Industrial application of an extended fully thermally coupled distillation column to BTX separation in a naphtha reforming plant |
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Authors: | Email author" target="_blank">Young?Han?KimEmail author Dae?Woong?Choi Kyu-Suk?Hwang |
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Affiliation: | (1) Department of Chemical Engineering, Dong-A University, 604-714 Busan, Korea;(2) Department of Chemical Engineering, Dongeui University, 614-714 Busan, Korea;(3) Department of Chemical Engineering, Pusan National University, 609-735 Busan, Korea |
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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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Keywords: | Process Design Thermally Coupled Distillation Fractionation Process Multi-Component Distillation BTX Separation |
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