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Thermal decomposition kinetics of propylcyclohexane / Jason A Widegren in Industrial & engineering chemistry research, Vol. 48 N°2 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) . - p. 654–659 Titre : Thermal decomposition kinetics of propylcyclohexane Type de document : texte imprimé Auteurs : Jason A Widegren, Auteur ; Thomas J. Bruno, Auteur Année de publication : 2009 Article en page(s) : p. 654–659 Note générale : chemical ingenireeng Langues : Anglais (eng) Mots-clés : propylcyclohexane Résumé : As part of a large-scale thermophysical property measurement project, the decomposition kinetics of propylcyclohexane was investigated. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless steel ampule reactors. At each temperature, the extent of decomposition was determined as a function of time by gas chromatography. These data were used to derive first-order rate constants for the decomposition of propylcyclohexane. Decomposition rate constants ranged from 3.66 × 10−7 s−1 at 375 °C to 8.63 × 10−5 s−1 at 450 °C. Among other things, these rate constants are useful for planning property measurements at high temperatures. Based on the amount of time required for 1% of the sample to decompose (t0.01), we found that allowable instrument residence times ranged from about 8 h at 375 °C to about 2 min at 450 °C. The kinetic data were also used to determine Arrhenius parameters of A = 2.56 × 1016 s−1 and Ea = 283 kJ·mol−1. In addition to the decomposition kinetics, we have also done a GC−MS analysis in order to identify the most abundant decomposition products. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8008988 [article] Thermal decomposition kinetics of propylcyclohexane [texte imprimé] / Jason A Widegren, Auteur ; Thomas J. Bruno, Auteur . - 2009 . - p. 654–659. chemical ingenireeng Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) . - p. 654–659 Mots-clés : propylcyclohexane Résumé : As part of a large-scale thermophysical property measurement project, the decomposition kinetics of propylcyclohexane was investigated. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless steel ampule reactors. At each temperature, the extent of decomposition was determined as a function of time by gas chromatography. These data were used to derive first-order rate constants for the decomposition of propylcyclohexane. Decomposition rate constants ranged from 3.66 × 10−7 s−1 at 375 °C to 8.63 × 10−5 s−1 at 450 °C. Among other things, these rate constants are useful for planning property measurements at high temperatures. Based on the amount of time required for 1% of the sample to decompose (t0.01), we found that allowable instrument residence times ranged from about 8 h at 375 °C to about 2 min at 450 °C. The kinetic data were also used to determine Arrhenius parameters of A = 2.56 × 1016 s−1 and Ea = 283 kJ·mol−1. In addition to the decomposition kinetics, we have also done a GC−MS analysis in order to identify the most abundant decomposition products. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8008988

Thermal decomposition kinetics of the aviation turbine fuel jet A / Jason A Widegren in Industrial & engineering chemistry research, Vol. 47 N° 13 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 13 (Juillet 2008) . - p. 4342–4348 Titre : Thermal decomposition kinetics of the aviation turbine fuel jet A Type de document : texte imprimé Auteurs : Jason A Widegren, Auteur ; Thomas J. Bruno, Auteur Année de publication : 2008 Article en page(s) : p. 4342–4348 Note générale : Bibliogr. p.4347-4348 Langues : Anglais (eng) Mots-clés : Aviation  turbine  fuel  jet  A;  Decomposition;  Kinetic  data Résumé : As part of a large-scale thermophysical property measurement project, the global decomposition kinetics of the aviation turbine fuel Jet A was investigated. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless steel ampule reactors. At each temperature, the extent of decomposition was determined as a function of time by gas chromatography. These data were used to derive global pseudo-first-order rate constants that approximate the overall decomposition rate of the mixture. Decomposition rate constants ranged from 5.9 × 10−6 s−1 at 375 °C to 4.4 × 10−4 s−1 at 450 °C. These rate constants are useful for planning property measurements at high temperatures. On the basis of the amount of time required for 1% of the sample to decompose (t0.01), we found that allowable instrument residence times ranged from about 0.5 h at 375 °C to less than 1 min at 450 °C. The kinetic data were also used to derive Arrhenius parameters of A = 4.1 × 1012 s−1 and Ea = 220 kJ·mol−1. In addition to the decomposition kinetics, we have also done a GC-MS analysis of the vapor phase that is produced during the thermal decomposition measurements. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8000666 [article] Thermal decomposition kinetics of the aviation turbine fuel jet A [texte imprimé] / Jason A Widegren, Auteur ; Thomas J. Bruno, Auteur . - 2008 . - p. 4342–4348. Bibliogr. p.4347-4348 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 13 (Juillet 2008) . - p. 4342–4348 Mots-clés : Aviation  turbine  fuel  jet  A;  Decomposition;  Kinetic  data Résumé : As part of a large-scale thermophysical property measurement project, the global decomposition kinetics of the aviation turbine fuel Jet A was investigated. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless steel ampule reactors. At each temperature, the extent of decomposition was determined as a function of time by gas chromatography. These data were used to derive global pseudo-first-order rate constants that approximate the overall decomposition rate of the mixture. Decomposition rate constants ranged from 5.9 × 10−6 s−1 at 375 °C to 4.4 × 10−4 s−1 at 450 °C. These rate constants are useful for planning property measurements at high temperatures. On the basis of the amount of time required for 1% of the sample to decompose (t0.01), we found that allowable instrument residence times ranged from about 0.5 h at 375 °C to less than 1 min at 450 °C. The kinetic data were also used to derive Arrhenius parameters of A = 4.1 × 1012 s−1 and Ea = 220 kJ·mol−1. In addition to the decomposition kinetics, we have also done a GC-MS analysis of the vapor phase that is produced during the thermal decomposition measurements. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8000666