Documents disponibles écrits par cet auteur

Effect of ethanol, dimethylether, and oxygen, when mixed with acetylene, on the formation of soot and gas products / Claudia Esarte in Industrial & engineering chemistry research, Vol. 49 N° 15 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6772–6779 Titre : Effect of ethanol, dimethylether, and oxygen, when mixed with acetylene, on the formation of soot and gas products Type de document : texte imprimé Auteurs : Claudia Esarte, Auteur ; Angela Millera, Auteur ; Rafael Bilbao, Auteur Année de publication : 2010 Article en page(s) : pp 6772–6779 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ethanol  Dimethylether  Oxygen. Résumé : The purpose of this research work is to analyze the effect of ethanol, dimethylether (DME), and oxygen on the formation of gas and soot products when mixed with acetylene and reacted under different conditions, the influence of the oxygenated compounds’ molecular structure, and the impact of the origin of the carbon and oxygen in the different reacting compounds. Experiments have been carried out in a quartz flow reactor in the temperature interval of 975−1475 K, and gas and soot products have been identified and quantified. Experimental data have been interpreted in terms of a literature detailed gas phase kinetic model. Results show that the presence of ethanol and DME in the reacting mixtures results in a diminution of the production of soot compared to the pyrolysis of pure acetylene; less soot is produced in the pyrolysis of acetylene−DME mixtures. The source of C and O is a key factor, being directly related to the soot-forming tendency of the molecules and the different bonds in the molecules. The concentrations of CO, CO2, and the rest of the gaseous compounds found in the outlet stream are related to the different reaction pathways which occur depending on either the presence of the oxygenated compounds or O2. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901663g [article] Effect of ethanol, dimethylether, and oxygen, when mixed with acetylene, on the formation of soot and gas products [texte imprimé] / Claudia Esarte, Auteur ; Angela Millera, Auteur ; Rafael Bilbao, Auteur . - 2010 . - pp 6772–6779. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6772–6779 Mots-clés : Ethanol  Dimethylether  Oxygen. Résumé : The purpose of this research work is to analyze the effect of ethanol, dimethylether (DME), and oxygen on the formation of gas and soot products when mixed with acetylene and reacted under different conditions, the influence of the oxygenated compounds’ molecular structure, and the impact of the origin of the carbon and oxygen in the different reacting compounds. Experiments have been carried out in a quartz flow reactor in the temperature interval of 975−1475 K, and gas and soot products have been identified and quantified. Experimental data have been interpreted in terms of a literature detailed gas phase kinetic model. Results show that the presence of ethanol and DME in the reacting mixtures results in a diminution of the production of soot compared to the pyrolysis of pure acetylene; less soot is produced in the pyrolysis of acetylene−DME mixtures. The source of C and O is a key factor, being directly related to the soot-forming tendency of the molecules and the different bonds in the molecules. The concentrations of CO, CO2, and the rest of the gaseous compounds found in the outlet stream are related to the different reaction pathways which occur depending on either the presence of the oxygenated compounds or O2. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901663g

Pyrolysis of ethanol / Claudia Esarte 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. 4412–4419 Titre : Pyrolysis of ethanol : gas and soot products formed Type de document : texte imprimé Auteurs : Claudia Esarte, Auteur ; Maria Peg, Auteur ; Maria P. Ruiz, Auteur Année de publication : 2011 Article en page(s) : pp. 4412–4419 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ethanol  Gas Résumé : Ethanol may be used in diesel−ethanol mixtures in order to decrease soot emissions. Therefore, it is important to evaluate the contribution of ethanol to soot formation. The influence of the temperature on the pyrolysis of ethanol under sooting conditions has been studied. Pyrolysis experiments were carried out in a quartz reactor in the 700−1200 °C temperature range, for an inlet C2H5OH concentration of 50 000 ppm and a gas residence time in seconds of 1706/(T/K) . The concentrations of the gases analyzed in the experiments are shown in this work together with simulations carried out with a literature kinetic model. Theoretical and experimental results present, generally, a good agreement in spite of the model not taking into account the soot formation. Under the studied conditions, soot formation has been observed above 1050 °C. With the soot samples obtained, a study of their reactivity toward O2 and NO has been carried out, and several characterization techniques, such as elemental analysis, Brunauer−Emmett−Teller (BET) surface area, transmission electron microscopy, and X-ray diffraction have been used to study the structural properties of the collected soot samples and relate them to their reactivity. It has been observed that the soot samples formed at higher temperatures exhibit a lower reactivity toward O2 and NO, and the characterization analyses support these results. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1022628 [article] Pyrolysis of ethanol : gas and soot products formed [texte imprimé] / Claudia Esarte, Auteur ; Maria Peg, Auteur ; Maria P. Ruiz, Auteur . - 2011 . - pp. 4412–4419. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4412–4419 Mots-clés : Ethanol  Gas Résumé : Ethanol may be used in diesel−ethanol mixtures in order to decrease soot emissions. Therefore, it is important to evaluate the contribution of ethanol to soot formation. The influence of the temperature on the pyrolysis of ethanol under sooting conditions has been studied. Pyrolysis experiments were carried out in a quartz reactor in the 700−1200 °C temperature range, for an inlet C2H5OH concentration of 50 000 ppm and a gas residence time in seconds of 1706/(T/K) . The concentrations of the gases analyzed in the experiments are shown in this work together with simulations carried out with a literature kinetic model. Theoretical and experimental results present, generally, a good agreement in spite of the model not taking into account the soot formation. Under the studied conditions, soot formation has been observed above 1050 °C. With the soot samples obtained, a study of their reactivity toward O2 and NO has been carried out, and several characterization techniques, such as elemental analysis, Brunauer−Emmett−Teller (BET) surface area, transmission electron microscopy, and X-ray diffraction have been used to study the structural properties of the collected soot samples and relate them to their reactivity. It has been observed that the soot samples formed at higher temperatures exhibit a lower reactivity toward O2 and NO, and the characterization analyses support these results. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1022628