Experimental and numerical investigation of electrostatic spray liquid-liquid extraction with ionic liquids

• Autorzy: Krawczyk M. , Kamiński K. , Petera J.
• Języki publikacji: PL

Abstrakty

EN

A new concept of an electrostatic spray column for liquid-liquid extraction was investigated. An important problem for separation processes is the presence of azeotropic or close-boiling mixtures in their production, for example heptane with ethanol, since the separation is impossible by ordinary distillation. The use of ionic liquids (IL) as a dispersed solvent specially engineered for any specific organic mixture in terms of selectivity is a key factor to successful separation. As IL present particularly attractive combination of favorable characteristics for the separation of heptane and ethanol, in this work we use 1-butyl-3-methylimidazolium methyl sulfate [BMIM][MeSO4]. Because of high viscosity and relatively high cost of IL a new technique was introduced, consisting in the electrostatically spray generation to enhance the mass transport between the phases. In order to optimally design the geometry of the contactor a series of numerical simulation was performed. Especially multi-nozzle variants for better exploitation of contactor volume were investigated. Experiments showed excellent possibility of control of the dispersion characteristics by applied voltage and thus control of the rate of extraction. The preliminary simulations based on our mathematical model for a three nozzle variant exhibited visual agreement with the theory of electrostatics.

Słowa kluczowe

PL

ciecze jonowe; ekstrakcja ciecz-ciecz; symulacja numeryczna

EN

electrostatic spray; ionic liquids; liquid-liquid extraction; numerical simulation

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2012
• Tom: Vol. 33, nr 1
• Strony: 167--183
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Krawczyk M.

autor

Kamiński K.

autor

Petera J.

• Technical University of Lodz, Faculty of Process and Environmental Engineering, ul. Wólczańska 213, 90-924 Łódź, Poland

Bibliografia

• 1. Ahosseini A., Petera J., Weatherley L.R., Scurto A.M., 2008. Interfacial mass transport properties in biphasic ionic liquid systems. ACS National Meeting, Philadelphia, USA, 17-21 August 2008.
• 2. Ahosseini A., Scurto A. M., 2008. Viscosity of imidazolium-based ionic liquids at elevated pressures: Cation and anion effects. Int. J. Thermophysics, 29, 1222-1243. DOI: 10.1007/s 10765-008-0497-7.
• 3. Bailey AG. 1988. Electrostatic Spraying of Liquids. Wiley, New York.
• 4. Domańska U., Marciniak A., 2008. Activity coefficients at infinite dilution measurements for organic solutes and water in the ionic liquid l-butyl-3-methylimidazolium trifluoromethanesulfonate. J. Phys. Chem. B, 112, 11100-11105. DOI: 10.1021/jp804107y.
• 5. Fernandez A., Garcia J., Torrecilla J.S., Oliet M., Rodriguez F., 2008. Volumetric, transport and surface properties of [bmim][MeS04] and [emim] [EtS04] ionic liquids as a function of temperature. J. Chem. Eng. Data, 53, 1518-1522. DOI: 10.1021/je8000766.
• 6. Foco G.M., Bottini S.B., Quezada N., de la Fuente J.C., Peters C.J., 2006. Activity coefficients at infinite dilution in l-alkyl-3-methylimidazolium tetrafluoroborate ionic liquids, J. Chem. Eng. Data, 51, 1088-1091, DOI: 10.1021/je050544m.
• 7. Holbrey J.D., Reichert W.M., Swatloski R.P., Broker G.A., Pitner W.R., Seddon K.R., Rogers R.D., 2002. Efficient, halide free synthesis of new, low cost ionic liquids: 1,3-dialkylimidazolium salts containing methyl-and ethyl-sulfate anions. Green Chem., 4, 407-113. DOI: 10.1039/b204469b.
• 8. Holbrey J.D., Seddon K. R., 1999. Ionic liquids, Clean Prod. Proc., 4, 223-236. DOI: 10.1007/sl00980050036.
• 9. Kaminski K., Bachtel A., Petera J., 2010. High voltage electro-spray extraction from organic mixture using room temperature ionic liquids, Inz. Aparat. Chem., 2, 61-62 (in Polish).
• 10. Pereiro A.B. , Rodriguez A., 2008. Azeotrope-breaking using [BMIM] [MeS04] ionic liquid in an extraction column. Sep.Purif. Technol., 62, 733-738. DOI: 10.1016/j.seppur.2008.03.015.
• 11. Petera J., Weatherley L.R., Hume A.P., Gawrysiak T., 2007. A finite element algorithm for particle/droplet trajectory tracking, tested in a liquid-liquid system in the presence of an external electric field. Comp. Chem. Eng.,3\, 1369-1388. DOI: 10.1016/j.compchemeng.2006.11.010.
• 12. Petera J., Weatherley L. R., Rooney D., Kaminski K., 2009. A finite element model of enzymatically catalyzed hydrolysis in an electrostatic spray reactor, Comp. Chem. Eng., 144-161, DOI: 10.1016/j .compchemeng.2008.07.006.
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