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Received November 29, 2002
Accepted February 14, 2003
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Industrial Application of an Extended Fully Thermally Coupled Distillation Column to BTX Separation in a Naphtha Reforming Plant
Department of Chemical Engineering, Dong-A University, Busan 604-714, Korea 1Department of Chemical Engineering, Dongeui University, Busan 614-714, Korea 2Department of Chemical Engineering, Pusan National University, Busan 609-735, Korea
Korean Journal of Chemical Engineering, July 2003, 20(4), 755-761(7), 10.1007/BF02706919
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Abstract
Aromatic compounds are yielded from naphtha reforming in a petrochemical plant, and the products are separated with binary distillation columns for benzene, toluene, xylene and heavy components in sequence. In this study, the first three columns of the fractionation process in the naphtha reforming unit are replaced with an extended fully thermally coupled distillation column (EFTCDC) also known as the extended Petlyuk column. An industrial-sized application of the EFTCDC is examined to compare the performance of the column with a conventional system. From a structural design giving the optimum structure of the column, a practical column structure is derived and used in the HYSYS simulation to find the optimal operation condition for a given set of product specifications. The EFTCDC gives an energy saving of 9.7% over a conventional three-column process. In addition, it is proved that the design procedure is good for an industrial process of 18 components.
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References
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Christiansen AC, Skogestad S, Lien K, Comput. Chem. Eng., 21(S), 237 (1997)
Chung HD, Yi JS, Yeo YK, Chang KS, Gil YC, Choi HY, Korean J. Chem. Eng., 14(5), 325 (1997)
Douglas JM, "Conceptual Design of Chemical Processes," McGraw-Hill Book Co., New York, 568 (1988)
Kaibel G, Chem. Eng. Technol., 10, 92 (1987)
Kim YH, Korean J. Chem. Eng., 17(5), 570 (2000)
Kim YH, J. Chem. Eng. Jpn., 34(2), 236 (2001)
Kim YH, Ind. Eng. Chem. Res., 40(11), 2460 (2001)
Kim YH, Chem. Eng. J., 85(2-3), 289 (2002)
Kim YH, Nakaiwa M, Hwang KS, Korean J. Chem. Eng., 19(3), 383 (2002)
Kim YH, Chem. Eng. J., 89(1-3), 89 (2002)
King CJ, "Separation Processes," McGraw-Hill Book Co., New York, 2nd edn. (1980)
KPIA, "Report," Korea Petrochemical Industry Association, Seoul, Korea (2002)
Lee JC, Yeo YK, Song KH, Kim IW, Korean J. Chem. Eng., 18(4), 428 (2001)
Midori S, Nakahashi A, "Industrial Application of Continuous Distillation Columns with Vertical Partition," Proc. 5th Intern. Symp. Separation Tech. Between Korea and Japan, 5, 221 (1999)
Sargent RWH, Gaminibandara K, "Optimum Design of Plate Distillation Column," Optimization in Action, Dixon, L.W.C., ed., Academic Press, London, 267 (1976)
Seader JD, Henley EJ, "Separation Process Principles," John Wiley & Sons, New York, 509 (1998)
Triantafyllou C, Smith R, Trans. IChemE, 70(A), 118 (1992)
