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Article high silica zeolites as an alternative to weak base adsorbents in succinic acid recovery / Efe, Cagri in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1837–1843 Titre : Article high silica zeolites as an alternative to weak base adsorbents in succinic acid recovery Type de document : texte imprimé Auteurs : Efe, Cagri, Auteur ; Van der Wielen, Luuk A. M., Auteur ; Straathof, Adrie J. J., Auteur Année de publication : 2010 Article en page(s) : pp 1837–1843 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : High  silica  zeolites  Succinic  acid. Résumé : Initial studies were performed on succinic acid adsorption from aqueous solutions by zeolite powders. CVB-28014 (high-silica ZSM-5) showed higher equilibrium loadings (up to 0.16 g/g) than CBV-901 and CP811C-300, and was used for follow up studies. In the presence of Na+ counterions, the succinic acid adsorption decreased in parallel with the succinic acid dissociation, but the adsorbent also showed some affinity toward sodium hydrogensuccinate with selectivities in the range 10−20 toward succinic acid. The presence of acetic acid resulted in lower succinic acid loadings but the capacities remained sufficient for efficient recovery. The selectivity between succinic acid and acetic acid ranged from 1 to 6. Increasing the temperature to 70 °C reduced the equilibrium loadings, but in ethanol the succinic acid loadings showed a more significant drop. Therefore, regeneration might be achieved by using an adsorption-competitive solvent like ethanol. The current results suggest that this may lead to an attractive option for the recovery of succinic acid from fermentation media. Hydrophobic rather than ionic interactions are used, thus avoiding regeneration involving acid and base and the associated waste salt production. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901110b [article] Article high silica zeolites as an alternative to weak base adsorbents in succinic acid recovery [texte imprimé] / Efe, Cagri, Auteur ; Van der Wielen, Luuk A. M., Auteur ; Straathof, Adrie J. J., Auteur . - 2010 . - pp 1837–1843. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1837–1843 Mots-clés : High  silica  zeolites  Succinic  acid. Résumé : Initial studies were performed on succinic acid adsorption from aqueous solutions by zeolite powders. CVB-28014 (high-silica ZSM-5) showed higher equilibrium loadings (up to 0.16 g/g) than CBV-901 and CP811C-300, and was used for follow up studies. In the presence of Na+ counterions, the succinic acid adsorption decreased in parallel with the succinic acid dissociation, but the adsorbent also showed some affinity toward sodium hydrogensuccinate with selectivities in the range 10−20 toward succinic acid. The presence of acetic acid resulted in lower succinic acid loadings but the capacities remained sufficient for efficient recovery. The selectivity between succinic acid and acetic acid ranged from 1 to 6. Increasing the temperature to 70 °C reduced the equilibrium loadings, but in ethanol the succinic acid loadings showed a more significant drop. Therefore, regeneration might be achieved by using an adsorption-competitive solvent like ethanol. The current results suggest that this may lead to an attractive option for the recovery of succinic acid from fermentation media. Hydrophobic rather than ionic interactions are used, thus avoiding regeneration involving acid and base and the associated waste salt production. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901110b

Assessment of options for selective 1-butanol recovery from aqueous solution / Arjan Oudshoorn in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7325–7336 Titre : Assessment of options for selective 1-butanol recovery from aqueous solution Type de document : texte imprimé Auteurs : Arjan Oudshoorn, Auteur ; Van der Wielen, Luuk A. M., Auteur ; Straathof, Adrie J. J., Auteur Année de publication : 2009 Article en page(s) : pp. 7325–7336 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : 1-butanol  Butanol  recovery  methodsAqueous  fermentation  Efficient  recovery Résumé : The microbial production of 1-butanol occurs in aqueous fermentation broth, with up to ∼20 g/L of product. Efficient recovery of butanol from this dilute aqueous phase determines, to a large extent, the efficiency of the production process. Starting from the thermodynamic (phase) properties of butanol and water systems, this paper presents a structured approach to determine the key characteristics of various butanol recovery methods. Analysis of reported separations, combined with fundamental phase properties, has resulted in both the characterization of the selectivity of recovery and estimations of the energy requirement during product recovery for a variety of recovery methods. Energy-efficient systems for the recovery of butanol from aqueous solution are pervaporation- and adsorption-based techniques. The applied method predicts the recovery energy requirement for both techniques to be <4 MJ/kg of butanol, which, on an energy basis, is similar to ∼10% of the internal combustion energy of butanol. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900537w [article] Assessment of options for selective 1-butanol recovery from aqueous solution [texte imprimé] / Arjan Oudshoorn, Auteur ; Van der Wielen, Luuk A. M., Auteur ; Straathof, Adrie J. J., Auteur . - 2009 . - pp. 7325–7336. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7325–7336 Mots-clés : 1-butanol  Butanol  recovery  methodsAqueous  fermentation  Efficient  recovery Résumé : The microbial production of 1-butanol occurs in aqueous fermentation broth, with up to ∼20 g/L of product. Efficient recovery of butanol from this dilute aqueous phase determines, to a large extent, the efficiency of the production process. Starting from the thermodynamic (phase) properties of butanol and water systems, this paper presents a structured approach to determine the key characteristics of various butanol recovery methods. Analysis of reported separations, combined with fundamental phase properties, has resulted in both the characterization of the selectivity of recovery and estimations of the energy requirement during product recovery for a variety of recovery methods. Energy-efficient systems for the recovery of butanol from aqueous solution are pervaporation- and adsorption-based techniques. The applied method predicts the recovery energy requirement for both techniques to be <4 MJ/kg of butanol, which, on an energy basis, is similar to ∼10% of the internal combustion energy of butanol. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900537w