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Simulation and optimization of aromatic extraction from lube oil cuts by liquid-liquid extraction
Chemical Engineering Research and Design ( IF 3.9 ) Pub Date : 2020-11-02 , DOI: 10.1016/j.cherd.2020.10.026
Mohammad Taghi Fouladvand , Javad Asadi , Mohammad Nader Lotfollahi

The simulation and optimization of aromatic extraction process from lube oil cuts using furfural as a solvent are conducted by linking the Aspen Plus simulator and MATLAB. The standard ASTM experiments are performed for determining density, refractive index, and viscosity of oil cut to apply the pseudo-component approach. The NRTL model was used for modeling the liquid-liquid equilibrium (LLE) of the system, and the binary interaction parameters (BIP) were determined by regression with the phase equilibrium data. The modeling results demonstrated that by increasing the solvent to feed ratio and the extraction temperature, the refractive index and the yield of raffinate phase decrease; however, the value of the viscosity index and total energy consumption of the process is increased. Finally, multi-objective optimization using an evolutionary algorithm is conducted to present the best trade-offs between the extraction efficiency, refractive index, and process energy consumption. Also, the single optimum point obtained from optimizing the linear combination of objective functions showed that the values of raffinate phase yield and refractive index are 30.77% and 1.449, respectively. However, the energy consumption of the process increases by about 20% compared to the base case.



中文翻译:

液-液萃取从润滑油馏分中芳烃萃取的模拟和优化

通过将Aspen Plus模拟器和MATLAB链接在一起,可以对以糠醛为溶剂的润滑油馏分中的芳烃萃取过程进行模拟和优化。执行标准ASTM实验,以确定油馏分的密度,折射率和粘度,以应用伪组分方法。使用NRTL模型对系统的液-液平衡(LLE)进行建模,并使用相平衡数据通过回归确定二元相互作用参数(BIP)。建模结果表明,通过增加溶剂进料比和萃取温度,萃余相的折光率和收率降低。但是,该方法的粘度指数值和总能耗增加了。最后,使用进化算法进行多目标优化,以在提取效率,折射率和工艺能耗之间取得最佳平衡。另外,通过优化目标函数的线性组合获得的单个最佳点表明,萃余相产率和折射率的值分别为30.77%和1.449。但是,与基本情况相比,该过程的能耗增加了约20%。

更新日期:2020-11-13
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