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Received May 12, 2015
Accepted May 12, 2015
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Optimization study of pressure-swing distillation for the separation process of a maximum-boiling azeotropic system of water-ethylenediamine
Department of Chemical Engineering, Kongju National University, 275 Budae-dong, Cheonan-si, Seobuk-gu, Chungcheongnam-do 331-717, Korea 1Department of Mechanical Engineering, Kongju National University, 275 Budae-dong, Cheonan-si, Seobuk-gu, Chungcheongnam-do 331-717, Korea
jhcho@kongju.ac.kr
Korean Journal of Chemical Engineering, January 2016, 33(1), 46-56(11), 10.1007/s11814-015-0100-4
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Abstract
The separation of ethylenediamine (EDA) from aqueous solution is a challenging problem because its mixture forms an azeotrope. Pressure-swing distillation (PSD) as a method of separating azeotropic mixture were investingated. For a maximum-boiling azeotropic system, pressure change does not greatly affect the azeotropic composition of the system. However, the feasibility of using PSD was still analyzed through process simulation. Experimental vaporliquid equilibrium data of water-EDA system was studied to predict the suitability of thermodynamic model to be applied. This study performed an optimization of design parameters for each distillation column. Different combinations of operating pressures for the low- and high-pressure columns were used for each PSD simulation case. After the most efficient operating pressures were identified, two column configurations, low-high (LP+HP) and high-low (HP+LP) pressure column configuration, were further compared. Heat integration was applied to PSD system to reduce low and high temperature utility consumption.
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References
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Shen WF, Benyounes H, Gerbaud V, Ind. Eng. Chem. Res., 52(12), 4606 (2013)
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Doherty MF, Fidkowski ZT, Malone MF, Taylor R, Perry’s Chemical Engineers’ Handbook, 8th Ed., 13-82 (1992).
Luyben WL, Ind. Eng. Chem. Res., 47(16), 6140 (2008)
Luyben WL, Ind. Eng. Chem. Res., 51(33), 10881 (2012)
Modla G, Lang P, Chem. Eng. Sci., 63(11), 2856 (2008)
Modla G, Comput. Chem. Eng., 34(10), 1640 (2010)
Modla G, Lang P, Dynamics and Control of Process Systems, 2, 361 (2007)
Kopasz A, Modla G, Lang P, Gepeszet: Conference on Mechanical Engineering, ISBN 978-963-420-947-8 (2008).
Kopasz A, Modla G, Lang P, Conference on Distillation Absorption, Product composition control of a pressure swing double column batch rectifier, 557 (2010).
Fontalvo J, Vorstman MAAg, Wijers JG, Keurentjes JTF, Design and performance of two-phase flow pervaporation and hybrid distillation processes: A Dissertation, 7, 111 (2005).
Finepac Structures Pvt. Ltd.ⓒ Ethylene diamine (EDA)-Water Separation System, http://www.finepacindia.in/applications.html/.
Lee J, Cho J, Kim DM, Park S, Korean J. Chem. Eng., 28(2), 591 (2011)
Sun Q, Pan C, Yan X, Korean J. Chem. Eng., 30(3), 518 (2013)
Shirsat SP, Dawande SD, Kakade SS, Korean J. Chem. Eng., 30(12), 2163 (2013)
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“PRO/II Reference Help”, Invensys System Inc., SimSci-Esscor, 1994-2013. Revision: 25 Mar. 2013.
