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Energy saving of benzene separation process for environmentally friendly gasoline using an extended DWC (divided wall column)

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  • Kim, Young Han

Abstract

Benzene is a known carcinogen, and is desired to be removed from the gasoline additive for environmental reason. A benzene removal process from the additive, reformate of catalytic reformers, is proposed utilizing an extended DWC (divided wall column). The DWC reduces the processing load of the whole process especially in extractor, which employs high boiling point solvent requiring large amount of energy and costly utility. In this study the design of the proposed process is addressed along with the evaluation of energy saving, economics and thermodynamic efficiency. The evaluation results indicate the heating duty reduction of 56.8% from the proposed process over the conventional process and 64.6% reduction of cooling duty. The economics reveals the 26% reduction of investment and 56% reduction of utility cost from the proposed process. However, no significant improvement of thermodynamic efficiency is yielded.

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  • Kim, Young Han, 2016. "Energy saving of benzene separation process for environmentally friendly gasoline using an extended DWC (divided wall column)," Energy, Elsevier, vol. 100(C), pages 58-65.
    • Handle: RePEc:eee:energy:v:100:y:2016:i:c:p:58-65
    DOI: 10.1016/j.energy.2016.01.087
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    References listed on IDEAS

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    1. Suphanit, B. & Bischert, A. & Narataruksa, P., 2007. "Exergy loss analysis of heat transfer across the wall of the dividing-wall distillation column," Energy, Elsevier, vol. 32(11), pages 2121-2134.
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    3. Kim, Young Han, 2014. "Application of partially diabatic divided wall column to floating liquefied natural gas plant," Energy, Elsevier, vol. 70(C), pages 435-443.
    4. Shahandeh, H. & Ivakpour, J. & Kasiri, N., 2014. "Internal and external HIDiCs (heat-integrated distillation columns) optimization by genetic algorithm," Energy, Elsevier, vol. 64(C), pages 875-886.
    5. Suphanit, B., 2010. "Design of internally heat-integrated distillation column (HIDiC): Uniform heat transfer area versus uniform heat distribution," Energy, Elsevier, vol. 35(3), pages 1505-1514.
    6. Shahandeh, Hossein & Ivakpour, Javad & Kasiri, Norollah, 2014. "Feasibility study of heat-integrated distillation columns using rigorous optimization," Energy, Elsevier, vol. 74(C), pages 662-674.
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    Cited by:

    1. Zhao, Yongteng & Ma, Kang & Bai, Wenting & Du, Deqing & Zhu, Zhaoyou & Wang, Yinglong & Gao, Jun, 2018. "Energy-saving thermally coupled ternary extractive distillation process by combining with mixed entrainer for separating ternary mixture containing bioethanol," Energy, Elsevier, vol. 148(C), pages 296-308.
    2. Zhang, Hongru & Wang, Shuai & Tang, Jiaxuan & Li, Ningning & Li, Yanan & Cui, Peizhe & Wang, Yinglong & Zheng, Shiqing & Zhu, Zhaoyou & Ma, Yixin, 2021. "Multi-objective optimization and control strategy for extractive distillation with dividing-wall column/pervaporation for separation of ternary azeotropes based on mechanism analysis," Energy, Elsevier, vol. 229(C).

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