for our system, an isothermal circulation loop, the kinetic varied from 4.3 × 10−3 to 8.3 × 10−3 %hydrate s−1, respectively for two protocols with water and water-additives selected for their dispersive and promoter properties. The first results of CO2 hydrate dissociation kinetics with or without additives were equivalent with various systems (semi-batch stirred tank reactor or loop) with approximately 5 × 10−3 %hydrate s−1. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002070 [article] Characterization of CO2 hydrate formation and dissociation kinetics in a flow loop = Caractérisation des cinétiques de formation et de dissociation des hydrates de CO2 dans une boucle de circulation [texte imprimé] / Salem Jerbi, Auteur ; Anthony Delahaye, Auteur ; Laurence Fournaison, Auteur . - 2011 . - pp. 1625-1631. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 8 (Décembre 2010) . - pp. 1625-1631 Mots-clés : Kinetics  Formation  Dissociation  CO2  hydrate  Additives  Experimental  loop Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this work is to investigate CO2 hydrate formation and dissociation kinetics in the aim of designing a circulation loop with heat exchangers for secondary refrigeration applications. The formation of gas hydrates is a crystallization process which requires a supersaturated environment. The majority of the experimental formation data from the literature were obtained in semi-batch stirred tank. It was found that the hydrate growth for CO2 hydrate formation was approximately 1.8 × 10−3 %hydrate.s−1 for a stirring velocity about 450 rpm. The study reveals that for our system, an isothermal circulation loop, the kinetic varied from 4.3 × 10−3 to 8.3 × 10−3 %hydrate s−1, respectively for two protocols with water and water-additives selected for their dispersive and promoter properties. The first results of CO2 hydrate dissociation kinetics with or without additives were equivalent with various systems (semi-batch stirred tank reactor or loop) with approximately 5 × 10−3 %hydrate s−1. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002070

Rheological properties of CO2 hydrate slurry flow in the presence of additives / Anthony Delahaye in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8344-8353 Titre : Rheological properties of CO2 hydrate slurry flow in the presence of additives Type de document : texte imprimé Auteurs : Anthony Delahaye, Auteur ; Laurence Fournaison, Auteur ; Salem Jerbi, Auteur Année de publication : 2011 Article en page(s) : pp. 8344-8353 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Additive  Particle  suspension  Multiphase  flow  Carbon  dioxide  Rheological  properties Résumé : This work investigates the flow properties of CO2 hydrate slurry in dynamic loop in the presence of additives (surfactants, antiagglomerants) for use as two-phase secondary refrigerant. To be considered as suitable for refrigeration systems, the use of hydrate slurries must overcome instability phenomena such as hydrate particle agglomeration. The additives were employed in the present work to prevent this phenomena, and thus to improve the stability and the homogeneity of the fluid. A multicriterion approach was used to select additive and to define the optimal operating conditions for its use. The selected additive was an EO/PO block copolymer. The flow properties of CO2 hydrate slurry in aqueous media in the presence of this additive were then measured in an experimental loop. It was possible to model the rheological behavior of the CO2 hydrate slurry in the presence of EO/PO block copolymer by an Newtonian-type equation. The present results were compared to previous results obtained without additive. This article provides new information on CO2-hydrate slurry rheology, which is important not only in the development of hydrate-based refrigeration systems, but also in the field of flow assurance in oil and gas pipelines or for other applications such as gas purification and storage processes using clathrate hydrates. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332161 [article] Rheological properties of CO2 hydrate slurry flow in the presence of additives [texte imprimé] / Anthony Delahaye, Auteur ; Laurence Fournaison, Auteur ; Salem Jerbi, Auteur . - 2011 . - pp. 8344-8353. