Hydrate equilibrium modeling for pure alkanes and mixtures of alkanes using statistical associating fluid theory / Hao Jiang in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12815-12823 Titre : Hydrate equilibrium modeling for pure alkanes and mixtures of alkanes using statistical associating fluid theory Type de document : texte imprimé Auteurs : Hao Jiang, Auteur ; Hertanto Adidharma, Auteur Année de publication : 2012 Article en page(s) : pp. 12815-12823 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Modeling Résumé : A recent version of Statistical Associating Fluid Theory, namely SAFT2, coupled with the van der Waals and Platteeuw model for the hydrate phase, is applied to represent the hydrate dissociation conditions for pure alkanes and their mixtures in systems without inhibitors. The proposed model is applied to both structure I and II hydrates at temperatures above and below the freezing point of water. For binary and ternary alkane mixtures, a correction factor with only one parameter is introduced to the model. The results indicate that, for these uninhibited systems, the proposed model predicts the hydrate dissociation conditions well and captures the effect of concentration on the dissociation pressure well. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745757 [article] Hydrate equilibrium modeling for pure alkanes and mixtures of alkanes using statistical associating fluid theory [texte imprimé] / Hao Jiang, Auteur ; Hertanto Adidharma, Auteur . - 2012 . - pp. 12815-12823. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12815-12823 Mots-clés : Modeling Résumé : A recent version of Statistical Associating Fluid Theory, namely SAFT2, coupled with the van der Waals and Platteeuw model for the hydrate phase, is applied to represent the hydrate dissociation conditions for pure alkanes and their mixtures in systems without inhibitors. The proposed model is applied to both structure I and II hydrates at temperatures above and below the freezing point of water. For binary and ternary alkane mixtures, a correction factor with only one parameter is introduced to the model. The results indicate that, for these uninhibited systems, the proposed model predicts the hydrate dissociation conditions well and captures the effect of concentration on the dissociation pressure well. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745757

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Modeling of hydrate dissociation conditions for alkanes in the presence of single and mixed electrolyte solutions using ion - based statistical associating fluid theory / Hao Jiang in Industrial & engineering chemistry research, Vol. 51 N° 16 (Avril 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 16 (Avril 2012) . - pp. 5818–5825 Titre : Modeling of hydrate dissociation conditions for alkanes in the presence of single and mixed electrolyte solutions using ion - based statistical associating fluid theory Type de document : texte imprimé Auteurs : Hao Jiang, Auteur ; Hertanto Adidharma, Auteur Année de publication : 2012 Article en page(s) : pp. 5818–5825 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Electrolyte Fluid theory Résumé : Ion-based statistical associating fluid theory (SAFT2), coupled with the van der Waals and Platteeuw model for hydrate phase, is applied to describe the hydrate dissociation conditions for methane, ethane, and propane in the presence of single and mixed electrolyte solutions containing NaCl, KCl, and CaCl2. The model, which can be conveniently applied to mixed electrolyte solutions, is found to provide accurate predictions of the hydrate inhibition effects of these electrolyte solutions. The effect of different salt concentrations on the alkane hydrate dissociation conditions is also well-captured. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300170w [article] Modeling of hydrate dissociation conditions for alkanes in the presence of single and mixed electrolyte solutions using ion - based statistical associating fluid theory [texte imprimé] / Hao Jiang, Auteur ; Hertanto Adidharma, Auteur . - 2012 . - pp. 5818–5825. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 16 (Avril 2012) . - pp. 5818–5825 Mots-clés : Electrolyte Fluid theory Résumé : Ion-based statistical associating fluid theory (SAFT2), coupled with the van der Waals and Platteeuw model for hydrate phase, is applied to describe the hydrate dissociation conditions for methane, ethane, and propane in the presence of single and mixed electrolyte solutions containing NaCl, KCl, and CaCl2. The model, which can be conveniently applied to mixed electrolyte solutions, is found to provide accurate predictions of the hydrate inhibition effects of these electrolyte solutions. The effect of different salt concentrations on the alkane hydrate dissociation conditions is also well-captured. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300170w

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Selective depression of diaspore with waxy maize starch / Haipu Li in Minerals engineering, Vol. 23 N° 15 (Décembre 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 15 (Décembre 2010) . - pp. 1192–1197 Titre : Selective depression of diaspore with waxy maize starch Type de document : texte imprimé Auteurs : Haipu Li, Auteur ; Shasha Zhang, Auteur ; Hao Jiang, Auteur Année de publication : 2011 Article en page(s) : pp. 1192–1197 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Diasporic bauxite Reverse flotation Selective depression Waxy maize starch Résumé : Highly branched waxy maize starch (WMS) was used to separate diaspore from artificial mixtures of diaspore and kaolinite by microflotation using dodecylamine (DDA) as collector. It was found that WMS depressed the diaspore flotation while activated the kaolinite flotation more or less. The adsorption of WMS on diaspore was examined through adsorption test, zeta potential measurement, infrared spectroscopy, and atomic force microscopy. It is suggested that both chemical interaction and intermolecular hydrogen bonding by hydroxyl groups of starch with surface Al–OH moieties occurred in the adsorption. Results obtained from the adsorption of DDA and WMS on diaspore showed that starch virtually enhanced the DDA adsorption. The depressant action of WMS can be rationalized primarily by the formation of hydrophilic adsorption layer enveloping the surface of diaspore and covering the collector. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510002013 [article] Selective depression of diaspore with waxy maize starch [texte imprimé] / Haipu Li, Auteur ; Shasha Zhang, Auteur ; Hao Jiang, Auteur . - 2011 . - pp. 1192–1197. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 15 (Décembre 2010) . - pp. 1192–1197 Mots-clés : Diasporic bauxite Reverse flotation Selective depression Waxy maize starch Résumé : Highly branched waxy maize starch (WMS) was used to separate diaspore from artificial mixtures of diaspore and kaolinite by microflotation using dodecylamine (DDA) as collector. It was found that WMS depressed the diaspore flotation while activated the kaolinite flotation more or less. The adsorption of WMS on diaspore was examined through adsorption test, zeta potential measurement, infrared spectroscopy, and atomic force microscopy. It is suggested that both chemical interaction and intermolecular hydrogen bonding by hydroxyl groups of starch with surface Al–OH moieties occurred in the adsorption. Results obtained from the adsorption of DDA and WMS on diaspore showed that starch virtually enhanced the DDA adsorption. The depressant action of WMS can be rationalized primarily by the formation of hydrophilic adsorption layer enveloping the surface of diaspore and covering the collector. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510002013

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