Documents disponibles écrits par cet auteur

Can toluene or xylene form clathrate hydrates? / Amir H. Mohammadi in Industrial & engineering chemistry research, Vol. 48 N° 12 (Juin 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 12 (Juin 2009) . - pp. 5916–5918 Titre : Can toluene or xylene form clathrate hydrates? Type de document : texte imprimé Auteurs : Amir H. Mohammadi, Auteur ; Veronica Belandria, Auteur ; Richon, Dominique, Auteur Année de publication : 2009 Article en page(s) : pp. 5916–5918 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Toluene  p-xylene  Clathrate  hydrate  formation Résumé : In this communication, we examine the possibility of clathrate hydrate formation of toluene and o-, m-, or p-xylene with methane as help gas. An isochoric pressure-search method was used to measure hydrate phase equilibrium boundaries. The reliability of this method is tested by generating hydrate phase equilibrium boundary data for the methane−benzene−water system and comparing them with experimental data reported in the literature. The acceptable agreements demonstrate the reliability of the technique used in this work. The new experimental data of hydrate phase equilibrium boundary for the methane−(toluene/(o/m/p)-xylene)−water systems are compared with some selected experimental data from the literature for the methane−water system to study the possibility of shifting the hydrate phase equilibrium boundary of the latter system by the presence of toluene and o-, m-, or p-xylene. It is shown that toluene and o-, m-, or p-xylene have little or almost no effect on the hydrate phase equilibrium boundary of the methane−water system. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900362v [article] Can toluene or xylene form clathrate hydrates? [texte imprimé] / Amir H. Mohammadi, Auteur ; Veronica Belandria, Auteur ; Richon, Dominique, Auteur . - 2009 . - pp. 5916–5918. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 12 (Juin 2009) . - pp. 5916–5918 Mots-clés : Toluene  p-xylene  Clathrate  hydrate  formation Résumé : In this communication, we examine the possibility of clathrate hydrate formation of toluene and o-, m-, or p-xylene with methane as help gas. An isochoric pressure-search method was used to measure hydrate phase equilibrium boundaries. The reliability of this method is tested by generating hydrate phase equilibrium boundary data for the methane−benzene−water system and comparing them with experimental data reported in the literature. The acceptable agreements demonstrate the reliability of the technique used in this work. The new experimental data of hydrate phase equilibrium boundary for the methane−(toluene/(o/m/p)-xylene)−water systems are compared with some selected experimental data from the literature for the methane−water system to study the possibility of shifting the hydrate phase equilibrium boundary of the latter system by the presence of toluene and o-, m-, or p-xylene. It is shown that toluene and o-, m-, or p-xylene have little or almost no effect on the hydrate phase equilibrium boundary of the methane−water system. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900362v

Chrastil-type approach for representation of glycol loss in gaseous system / Ali Eslamimanesh in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10373-10379 Titre : Chrastil-type approach for representation of glycol loss in gaseous system Type de document : texte imprimé Auteurs : Ali Eslamimanesh, Auteur ; Amir H. Mohammadi, Auteur Année de publication : 2011 Article en page(s) : pp. 10373-10379 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Gaseous  System  Glycol Résumé : Glycols are generally used to adjust the water dew-point in natural gas processes to avoid gas hydrate/ice/condensate formation. Their vaporization loss in gaseous systems may happen regularly in the petroleum industry. Glycols have very low solubility in the gas phase and because of difficulty of the corresponding measurement, few sets of experimental data are available in open literature and may not be fully satisfactory. In a previous work, we performed thermodynamic consistency tests in order to prepare reliable data sets for modeling purposes. Application of four widely used correlations in supercritical fluid industry, including the original Chrastil, Adachi and Lu, del Valle and Aguilera, and Mendez-Santiago and Teja, in which the effects of temperature, density of gas (solvent), and pressures on the solubility of glycol are generally taken into account, are investigated to represent the corresponding solubility of ethylene glycol and triethylene glycol in supercritical methane and carbon dioxide between 298.15 and 333.15 K and between 1.606 and 22.06 MPa. It is found that the absolute average deviations (AAD %) of the evaluated glycols solubility by the aforementioned equations from 57 investigated experimental values are around 27%, 18%, 31%, and 17%, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2009839 [article] Chrastil-type approach for representation of glycol loss in gaseous system [texte imprimé] / Ali Eslamimanesh, Auteur ; Amir H. Mohammadi, Auteur . - 2011 . - pp. 10373-10379. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10373-10379 Mots-clés : Gaseous  System  Glycol Résumé : Glycols are generally used to adjust the water dew-point in natural gas processes to avoid gas hydrate/ice/condensate formation. Their vaporization loss in gaseous systems may happen regularly in the petroleum industry. Glycols have very low solubility in the gas phase and because of difficulty of the corresponding measurement, few sets of experimental data are available in open literature and may not be fully satisfactory. In a previous work, we performed thermodynamic consistency tests in order to prepare reliable data sets for modeling purposes. Application of four widely used correlations in supercritical fluid industry, including the original Chrastil, Adachi and Lu, del Valle and Aguilera, and Mendez-Santiago and Teja, in which the effects of temperature, density of gas (solvent), and pressures on the solubility of glycol are generally taken into account, are investigated to represent the corresponding solubility of ethylene glycol and triethylene glycol in supercritical methane and carbon dioxide between 298.15 and 333.15 K and between 1.606 and 22.06 MPa. It is found that the absolute average deviations (AAD %) of the evaluated glycols solubility by the aforementioned equations from 57 investigated experimental values are around 27%, 18%, 31%, and 17%, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2009839

