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Steady-state Simulation and Energy-saving Optimization of Monoethylene Glycol Production Process  

Kim, Tae Ki (Department of Chemical Engineering, Inha University)
Jeon, In Cheol (Department of Cosmetics, Jai-Neung College)
Chung, Sung Taik (Department of Chemical Engineering, Inha University)
Publication Information
Korean Chemical Engineering Research / v.46, no.5, 2008 , pp. 903-914 More about this Journal
Abstract
This study was undertaken for the production capacity expansion and energy saving through entire process simulation and optimization for the commercial process of manufacturing monoethylene glycol as a staple from ethylene oxide. Aspen $Plus^{TM}$(ver. 2006) was employed in the simulation and optimization work. The multicomponent vapor-liquid equilibria involved in the process were calculated using the NRTL-RK equation. As for the binary interaction parameters required for a total of 91 binary systems, those for 8 systems were self-supplied by the simulator, those for 28 systems were estimated through regression of the VLE data in the literature, and the remainder were estimated with the estimation system built in the simulator. Subsequent to ascertaining the accuracy of the generated parameters through comparison between actual and simulated process data, sensitive variables highly affecting the process were searched and selected using sensitivity analysis tool in the simulator. The optimum operating conditions minimizing the total heat duty of the process were investigated using the optimization tool based on the successive quadratic programming in the simulator.
Keywords
Monoethylene Glycol Process; NRTL-RK Equation; Simulation; Energy Saving; Optimization;
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