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8344-8353 Mots-clés : Additive  Particle  suspension  Multiphase  flow  Carbon  dioxide  Rheological  properties Résumé : This work investigates the flow properties of CO2 hydrate slurry in dynamic loop in the presence of additives (surfactants, antiagglomerants) for use as two-phase secondary refrigerant. To be considered as suitable for refrigeration systems, the use of hydrate slurries must overcome instability phenomena such as hydrate particle agglomeration. The additives were employed in the present work to prevent this phenomena, and thus to improve the stability and the homogeneity of the fluid. A multicriterion approach was used to select additive and to define the optimal operating conditions for its use. The selected additive was an EO/PO block copolymer. The flow properties of CO2 hydrate slurry in aqueous media in the presence of this additive were then measured in an experimental loop. It was possible to model the rheological behavior of the CO2 hydrate slurry in the presence of EO/PO block copolymer by an Newtonian-type equation. The present results were compared to previous results obtained without additive. This article provides new information on CO2-hydrate slurry rheology, which is important not only in the development of hydrate-based refrigeration systems, but also in the field of flow assurance in oil and gas pipelines or for other applications such as gas purification and storage processes using clathrate hydrates. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332161

Rheological properties of CO2 hydrate slurry produced in a stirred tank reactor and a secondary refrigeration loop / Salem Jerbi in International journal of refrigeration, Vol. 36 N° 4 (Juin 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 4 (Juin 2013) . - pp. 1294–1301 Titre : Rheological properties of CO2 hydrate slurry produced in a stirred tank reactor and a secondary refrigeration loop Titre original : Propriétés rhéologiques d'un coulis d'hydrate de CO2 produit dans un bac sous agitation et une boucle secondaire Type de document : texte imprimé Auteurs : Salem Jerbi, Auteur ; Anthony Delahaye, Auteur ; Jérémy Oignet, Auteur Année de publication : 2013 Article en page(s) : pp. 1294–1301 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Carbon  dioxide  hydrates;  Phase  change;  Slurries;  Rheology;  Multiphase  flow;  Refrigeration Résumé : The aim of this paper is to present the rheological properties of CO2 hydrate slurry for a use as secondary fluids in refrigeration systems. A set-up composed of a stirred tank reactor and a circulation loop was used to study CO2 hydrate slurry formation and flowing. Rheological properties of CO2 hydrate slurries circulating in the loop were determined by the capillary viscometer method. The results show a shear thinning behaviour of the CO2 hydrate slurries for a solid fraction up to 22%. This behaviour is correlated by an Ostwald-de-Waele empirical equation, which takes into account the hydrate fraction of the slurry. The apparent viscosity of CO2 hydrate slurry was estimated from the model and a good agreement was found with the experimental data. A comparison with literature shows the importance of using a stirred reactor for slurry homogenisation, which allows the decrease of the apparent viscosity of the slurry. En ligne : http://www.sciencedirect.com/science/article/pii/S014070071200360X [article] Rheological properties of CO2 hydrate slurry produced in a stirred tank reactor and a secondary refrigeration loop = Propriétés rhéologiques d'un coulis d'hydrate de CO2 produit dans un bac sous agitation et une boucle secondaire [texte imprimé] / Salem Jerbi, Auteur ; Anthony Delahaye, Auteur ; Jérémy Oignet, Auteur . - 2013 . - pp. 1294–1301. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 4 (Juin 2013) . - pp. 1294–1301 Mots-clés : Carbon  dioxide  hydrates;  Phase  change;  Slurries;  Rheology;  Multiphase  flow;  Refrigeration Résumé : The aim of this paper is to present the rheological properties of CO2 hydrate slurry for a use as secondary fluids in refrigeration systems. A set-up composed of a stirred tank reactor and a circulation loop was used to study CO2 hydrate slurry formation and flowing. Rheological properties of CO2 hydrate slurries circulating in the loop were determined by the capillary viscometer method. The results show a shear thinning behaviour of the CO2 hydrate slurries for a solid fraction up to 22%. This behaviour is correlated by an Ostwald-de-Waele empirical equation, which takes into account the hydrate fraction of the slurry. The apparent viscosity of CO2 hydrate slurry was estimated from the model and a good agreement was found with the experimental data. A comparison with literature shows the importance of using a stirred reactor for slurry homogenisation, which allows the decrease of the apparent viscosity of the slurry. En ligne : http://www.sciencedirect.com/science/article/pii/S014070071200360X