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Reducing byproduct formation during conversion of glycerol to propylene glycol / Chuang-Wei Chiu in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6878–6884 Titre : Reducing byproduct formation during conversion of glycerol to propylene glycol Type de document : texte imprimé Auteurs : Chuang-Wei Chiu, Auteur ; Ali Tekeei, Auteur ; Joshua M. Ronco, Auteur Année de publication : 2008 Article en page(s) : p. 6878–6884 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Glycerol  Propylene  glycol  Selective  conversion Résumé : During the conversion of glycerol to propylene glycol, highly selective conversion is necessary for commercial viability. The greatest strides in achieving high selectivity are attained with catalyst and temperature. For the conversion of glycerol to propylene glycol, these parameters can be optimized to achieve selectivities of greater than 80%. This paper is on the optimization of more-subtle parameters such as concentration, water content, pressure, isothermal operation, and residence time to achieve selectivities in excess of 90%. Data reveal that low concentrations are important to reduce by-product whose formation relies on second-order reaction mechanisms. Water is important to reduce dehydration reactions and indirectly helps to maintain more-isothermal operation. An optimal hydrogen partial pressure between 5 and 15 bar minimizes the cumulative amount of by-product that results from hydrocracking versus dehydration side-reactions. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800300a [article] Reducing byproduct formation during conversion of glycerol to propylene glycol [texte imprimé] / Chuang-Wei Chiu, Auteur ; Ali Tekeei, Auteur ; Joshua M. Ronco, Auteur . - 2008 . - p. 6878–6884. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6878–6884 Mots-clés : Glycerol  Propylene  glycol  Selective  conversion Résumé : During the conversion of glycerol to propylene glycol, highly selective conversion is necessary for commercial viability. The greatest strides in achieving high selectivity are attained with catalyst and temperature. For the conversion of glycerol to propylene glycol, these parameters can be optimized to achieve selectivities of greater than 80%. This paper is on the optimization of more-subtle parameters such as concentration, water content, pressure, isothermal operation, and residence time to achieve selectivities in excess of 90%. Data reveal that low concentrations are important to reduce by-product whose formation relies on second-order reaction mechanisms. Water is important to reduce dehydration reactions and indirectly helps to maintain more-isothermal operation. An optimal hydrogen partial pressure between 5 and 15 bar minimizes the cumulative amount of by-product that results from hydrocracking versus dehydration side-reactions. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800300a