Compositional analysis and hydrate dissociation conditions measurements for carbon dioxide + methane + water system / Veronica Belandria in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5783–5794 Titre : Compositional analysis and hydrate dissociation conditions measurements for carbon dioxide + methane + water system Type de document : texte imprimé Auteurs : Veronica Belandria, Auteur ; Ali Eslamimanesh, Auteur ; Amir H. Mohammadi, Auteur Année de publication : 2011 Article en page(s) : pp. 5783–5794 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Methane Résumé : A detailed description of an experimental setup based on the “static-analytic” technique with gas phase capillary sampling designed, built, and improved “in-house” to measure phase equilibria (pressure, temperature, and compositions) under gas hydrate formation conditions is presented in this work. The apparatus is suitable for measurements at temperatures ranging from 233 to 373 K and pressures up to 60 MPa. It was used to study phase equilibria in the carbon dioxide + methane + water system under hydrate formation conditions. An isochoric pressure-search method was used to measure hydrate dissociation conditions. The experimental data have been compared successfully with the literature data. The compositions of the gas phase in equilibrium with the hydrate and aqueous phases were measured using a gas chromatography technique and compared successfully with the literature data. The compositions of the hydrate and aqueous phases were determined by applying material balance equations. The experimental data on the compositions of the hydrate have been compared successfully with the literature data. To solve the latter equations, the Newton’s numerical method coupled with the differential evolution optimization strategy was employed. All the aforementioned experimental data (hydrate dissociation conditions + composition analyses) have been compared with the predictions of two thermodynamic models, namely CSMGem and HWHYD. A discussion is made on the reliability of the predictions of the latter models. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101959t [article] Compositional analysis and hydrate dissociation conditions measurements for carbon dioxide + methane + water system [texte imprimé] / Veronica Belandria, Auteur ; Ali Eslamimanesh, Auteur ; Amir H. Mohammadi, Auteur . - 2011 . - pp. 5783–5794. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5783–5794 Mots-clés : Carbon  dioxide  Methane Résumé : A detailed description of an experimental setup based on the “static-analytic” technique with gas phase capillary sampling designed, built, and improved “in-house” to measure phase equilibria (pressure, temperature, and compositions) under gas hydrate formation conditions is presented in this work. The apparatus is suitable for measurements at temperatures ranging from 233 to 373 K and pressures up to 60 MPa. It was used to study phase equilibria in the carbon dioxide + methane + water system under hydrate formation conditions. An isochoric pressure-search method was used to measure hydrate dissociation conditions. The experimental data have been compared successfully with the literature data. The compositions of the gas phase in equilibrium with the hydrate and aqueous phases were measured using a gas chromatography technique and compared successfully with the literature data. The compositions of the hydrate and aqueous phases were determined by applying material balance equations. The experimental data on the compositions of the hydrate have been compared successfully with the literature data. To solve the latter equations, the Newton’s numerical method coupled with the differential evolution optimization strategy was employed. All the aforementioned experimental data (hydrate dissociation conditions + composition analyses) have been compared with the predictions of two thermodynamic models, namely CSMGem and HWHYD. A discussion is made on the reliability of the predictions of the latter models. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101959t

