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Application of An Energy-Efficient Distillation System using Three Columns to Hexane Process  

Kim, Young-Han (Department of Chemical Engineering, Dong-A University)
Hwang, Kyu-Suk (Department of Chemical Engineering, Pusan National University)
Publication Information
Korean Chemical Engineering Research / v.43, no.1, 2005 , pp. 39-46 More about this Journal
Abstract
Though a fully thermally coupled distillation column-an energy efficient distillation system-consumes less energy, it is not widely implemented in practice due to its operational difficulty. A 3-column distillation system having improved operability is proposed here, and its energy saving performance and application related issues are investigated from the implementation result to a practical hexane process. When an energy integration is employed, the proposed system requires 18% less energy than a conventional 2-column system, which is found from the HYSYS simulation. Though more control loops than the 2-column system are required, the proposed system has better controllability of product compositions and the pressure control of the system is easier.
Keywords
Distillation; Ternary Separation; Energy-Efficient Distillation; Hexane Process;
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