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- W2890818542 abstract "Abstract As an excellent solvent, ionic liquids (ILs) have received much attention in the last two decades. One of the most important applications is to be used as an extractant for separation of azeotropic mixtures via extractive distillation (ED). In this work, 1-ethyl-3-methylimidazolium dicyanamide ([emim][N(CN)2]) is selected as the extractant to separate isopropanol (IPA)-water azeotrope based on two ED processes. Multi-objective genetic algorithm (MOGA) is used to determine the operating parameters for these ED processes. Total annual cost (TAC), efficiency indicator of extractive section (Eext), efficiency indicator of per tray in extractive section (eext) and energy consumption per product flow rate (GEC) are selected as objective functions in the ED process optimization, and the Pareto front provides a series of solutions satisfying the constraints with different operating parameters. The results show that TAC of the process 2 with two evaporators used in the phase of solvent recovery is 4.26% lower than that of process 1 with one evaporator. In addition, the thermodynamic efficiency (η) and CO2 emissions are calculated for different cases, and they provide the reference for the selection of operating parameters. On this basis, the control structures of ED processes are further studied, and the traditional two-point temperature control structure works pretty well for disturbances of both feed rate and feed composition." @default.
- W2890818542 created "2018-09-27" @default.
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- W2890818542 date "2019-01-01" @default.
- W2890818542 modified "2023-10-16" @default.
- W2890818542 title "Design, optimization and control of extractive distillation for the separation of isopropanol-water using ionic liquids" @default.
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- W2890818542 doi "https://doi.org/10.1016/j.seppur.2018.09.021" @default.
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