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Chemically enhanced separation of H2S04/HI mixtures from the bunsen reaction in the sulfur−iodine thermochemical cycle / Vincenzo Barbarossa in Industrial & engineering chemistry research, Vol. 48 N° 19 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 19 (Octobre 2009) . - pp. 9040–9044 Titre : Chemically enhanced separation of H2S04/HI mixtures from the bunsen reaction in the sulfur−iodine thermochemical cycle Type de document : texte imprimé Auteurs : Vincenzo Barbarossa, Auteur ; Giuseppina Vanga, Auteur ; Maurizio Diamanti, Auteur Année de publication : 2009 Article en page(s) : pp. 9040–9044 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Sulfuric  acid  Hydriodic  acid  Sulfur  dioxide Résumé : The Bunsen reaction identifies the chemical formation of sulfuric acid and hydriodic acid when sulfur dioxide is oxidized by molecular iodine in aqueous solutions. This reaction occurs spontaneously in a temperature range of 293−373 K and is one of the three steps of the sulfur−iodine thermochemical cycle capable of producing hydrogen from water. In order to attain this, the handling of the H2SO4/HI mixture is crucial for the thermal decompositions which follow. In our study, we propose an innovative way to separate the acids by using an intermediate insoluble sulfonic acid which forms during the process. This procedure results in two main advantages: (1) the common problem of large quantities of iodine in excess is avoided and (2) less water is used. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002427 [article] Chemically enhanced separation of H2S04/HI mixtures from the bunsen reaction in the sulfur−iodine thermochemical cycle [texte imprimé] / Vincenzo Barbarossa, Auteur ; Giuseppina Vanga, Auteur ; Maurizio Diamanti, Auteur . - 2009 . - pp. 9040–9044. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 19 (Octobre 2009) . - pp. 9040–9044 Mots-clés : Sulfuric  acid  Hydriodic  acid  Sulfur  dioxide Résumé : The Bunsen reaction identifies the chemical formation of sulfuric acid and hydriodic acid when sulfur dioxide is oxidized by molecular iodine in aqueous solutions. This reaction occurs spontaneously in a temperature range of 293−373 K and is one of the three steps of the sulfur−iodine thermochemical cycle capable of producing hydrogen from water. In order to attain this, the handling of the H2SO4/HI mixture is crucial for the thermal decompositions which follow. In our study, we propose an innovative way to separate the acids by using an intermediate insoluble sulfonic acid which forms during the process. This procedure results in two main advantages: (1) the common problem of large quantities of iodine in excess is avoided and (2) less water is used. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002427