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NaY zeolites catalyze dehydration of lactic acid to acrylic acid / Peng Sun 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. 9082–9087 Titre : NaY zeolites catalyze dehydration of lactic acid to acrylic acid : Studies on the effects of anions in potassium salts Type de document : texte imprimé Auteurs : Peng Sun, Auteur ; Dinghua Yu, Auteur ; Zhenchen Tang, Auteur Année de publication : 2010 Article en page(s) : pp. 9082–9087 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Zeolite  Catalyst  Dehydration  acid  Potassium  salts Résumé : NaY zeolite catalysts with and without potassium salt modifications were studied with respect to dehydration of lactic acid to acrylic acid. The selectivity for acrylic acid could be dramatically enhanced by modification of the NaY catalysts with potassium salts. The KI-modified NaY catalyst exhibited the best catalytic performance for lactic acid dehydration, over which 97.6% conversion and 67.9% acrylic acid selectivity could be gained at 598 K. Characterizations with TGA, XRD, N2 adsorption, 27Al MAS NMR, XPS, NH3-TPD, CO2-TPD, and mechanism analysis revealed that the counteranions in potassium salts exerted a significant influence on the catalytic behaviors via an electronic effect. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101093x [article] NaY zeolites catalyze dehydration of lactic acid to acrylic acid : Studies on the effects of anions in potassium salts [texte imprimé] / Peng Sun, Auteur ; Dinghua Yu, Auteur ; Zhenchen Tang, Auteur . - 2010 . - pp. 9082–9087. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9082–9087 Mots-clés : Zeolite  Catalyst  Dehydration  acid  Potassium  salts Résumé : NaY zeolite catalysts with and without potassium salt modifications were studied with respect to dehydration of lactic acid to acrylic acid. The selectivity for acrylic acid could be dramatically enhanced by modification of the NaY catalysts with potassium salts. The KI-modified NaY catalyst exhibited the best catalytic performance for lactic acid dehydration, over which 97.6% conversion and 67.9% acrylic acid selectivity could be gained at 598 K. Characterizations with TGA, XRD, N2 adsorption, 27Al MAS NMR, XPS, NH3-TPD, CO2-TPD, and mechanism analysis revealed that the counteranions in potassium salts exerted a significant influence on the catalytic behaviors via an electronic effect. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101093x