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Received October 14, 2003
Accepted November 29, 2003
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Pervaporation of Esters with Hydrophobic Membrane
Department of Chemical Engineering, Kangwon National University, Chunchon 200-701, Korea 1Department of Environmental Engineering, Kangwon National University, Chunchon 200-701, Korea
krlee@cc.kangwon.ac.kr
Korean Journal of Chemical Engineering, May 2004, 21(3), 693-698(6), 10.1007/BF02705507
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Abstract
Surface-modified alumina membrane (Al2O3) was used for ester flavor recovery by pervaporation. This study focused on the permeation characteristics of ester compounds (ethyl acetate, EA; ethyl propionate, EP; ethyl butyrate, EB) through tube-type hydrophobic membrane. Experiments were performed to evaluate the effects of the feed concentration (0.15-0.60 wt%) and temperature (30-50 ℃) on separation of EA, EP, and EB from aqueous solutions. It was found that the permeation flux increased with increasing feed ester concentration and operating temperature. The fluxes of EA, EP, and EB at 0.60 wt% feed concentration and 40 ℃ were 254, 343, and 377 g/m2 hr, which was much higher than those of polymer membranes. It was reported that the permeate flux of EA with PDMS was 1.1-58 g/m2Þhr at feed concentration of 90-4,800 ppm and 45 ℃. The separation factors for the 0.15-0.60 wt% feed solution of EA, EP, and EB at 40 ℃ were in the range of 66.9-78.9, 106.5-97.3, and 120.5-122.8, respectively. Due to the high separation factor, phase separation occurred in permeate stream because the ester concentration in permeate was much above the saturation limit.
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References
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Baudot A, Marin M, Trans. IChemE, 75, 117 (1997)
Baudot A, Marin M, Ind. Eng. Chem. Res., 38(11), 4458 (1999)
Baudot A, Souchon I, Marin M, J. Membr. Sci., 158(1-2), 167 (1999)
Beaumelle D, Marin M, Chem. Eng. Process., 33(6), 449 (1994)
Charalambous G, Inglett GE, "Flavor of Foods and Beverages, Chemistry and Technology," New York (1978)
Choi SG, Cho MS, Kim JH, Kim SJ, Han NW, HWAHAK KONGHAK, 37(2), 243 (1999)
Djebbar MK, Nguyen QT, Clement R, Germain Y, J. Membr. Sci., 146(1), 125 (1998)
Feng XS, Huang RY, J. Membr. Sci., 118(1), 127 (1996)
Song KM, Hong YK, Yu J, Hong WH, Korean J. Chem. Eng., 19(2), 290 (2002)
Heath HB, Pharm B, "Flavor Technology," AVI, London (1978)
Ho CT, Tan CT, Tong CH, "Flavor Technology, Physical Chemistry, Modification, and Process," American Chemical Society (1995)
Howell JA, Sanchez V, Field RW, "Membrane in Bioprocessing Theory and Application," Chapman & Hall (1993)
Joao I, Crespo G, Boddeker KW, "Pervaporation, Removal of Organics from Water and Organic/Organic Separations, Membrane Processes in Separation and Purification," Netherlands (1993)
Won JM, Bae SY, Ha BH, Kim HT, Dumazawa H, Korean J. Chem. Eng., 13(3), 324 (1996)
Mulder M, "Basic Principles of Membrane Technology," Kluwer, 2nd Ed., Netherlands (1991)
Olsson J, Tragardh G, J. Membr. Sci., 187(1-2), 23 (2001)
Rajagopalan N, Cheryan M, J. Membr. Sci., 104(3), 243 (1995)
Ren JZ, Jiang CZ, J. Membr. Sci., 140(2), 221 (1998)
Sampranpiboon P, Jiraratananon R, Uttapap D, Feng X, Huang RYM, J. Membr. Sci., 173(1), 53 (2000)
Yeom CK, Dickson JM, Brook MA, Korean J. Chem. Eng., 13(5), 482 (1996)
