Documents disponibles écrits par cet auteur

Kinetic study of a novel active and stable catalyst for the water gas shift reaction / Carolina A. Cornaglia in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4381–4389 Titre : Kinetic study of a novel active and stable catalyst for the water gas shift reaction Type de document : texte imprimé Auteurs : Carolina A. Cornaglia, Auteur ; John F. Munera, Auteur ; Eduardo A. Lombardo, Auteur Année de publication : 2011 Article en page(s) : pp. 4381–4389 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetic  Gas Résumé : Two types of catalysts were synthesized and used in the Water Gas Shift Reaction (WGSR): Rh/La2O3 and Rh/La2O3-SiO2. The fresh and used catalysts were characterized through X-ray diffraction (XRD), laser raman spectroscopy (LRS), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The stability tests performed at 673 K (50 h time-on-stream) showed that the Rh/La2O3 slowly deactivated while Rh/La2O3-SiO2 exhibited high stability at least for 50 h on stream. The instrumental techniques offered some clues to explain the possible causes of deactivation of one formulation and the high stability of the other. The latter catalyst was more active than most high-temperature formulations reported in the literature. The kinetic measurements were made at atmospheric pressure and reaction temperatures between 598 and 723 K. The results obtained were fitted by a Langmuir−Hinshelwood mechanism assuming that the rate-determining step was the surface reaction of adsorbed CO and H2O. The parity plot showed a good correlation between the experimental and calculated reaction rates. The thermal parameters calculated with this model were all physically consistent. They were compared to kinetic, thermodynamic, and calculated data reported in the literature. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102202u [article] Kinetic study of a novel active and stable catalyst for the water gas shift reaction [texte imprimé] / Carolina A. Cornaglia, Auteur ; John F. Munera, Auteur ; Eduardo A. Lombardo, Auteur . - 2011 . - pp. 4381–4389. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4381–4389 Mots-clés : Kinetic  Gas Résumé : Two types of catalysts were synthesized and used in the Water Gas Shift Reaction (WGSR): Rh/La2O3 and Rh/La2O3-SiO2. The fresh and used catalysts were characterized through X-ray diffraction (XRD), laser raman spectroscopy (LRS), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The stability tests performed at 673 K (50 h time-on-stream) showed that the Rh/La2O3 slowly deactivated while Rh/La2O3-SiO2 exhibited high stability at least for 50 h on stream. The instrumental techniques offered some clues to explain the possible causes of deactivation of one formulation and the high stability of the other. The latter catalyst was more active than most high-temperature formulations reported in the literature. The kinetic measurements were made at atmospheric pressure and reaction temperatures between 598 and 723 K. The results obtained were fitted by a Langmuir−Hinshelwood mechanism assuming that the rate-determining step was the surface reaction of adsorbed CO and H2O. The parity plot showed a good correlation between the experimental and calculated reaction rates. The thermal parameters calculated with this model were all physically consistent. They were compared to kinetic, thermodynamic, and calculated data reported in the literature. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102202u