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Received December 9, 2008
Accepted March 10, 2009
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Production of dehydrated fuel ethanol by pressure swing adsorption process in the pilot plant
Changhae Institute of Cassava & Ethanol Research, Changhae Ethanol CO., Ltd., 829,3-Ga Palbok-dong, Dukjin-gu Jeonju 561-203, Korea 1School of Chemical Engineering, Chonbuk National University, 664-14,Dukjin-dong, Dukjin-gu, Jeonju 561-756, Korea
bwchung@chonbuk.ac.kr
Korean Journal of Chemical Engineering, September 2009, 26(5), 1308-1312(5), 10.1007/s11814-009-0226-3
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Abstract
Fermented ethanol is gaining wide popularity as a car fuel additive. The pressure swing adsorption (PSA) process is attractive for the dehydration of bioethanol on the industrial scale, since its energy consumption is low and it is capable of producing a very pure product. 3 Å zeolite possesses micro-pores which, due to their small size, adsorb water molecules but not ethanol molecules. In this work, up to 2 kL/day of dehydrated ethanol (99.5% by weight) was_x000D_
successfully produced with 3 Å zeolite by the pressure swing adsorption process. The cycles of the PSA process were operated under the following variables: feed flow rate (27-62 Nm3/hr of 93.2% by weight), purge/feed ratio (30-24%), adsorption temperature (130-140 ℃) and adsorption pressure (1.2 atm).
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Leland MV, Biofuels, Bioprod. Bioref., 2, 553 (2008)
Yang J, Park MW, Chang JW, Ko SM, Lee CH, Korean J. Chem. Eng., 15(2), 211 (1998)
Na BK, Koo KK, Eum HM, Lee H, Song HK, Korean J. Chem. Eng., 18(2), 220 (2001)
Ladisch MR, Dyck K, Science, 205, 898 (1979)
Fleming HL, Sep. Sci. Technol., 25, 1239 (1990)
Bui S, Verykios X, Mutharasan R, Ind. Eng. Chem. Process Des. Dev., 24, 1209 (1985)
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Cote P, Roy C, Bernier N, Schwzrtz M, Dodkin T, Bradt C, Presentation at International Fuel Ethanol Workshop (2007)
