正己烷–乙酸乙酯–乙醇萃取精馏工艺经济–环境–安全多目标优化
Integrated Economic, Environmental, and Safety Multi-Objective Optimization of Extractive Distillation for N-Hexane-Ethyl Acetate-Ethanol Separation
DOI: 10.12677/hjcet.2025.156029, PDF,    科研立项经费支持
作者: 朱子豪, 冯雅旋, 冯泽民*：重庆科技大学安全科学与工程学院，重庆；樊松迪：重庆大学化学化工学院，重庆
关键词: 萃取精馏；多目标优化；本质安全；工艺优化；多准则决策；Extractive Distillation； Multi-Objective Optimization； Inherent Safety； Process Optimization； Multi-Criteria Decision Making
摘要: 本文针对正己烷、乙酸乙酯和乙醇三元共沸混合物的分离难题，设计并优化了一种以二甲基亚砜(DMSO)为萃取剂的萃取精馏工艺。通过将Aspen Plus与Python相结合，构建了多目标优化框架，并采用NSGA-II算法以最小化年度总成本(TAC)、CO2排放量和本质安全指数为优化目标。结果表明，三个优化目标之间存在显著的权衡关系，然而，利用基于熵权重的TOPSIS方法能够识别出实现平衡性能的最优解。优化后的工艺流程中，正己烷、乙酸乙酯和乙醇的产品纯度分别达到99.90%、99.96%和99.96%，以3年投资回收期计算，TAC为29.95 × 105 $/a。CO2排放量为1493.69 kg-CO2/h，本质安全指数为240.76。
Abstract: This study addresses the separation challenge of the ternary azeotropic mixture of n-hexane, ethyl acetate, and ethanol by designing and optimizing an extractive distillation process using dimethyl sulfoxide (DMSO) as the entrainer. A multi-objective optimization framework was developed by integrating Aspen Plus with Python, and the NSGA-II algorithm was employed with the objectives of minimizing the total annual cost (TAC), CO₂ emissions, and process route index. The results indicate significant trade-offs among the three objectives; however, the entropy-weighted TOPSIS method successfully identified an optimal solution that achieves balanced performance. In the optimized flowsheet, the product purities of n-hexane, ethyl acetate, and ethanol reached 99.90%, 99.96%, and 99.96%, respectively. With a payback period of three years, the TAC was calculated as 29.95 × 10⁵ $/a, while CO₂ emissions and the process route index were 1493.69 kg-CO₂/h and 240.76, respectively.
文章引用：朱子豪, 樊松迪, 冯雅旋, 冯泽民. 正己烷–乙酸乙酯–乙醇萃取精馏工艺经济–环境–安全多目标优化[J]. 化学工程与技术, 2025, 15(6): 307-321. https://doi.org/10.12677/hjcet.2025.156029

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