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Role of nitrous acid decomposition in absorber and bleacher in nitric acid plant / N.D. Ingale in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009) 

Public ISBD [article]  in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 851-858 Titre : Role of nitrous acid decomposition in absorber and bleacher in nitric acid plant Type de document : texte imprimé Auteurs : N.D. Ingale, Auteur ; I. B. Chatterjee, Auteur ; J.B. Joshi, Auteur Année de publication : 2010 Article en page(s) : pp. 851-858 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : HNO2  decomposition  HNO2  oxidation  with  O2  NO  oxidation  with  HNO3  Multi-component  absorption  and  desorption  with  chemical  reaction  HNO3  and  HNO2  concentration  profile  in  absorber  HNO2  concentration  profile  in  bleacher  NOx  absorption Index. décimale : 660 Résumé : The stringent statutory regulation for clean environment makes the absorber and the bleacher in the nitric acid plant two very important equipments. The NOx finally released to the atmosphere from the absorber, is based on the mathematical calculations of the nitric acid and nitrous acid concentration profiles along the length of the absorber. The present work focuses on the role of HNO2 decomposition in the absorber and the bleacher in the nitric acid plant. The decomposition of HNO2 is a heterogeneous reaction resulting into the formation of nitric acid and desorption of nitric oxide. At high nitric acid concentration (40–50 wt.%), the reversibility of HNO2 decomposition due to NO oxidation with nitric acid is important. The model for bleacher column is presented, which takes into account the de-colorization of the product acid from the absorption column and makes it free from the nitrous acid. The model for the bleacher also takes into account the decomposition and oxidation of HNO2 with dissolved oxygen. The models proposed for absorber and bleacher are validated from the data collected from a mono-pressure nitric acid plant as well as the data present in open literature. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X7R86W-1&_user=6 [...] [article] Role of nitrous acid decomposition in absorber and bleacher in nitric acid plant [texte imprimé] / N.D. Ingale, Auteur ; I. B. Chatterjee, Auteur ; J.B. Joshi, Auteur . - 2010 . - pp. 851-858. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 851-858 Mots-clés : HNO2  decomposition  HNO2  oxidation  with  O2  NO  oxidation  with  HNO3  Multi-component  absorption  and  desorption  with  chemical  reaction  HNO3  and  HNO2  concentration  profile  in  absorber  HNO2  concentration  profile  in  bleacher  NOx  absorption Index. décimale : 660 Résumé : The stringent statutory regulation for clean environment makes the absorber and the bleacher in the nitric acid plant two very important equipments. The NOx finally released to the atmosphere from the absorber, is based on the mathematical calculations of the nitric acid and nitrous acid concentration profiles along the length of the absorber. The present work focuses on the role of HNO2 decomposition in the absorber and the bleacher in the nitric acid plant. The decomposition of HNO2 is a heterogeneous reaction resulting into the formation of nitric acid and desorption of nitric oxide. At high nitric acid concentration (40–50 wt.%), the reversibility of HNO2 decomposition due to NO oxidation with nitric acid is important. The model for bleacher column is presented, which takes into account the de-colorization of the product acid from the absorption column and makes it free from the nitrous acid. The model for the bleacher also takes into account the decomposition and oxidation of HNO2 with dissolved oxygen. The models proposed for absorber and bleacher are validated from the data collected from a mono-pressure nitric acid plant as well as the data present in open literature. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X7R86W-1&_user=6 [...]