Documents disponibles écrits par cet auteur

Influence of operating conditions on SO3 formation during air and oxy - fuel combustion / Daniel Fleig in Industrial & engineering chemistry research, Vol. 51 N° 28 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 28 (Juillet 2012) . - pp. 9475-9482 Titre : Influence of operating conditions on SO3 formation during air and oxy - fuel combustion Type de document : texte imprimé Auteurs : Daniel Fleig, Auteur ; Klas Andersson, Auteur ; Filip Johnsson, Auteur Année de publication : 2012 Article en page(s) : pp. 9475-9482 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Oxidant  Supercritical  state  Pollution  abatement Résumé : Abatement of aniline in supercritical water was explored in a tubular-flow reactor using oxygen as the oxidant. The effects of the reaction temperature, oxidant stoichiometric ratio, residence time, and initial aniline concentration on the product distribution were investigated. Aniline was primarily hydrolyzed to phenol and ammonia, and thereby, abatement of aniline was converted into the co-oxidation of phenol and ammonia in supercritical water. Phenol was the main carbon-containing intermediate, and ammonia was the exclusive nitrogen-containing intermediate on the pathway to the end products N2, N2O, and NO3-. Owing to the adsorption of aniline and catalysis on the reactor wall (made of Hastelloy C-276), the disappearance of ammonia during aniline supercritical water oxidation (SCWO) was markedly faster than that during SCWO of ammonia alone. Ammonia was mainly converted to N2 (heterogeneous mechanism), and low levels of N2O and NO3― were also produced (homogeneous mechanism). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26163283 [article] Influence of operating conditions on SO3 formation during air and oxy - fuel combustion [texte imprimé] / Daniel Fleig, Auteur ; Klas Andersson, Auteur ; Filip Johnsson, Auteur . - 2012 . - pp. 9475-9482. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 28 (Juillet 2012) . - pp. 9475-9482 Mots-clés : Oxidant  Supercritical  state  Pollution  abatement Résumé : Abatement of aniline in supercritical water was explored in a tubular-flow reactor using oxygen as the oxidant. The effects of the reaction temperature, oxidant stoichiometric ratio, residence time, and initial aniline concentration on the product distribution were investigated. Aniline was primarily hydrolyzed to phenol and ammonia, and thereby, abatement of aniline was converted into the co-oxidation of phenol and ammonia in supercritical water. Phenol was the main carbon-containing intermediate, and ammonia was the exclusive nitrogen-containing intermediate on the pathway to the end products N2, N2O, and NO3-. Owing to the adsorption of aniline and catalysis on the reactor wall (made of Hastelloy C-276), the disappearance of ammonia during aniline supercritical water oxidation (SCWO) was markedly faster than that during SCWO of ammonia alone. Ammonia was mainly converted to N2 (heterogeneous mechanism), and low levels of N2O and NO3― were also produced (homogeneous mechanism). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26163283

Reburning in oxy - fuel combustion / Fredrik Normann in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9088–9094 Titre : Reburning in oxy - fuel combustion : A parametric study of the combustion chemistry Type de document : texte imprimé Auteurs : Fredrik Normann, Auteur ; Klas Andersson, Auteur ; Filip Johnsson, Auteur Année de publication : 2010 Article en page(s) : pp. 9088–9094 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nitrogen  oxides  Oxy  fuel  combustion Résumé : The present work investigates reburning reduction of nitrogen oxides in oxy-fuel combustion by means of a detailed reaction mechanism applied to a plug-flow reactor. Reburning reactions, which are known to convert NOx into N2, are of special interest in oxy-fuel combustion because of extensive recirculation of flue gases, including NOx, to the flame. Furthermore, the high concentration of carbon dioxide in oxy-fuel combustion is known to influence the radical pool (H/O/OH), which is critical to the combustion chemistry. In the present work, it is shown how the changes in the radical pool alter the nitrogen chemistry both directly and indirectly by influencing the formation and oxidation of hydrocarbon radicals. It is shown that reburning is more sensitive to the combustion temperature but is less affected by the combustion stoichiometry under oxy-fuel compared to air conditions. The main reasons are the impact of increased CO2 concentration on hydrocarbon oxidation and the increased importance of CH3 as a reactant in oxy-fuel combustion. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101192a [article] Reburning in oxy - fuel combustion : A parametric study of the combustion chemistry [texte imprimé] / Fredrik Normann, Auteur ; Klas Andersson, Auteur ; Filip Johnsson, Auteur . - 2010 . - pp. 9088–9094. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9088–9094 Mots-clés : Nitrogen  oxides  Oxy  fuel  combustion Résumé : The present work investigates reburning reduction of nitrogen oxides in oxy-fuel combustion by means of a detailed reaction mechanism applied to a plug-flow reactor. Reburning reactions, which are known to convert NOx into N2, are of special interest in oxy-fuel combustion because of extensive recirculation of flue gases, including NOx, to the flame. Furthermore, the high concentration of carbon dioxide in oxy-fuel combustion is known to influence the radical pool (H/O/OH), which is critical to the combustion chemistry. In the present work, it is shown how the changes in the radical pool alter the nitrogen chemistry both directly and indirectly by influencing the formation and oxidation of hydrocarbon radicals. It is shown that reburning is more sensitive to the combustion temperature but is less affected by the combustion stoichiometry under oxy-fuel compared to air conditions. The main reasons are the impact of increased CO2 concentration on hydrocarbon oxidation and the increased importance of CH3 as a reactant in oxy-fuel combustion. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101192a