Corresponding states method for estimation of upper flammability limit temperature of chemical compounds / Gharagheizi, Farhad in Industrial & engineering chemistry research, Vol. 51 N° 17 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6265–6269 Titre : Corresponding states method for estimation of upper flammability limit temperature of chemical compounds Type de document : texte imprimé Auteurs : Gharagheizi, Farhad, Auteur ; Poorandokht Ilani-Kashkouli, Auteur ; Amir H. Mohammadi, Auteur Année de publication : 2012 Article en page(s) : pp. 6265–6269 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Chemical  compounds  Flammability  limit Résumé : The accuracy and predictability of predictive methods to determine the flammability characteristics of chemical compounds are of drastic significance in the chemical industry. This work aims at continuing application of the gene expression programming (GEP) mathematical strategy to modify the existing thermophysical properties correlations available in the literature to pursue the following objectives: optimization of the number of independent parameters, amplification of the generality, and improvement of the accuracy and predictability. This work deals with presenting a simple corresponding states model to predict the upper flammability limit temperature of 1462 organic compounds from 76 chemical families. The parameters of the correlation include the critical temperature and the acentric factor of the compounds. The obtained statistical parameters including average absolute relative deviation of the results from DIPPR 801 database values (1.7, 1.8, 1.7% for training, optimization, and prediction sets, respectively) demonstrate improved accuracy of the presented correlations. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300375k [article] Corresponding states method for estimation of upper flammability limit temperature of chemical compounds [texte imprimé] / Gharagheizi, Farhad, Auteur ; Poorandokht Ilani-Kashkouli, Auteur ; Amir H. Mohammadi, Auteur . - 2012 . - pp. 6265–6269. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6265–6269 Mots-clés : Chemical  compounds  Flammability  limit Résumé : The accuracy and predictability of predictive methods to determine the flammability characteristics of chemical compounds are of drastic significance in the chemical industry. This work aims at continuing application of the gene expression programming (GEP) mathematical strategy to modify the existing thermophysical properties correlations available in the literature to pursue the following objectives: optimization of the number of independent parameters, amplification of the generality, and improvement of the accuracy and predictability. This work deals with presenting a simple corresponding states model to predict the upper flammability limit temperature of 1462 organic compounds from 76 chemical families. The parameters of the correlation include the critical temperature and the acentric factor of the compounds. The obtained statistical parameters including average absolute relative deviation of the results from DIPPR 801 database values (1.7, 1.8, 1.7% for training, optimization, and prediction sets, respectively) demonstrate improved accuracy of the presented correlations. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300375k

Determination of parachor of various compounds using an artificial neural network-group contribution method / Gharagheizi, Farhad in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5815-5823 Titre : Determination of parachor of various compounds using an artificial neural network-group contribution method Type de document : texte imprimé Auteurs : Gharagheizi, Farhad, Auteur ; Ali Eslamimanesh, Auteur ; Amir H. Mohammadi, Auteur Année de publication : 2011 Article en page(s) : pp. 5815-5823 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Group  contribution  method  Neural  network Résumé : In this communication, an Artificial Neural Network―Group Contribution algorithm is applied to represent/predict the parachor of pure chemical compounds. To propose a reliable and predictive tool, 227 pure chemical compounds are investigated. Using the developed method, we obtain satisfactory results that are quantified by the following statistical parameters: absolute average deviations of the represented/predicted parachor values from existing experimental ones, %AAD = 1.2%; and squared correlation coefficient, R2 = 0.997. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128707 [article] Determination of parachor of various compounds using an artificial neural network-group contribution method [texte imprimé] / Gharagheizi, Farhad, Auteur ; Ali Eslamimanesh, Auteur ; Amir H. Mohammadi, Auteur . - 2011 . - pp. 5815-5823. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5815-5823 Mots-clés : Group  contribution  method  Neural  network Résumé : In this communication, an Artificial Neural Network―Group Contribution algorithm is applied to represent/predict the parachor of pure chemical compounds. To propose a reliable and predictive tool, 227 pure chemical compounds are investigated. Using the developed method, we obtain satisfactory results that are quantified by the following statistical parameters: absolute average deviations of the represented/predicted parachor values from existing experimental ones, %AAD = 1.2%; and squared correlation coefficient, R2 = 0.997. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128707

Determination of sulfur content of various gases using chrastil-type equations / Ali Eslamimanesh in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

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Estimating Sulfur Content of Hydrog Sulfide at elevated temperatures and Pressures using an Atificial Neural Network Algorithm / Amir H. Mohammadi in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

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Experimental data assessment test for composition of vapor phase in equilibrium with gas hydrate and liquid water for carbon dioxide + methane or nitrogen + water system / Ali Eslamimanesh in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

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Extension of an artificial neural network algorithm for estimating sulfur content of sour gases at elevated temperatures and pressures / Mehdi Mehrpooya in Industrial & engineering chemistry research, Vol. 49 N° 1 (Janvier 2010) 

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Gas hydrate formation in carbon dioxide + nitrogen + water system / Veronica Belandria in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

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Gas hydrate phase equilibrium in porous media / Amir H. Mohammadi in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

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Gas hydrate phase equilibrium in the presence of ethylene glycol or methanol aqueous solution / Amir H. Mohammadi in Industrial & engineering chemistry research, Vol. 49 N° 18 (Septembre 2010) 

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Group contribution-based method for determination of solubility parameter of nonelectrolyte organic compounds / Gharagheizi, Farhad in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

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Ice−clathrate hydrate−gas phase equilibria for air, oxygen, nitrogen, carbon monoxide, methane, or ethane + water system / Amir H. Mohammadi in Industrial & engineering chemistry research, Vol. 49 N° 8 (Avril 2010) 

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Ice – clathrate hydrate – gas phase equilibria for argon + water and carbon dioxide + water systems / Amir H. Mohammadi in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

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