Continuous supercritical CO2 process using nanofiltration by inorganic membrane / Moonsung Koh in Industrial & engineering chemistry research, Vol. 48 N° 11 (Juin 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 11 (Juin 2009) . - pp. 5406–5414 Titre : Continuous supercritical CO2 process using nanofiltration by inorganic membrane Type de document : texte imprimé Auteurs : Moonsung Koh, Auteur ; Bruno Fournel, Auteur ; Stephane Sarrade, Auteur Année de publication : 2009 Article en page(s) : pp. 5406–5414 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Inorganic membranes Nanofiltration Supercritical CO2 Résumé : Nanofiltration using inorganic membranes was conducted to develop a continuous process in supercritical CO2. Inorganic membranes of various sizes (1, 5, 50, 300 kDa), materials (Al2O3/TiO2/ZrO2, Al2O3/ZrO2/TiO2), and modules (one and three channels) were used for the experiments. The effects of fluid viscosity and density, membrane active layer thickness, number of channels, pore size, and the flux of a fluid were analyzed when supercritical CO2 (sc-CO2) passed through the membrane. In the case of PE6100 surfactant, it was confirmed that sc-CO2 passed through the membrane at a flow rate and transmembrane pressure (ΔP) greater than 10 mL/min and 0.04 MPa, respectively, although the size of the surfactant was larger than that of the membrane pore. The phenomena were proven to have been caused by the folding effect. In the case of microemulsions using NP-4 and H2O, it was confirmed that water adsorbed on the membrane surface passed through at ΔP greater than 0.7 MPa. Based on these findings, experiments were conducted to separate microemulsions and dispersions. The experimental results indicated that microemulsions achieved 47% separation efficiency and 90% surfactant recovery efficiency due to the displacement of metal ions through the water adsorbed on the membrane surface. Conversely, dispersions yielded high separation efficiency. Also, the correlation between the contaminant size and the membrane pore size was confirmed through SEM images. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800452g [article] Continuous supercritical CO2 process using nanofiltration by inorganic membrane [texte imprimé] / Moonsung Koh, Auteur ; Bruno Fournel, Auteur ; Stephane Sarrade, Auteur . - 2009 . - pp. 5406–5414. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 11 (Juin 2009) . - pp. 5406–5414 Mots-clés : Inorganic membranes Nanofiltration Supercritical CO2 Résumé : Nanofiltration using inorganic membranes was conducted to develop a continuous process in supercritical CO2. Inorganic membranes of various sizes (1, 5, 50, 300 kDa), materials (Al2O3/TiO2/ZrO2, Al2O3/ZrO2/TiO2), and modules (one and three channels) were used for the experiments. The effects of fluid viscosity and density, membrane active layer thickness, number of channels, pore size, and the flux of a fluid were analyzed when supercritical CO2 (sc-CO2) passed through the membrane. In the case of PE6100 surfactant, it was confirmed that sc-CO2 passed through the membrane at a flow rate and transmembrane pressure (ΔP) greater than 10 mL/min and 0.04 MPa, respectively, although the size of the surfactant was larger than that of the membrane pore. The phenomena were proven to have been caused by the folding effect. In the case of microemulsions using NP-4 and H2O, it was confirmed that water adsorbed on the membrane surface passed through at ΔP greater than 0.7 MPa. Based on these findings, experiments were conducted to separate microemulsions and dispersions. The experimental results indicated that microemulsions achieved 47% separation efficiency and 90% surfactant recovery efficiency due to the displacement of metal ions through the water adsorbed on the membrane surface. Conversely, dispersions yielded high separation efficiency. Also, the correlation between the contaminant size and the membrane pore size was confirmed through SEM images. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800452g

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