Separation of C6 paraffins using zeolitic imidazolate frameworks / David Peralta in Industrial & engineering chemistry research, Vol. 51 N° 12 (Mars 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4692–4702 Titre : Separation of C6 paraffins using zeolitic imidazolate frameworks : Comparison with zeolite 5A Type de document : texte imprimé Auteurs : David Peralta, Auteur ; Gérald Chaplais, Auteur ; Angélique Simon-Masseron, Auteur Année de publication : 2012 Article en page(s) : pp. 4692–4702 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Paraffin isomers Zeolite Résumé : The separation of paraffin isomers is a very important topic in the petrochemical industry. Zeolite 5A is industrially used to sieve alkane isomers, but its pore size does not allow the separation of monobranched and dibranched alkanes by a kinetic mechanism. In this publication, we compare three ZIF materials in the separation of C6-paraffin isomers: ZIF-8, ZIF-76, and a new material called IM-22. The performance of the materials is evaluated by a breakthrough curve of binary mixtures of n-hexane, 3-methylpentane, and 2,2-dimethylbutane. We show that ZIF-8 is a very attractive alternative to zeolite 5A because it exhibits a high (kinetic) selectivity for the adsorption of linear alkanes and at the same time a high adsorption capacity. The new material IM-22, a ZIF with CHA topology, seems to be particularly suited for the separation of mono- and dibranched paraffin isomers. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202995g [article] Separation of C6 paraffins using zeolitic imidazolate frameworks : Comparison with zeolite 5A [texte imprimé] / David Peralta, Auteur ; Gérald Chaplais, Auteur ; Angélique Simon-Masseron, Auteur . - 2012 . - pp. 4692–4702. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4692–4702 Mots-clés : Paraffin isomers Zeolite Résumé : The separation of paraffin isomers is a very important topic in the petrochemical industry. Zeolite 5A is industrially used to sieve alkane isomers, but its pore size does not allow the separation of monobranched and dibranched alkanes by a kinetic mechanism. In this publication, we compare three ZIF materials in the separation of C6-paraffin isomers: ZIF-8, ZIF-76, and a new material called IM-22. The performance of the materials is evaluated by a breakthrough curve of binary mixtures of n-hexane, 3-methylpentane, and 2,2-dimethylbutane. We show that ZIF-8 is a very attractive alternative to zeolite 5A because it exhibits a high (kinetic) selectivity for the adsorption of linear alkanes and at the same time a high adsorption capacity. The new material IM-22, a ZIF with CHA topology, seems to be particularly suited for the separation of mono- and dibranched paraffin isomers. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202995g

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Synthesis of belite cement clinker of high hydraulic reactivity / Larbi Kacimi in Cement and concrete research, Vol. 39 N° 7 (Juillet 2009)  

Public ISBD [article]  inCement and concrete research > Vol. 39 N° 7 (Juillet 2009) . - pp. 559–565 Titre : Synthesis of belite cement clinker of high hydraulic reactivity Type de document : texte imprimé Auteurs : Larbi Kacimi, Auteur ; Angélique Simon-Masseron, Auteur ; Souria Salem, Auteur Année de publication : 2009 Article en page(s) : pp. 559–565 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Belite  Clinker  Reactivity  Mineralizer  Clinkerization Résumé : This study is concerned with the increase of the cooling rate of belite clinker, by using the water quenching for the chemical stabilization of reactive belite, which improves the hydraulic properties of this clinker. The addition of adequate mineralizers, as NaF and Fe2O3, contributes to the improvement of the clinker properties obtained at low burning temperature. X-ray fluorescence spectroscopy, X-ray diffraction analysis and optical microscopy were used to determine the chemical and mineralogical compositions of this clinker. The samples were analyzed by means of a scanning electronic microscope connected with an energy-dispersive X-ray spectrometer to detect the composition of the belite phase and its morphology. Physical and mechanical properties of this clinker cement were determined. The results show that the belite clinker obtained at 1150 °C, with lime saturation factor 0.67, is characterized by a great hydraulic reactivity, similar to that of the ordinary alite clinker. The addition of 2% of NaF and the water quenching improved the chemical, mineralogical and structural properties, while improving the cement hydraulic properties. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000891 [article] Synthesis of belite cement clinker of high hydraulic reactivity [texte imprimé] / Larbi Kacimi, Auteur ; Angélique Simon-Masseron, Auteur ; Souria Salem, Auteur . - 2009 . - pp. 559–565. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 7 (Juillet 2009) . - pp. 559–565 Mots-clés : Belite  Clinker  Reactivity  Mineralizer  Clinkerization Résumé : This study is concerned with the increase of the cooling rate of belite clinker, by using the water quenching for the chemical stabilization of reactive belite, which improves the hydraulic properties of this clinker. The addition of adequate mineralizers, as NaF and Fe2O3, contributes to the improvement of the clinker properties obtained at low burning temperature. X-ray fluorescence spectroscopy, X-ray diffraction analysis and optical microscopy were used to determine the chemical and mineralogical compositions of this clinker. The samples were analyzed by means of a scanning electronic microscope connected with an energy-dispersive X-ray spectrometer to detect the composition of the belite phase and its morphology. Physical and mechanical properties of this clinker cement were determined. The results show that the belite clinker obtained at 1150 °C, with lime saturation factor 0.67, is characterized by a great hydraulic reactivity, similar to that of the ordinary alite clinker. The addition of 2% of NaF and the water quenching improved the chemical, mineralogical and structural properties, while improving the cement hydraulic properties. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000891

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