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Supercritical reaction calorimetry / Charalampos A. Mantelis in Industrial & engineering chemistry research, Vol. 47 N°10 (Mai 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3372–3379 Titre : Supercritical reaction calorimetry : versatile tool for measuring heat transfer properties and monitoring chemical reactions in supercritical fluids Type de document : texte imprimé Auteurs : Charalampos A. Mantelis, Auteur ; Thierry Meyer, Auteur Année de publication : 2008 Article en page(s) : p. 3372–3379 Note générale : Bibliogr. p. 3378-3379 Langues : Anglais (eng) Mots-clés : Calorimetry  technique;  Supercritical  fluids;  Polymerization Résumé : The heat flow reaction calorimetry technique was developed for reactions with supercritical fluids and was applied to monitor the free-radical dispersion polymerization of methyl methacrylate in supercritical carbon dioxide (scCO2). The main mathematical equation for the calorimetric calculations was modified to take into account the particularities linked to the supercritical nature of the solvent. As a result, important heat transfer variables, such as the overall heat transfer coefficient, can be measured at the actual reaction conditions. This information is later used to calculate the heat released by the reaction and thus monitor its evolution. The robustness and accuracy of the technique allowed also investigating the effects of several reaction parameters. Finally, the obtained data were used to illustrate the importance of pressure as far as the safety of the reaction is concerned. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0712030 [article] Supercritical reaction calorimetry : versatile tool for measuring heat transfer properties and monitoring chemical reactions in supercritical fluids [texte imprimé] / Charalampos A. Mantelis, Auteur ; Thierry Meyer, Auteur . - 2008 . - p. 3372–3379. Bibliogr. p. 3378-3379 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°10 (Mai 2008) . - p. 3372–3379 Mots-clés : Calorimetry  technique;  Supercritical  fluids;  Polymerization Résumé : The heat flow reaction calorimetry technique was developed for reactions with supercritical fluids and was applied to monitor the free-radical dispersion polymerization of methyl methacrylate in supercritical carbon dioxide (scCO2). The main mathematical equation for the calorimetric calculations was modified to take into account the particularities linked to the supercritical nature of the solvent. As a result, important heat transfer variables, such as the overall heat transfer coefficient, can be measured at the actual reaction conditions. This information is later used to calculate the heat released by the reaction and thus monitor its evolution. The robustness and accuracy of the technique allowed also investigating the effects of several reaction parameters. Finally, the obtained data were used to illustrate the importance of pressure as far as the safety of the reaction is concerned. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0712030