Documents disponibles écrits par cet auteur

Prediction of water percolation threshold of a microemulsion uising electrical conductivity measurements and design of experiments / Zahra Jeirani in Industrial & engineering chemistry research, Vol. 51 N° 30 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10147-10155 Titre : Prediction of water percolation threshold of a microemulsion uising electrical conductivity measurements and design of experiments Type de document : texte imprimé Auteurs : Zahra Jeirani, Auteur ; Badrul Mohamed Jan, Auteur ; Brahim Si Ali, Auteur Année de publication : 2012 Article en page(s) : pp. 10147-10155 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Experimental  design  Electrical  conductivity  Microemulsion  Prédiction Résumé : This paper presents the estimation of water percolation threshold (φc) of a nonionic microemulsion by studying its conductivity (σ) as a function of water volume fraction (φ). The initial solution of alkyl polyglycosides/glyceryl monooleate/ n-octane/isopropyl alcohol with weight ratios of 3/3/2/2 was diluted by brine (1 wt % sodium chroride), and the electrical conductance was measured along the specific dilution line. One factor design (OFD), which is an approach embedded in Design of Experiments (DOE), was used to model the variation of d(logσ)/dφ with φ. A quadratic equation with natural logarithm transformation was then fitted and validated. The model was optimized to predict φc, the water volume fraction at which d(logσ)/dφ is a maximum. The predicted value of φc from the optimization of the model is 0.1245. In addition, fitting to the scaling law was conducted, and the value of φc from this theoretical model was 0.1212. Apparently, these values are in excellent agreement It is concluded that DOE can be used to estimate the value of φc for a microemulsion relatively precisely with less computation and restriction compared to the conventional fitting approach. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201430 [article] Prediction of water percolation threshold of a microemulsion uising electrical conductivity measurements and design of experiments [texte imprimé] / Zahra Jeirani, Auteur ; Badrul Mohamed Jan, Auteur ; Brahim Si Ali, Auteur . - 2012 . - pp. 10147-10155. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10147-10155 Mots-clés : Experimental  design  Electrical  conductivity  Microemulsion  Prédiction Résumé : This paper presents the estimation of water percolation threshold (φc) of a nonionic microemulsion by studying its conductivity (σ) as a function of water volume fraction (φ). The initial solution of alkyl polyglycosides/glyceryl monooleate/ n-octane/isopropyl alcohol with weight ratios of 3/3/2/2 was diluted by brine (1 wt % sodium chroride), and the electrical conductance was measured along the specific dilution line. One factor design (OFD), which is an approach embedded in Design of Experiments (DOE), was used to model the variation of d(logσ)/dφ with φ. A quadratic equation with natural logarithm transformation was then fitted and validated. The model was optimized to predict φc, the water volume fraction at which d(logσ)/dφ is a maximum. The predicted value of φc from the optimization of the model is 0.1245. In addition, fitting to the scaling law was conducted, and the value of φc from this theoretical model was 0.1212. Apparently, these values are in excellent agreement It is concluded that DOE can be used to estimate the value of φc for a microemulsion relatively precisely with less computation and restriction compared to the conventional fitting approach. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201430

Viscoplastic modeling of a novel lightweight biopolymer drilling fluid for underbalanced drilling / Munawar Khalil in Industrial & engineering chemistry research, Vol. 51 N° 10 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 4056–4068 Titre : Viscoplastic modeling of a novel lightweight biopolymer drilling fluid for underbalanced drilling Type de document : texte imprimé Auteurs : Munawar Khalil, Auteur ; Badrul Mohamed Jan, Auteur Année de publication : 2012 Article en page(s) : pp. 4056–4068 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Viscoplastic  Biopolymer Résumé : This paper presents a concise investigation of viscoplastic behavior of a novel lightweight biopolymer drilling fluid. Eight different rheological models namely the Bingham plastic model, Ostwald–De–Weale model, Herschel–Bulkley model, Casson model, Sisko model, Robertson–Stiff model, Heinz–Casson model, and Mizhari–Berk model were used to fit the experimental data. The effect of concentration of clay, glass bubbles, starch, and xanthan gum on the fluid rheological properties was investigated. Results show that the fitting process is able to successfully predict the rheological behavior of the fluid very well. The predicted values calculated from the best selected model are in a good agreement with the experimental data both in low and high (1500 s–1) rate of shear. The result also indicated that the presence of clay, glass bubbles, and xanthan gum have significantly changed the fluid behavior, while the presence of starch has not. Results also showed that all of the tested fluid seems to follow pseudoplastic behavior except for the following three tested fluids: one is fluid with the absence of clay, second and third is fluids with no glass bubble or xanthan gum, respectively. The first fluid tends to follows a Newtonian behavior, while the other two fluids tend to follow dilatants behavior. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200811z [article] Viscoplastic modeling of a novel lightweight biopolymer drilling fluid for underbalanced drilling [texte imprimé] / Munawar Khalil, Auteur ; Badrul Mohamed Jan, Auteur . - 2012 . - pp. 4056–4068. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 4056–4068 Mots-clés : Viscoplastic  Biopolymer Résumé : This paper presents a concise investigation of viscoplastic behavior of a novel lightweight biopolymer drilling fluid. Eight different rheological models namely the Bingham plastic model, Ostwald–De–Weale model, Herschel–Bulkley model, Casson model, Sisko model, Robertson–Stiff model, Heinz–Casson model, and Mizhari–Berk model were used to fit the experimental data. The effect of concentration of clay, glass bubbles, starch, and xanthan gum on the fluid rheological properties was investigated. Results show that the fitting process is able to successfully predict the rheological behavior of the fluid very well. The predicted values calculated from the best selected model are in a good agreement with the experimental data both in low and high (1500 s–1) rate of shear. The result also indicated that the presence of clay, glass bubbles, and xanthan gum have significantly changed the fluid behavior, while the presence of starch has not. Results also showed that all of the tested fluid seems to follow pseudoplastic behavior except for the following three tested fluids: one is fluid with the absence of clay, second and third is fluids with no glass bubble or xanthan gum, respectively. The first fluid tends to follows a Newtonian behavior, while the other two fluids tend to follow dilatants behavior. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200811z