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New "enhanced NH3 - SCR" reaction for NOx emission control / Pio Forzzatti in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10386-10391 Titre : New "enhanced NH3 - SCR" reaction for NOx emission control Type de document : texte imprimé Auteurs : Pio Forzzatti, Auteur ; Isabella Nova, Auteur ; Enrico Tronconi, Auteur Année de publication : 2011 Article en page(s) : pp. 10386-10391 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pollution  abatement  Selective  catalytic  reduction Résumé : NH3-selective catalytic reduction (SCR) is applied worldwide to DeNOx of combustion exhausts of stationary and mobile sources, but a greater DeNOx activity at low temperatures is desired to meet forthcoming restrictive legislations and to increase energy efficiency in specific applications. We have obtained high NO reduction efficiencies at 200-300 °C over commercial V-based and Fe-exchanged zeolite catalysts by reacting NO with both ammonia and nitrates (e.g., ammonium nitrate) according to a novel "enhanced SCR" reaction, 2NH3 + 2NO + NH4NO3 → 3N2 + 5H2O. This provides a new route for low-temperature NOx reduction wherein the DeNOx activity is maximized by dosing an aqueous solution of nitrates to the SCR reactor feed stream. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447930 [article] New "enhanced NH3 - SCR" reaction for NOx emission control [texte imprimé] / Pio Forzzatti, Auteur ; Isabella Nova, Auteur ; Enrico Tronconi, Auteur . - 2011 . - pp. 10386-10391. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10386-10391 Mots-clés : Pollution  abatement  Selective  catalytic  reduction Résumé : NH3-selective catalytic reduction (SCR) is applied worldwide to DeNOx of combustion exhausts of stationary and mobile sources, but a greater DeNOx activity at low temperatures is desired to meet forthcoming restrictive legislations and to increase energy efficiency in specific applications. We have obtained high NO reduction efficiencies at 200-300 °C over commercial V-based and Fe-exchanged zeolite catalysts by reacting NO with both ammonia and nitrates (e.g., ammonium nitrate) according to a novel "enhanced SCR" reaction, 2NH3 + 2NO + NH4NO3 → 3N2 + 5H2O. This provides a new route for low-temperature NOx reduction wherein the DeNOx activity is maximized by dosing an aqueous solution of nitrates to the SCR reactor feed stream. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447930