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In relation to this article, we declare that there is no conflict of interest.
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Received January 24, 2019
Accepted May 20, 2019
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Hydrodesulfurization via heat exchanger network synthesis for ultra-low-sulfur diesel

1Graduate School of Integrated Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea 2DOFTECH Corp, 301 83, Baekbeom-ro 1-gil, Mapo-gu, Seoul 04104, Korea 3Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea 4Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
minoh@hanbat.ac.kr
Korean Journal of Chemical Engineering, August 2019, 36(8), 1226-1234(9), 10.1007/s11814-019-0301-3
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Abstract

In recent decades, the oil refining industry’s interest has been geared toward the production of clean fuels that contain fewer impurities such as sulfur and nitrogen compounds. Diesel hydrodesulfurization (DHDS) employed in light gas oil production has been widely applied to remove various impurities such as sulfur, nitrogen, and metalorganic compounds. In this study, the hydrodesulfurization process for the production of ultra-low sulfur diesel was simulated using the Aspen HYSYS hydroprocessing bed module. Then, exergy analysis was conducted. Since the exergy analysis indicated possible energy savings on the conventional DHDS, heat exchanger network (HEN) synthesis was applied to the process. By replacing the heater and cooler with two heat exchangers, 5% of utility energy could be saved compared to the conventional process. Since the modification was relatively simple, the developed HEN synthesis is feasible in the present DHDS.

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