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Mechanism Analysis and Multiobjective Optimization of Efficient and Energy-Saving Separation of Green Fuel Additives via Extractive Pressure Swing Distillation with an Ionic Liquid Mixed Entrainer
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-03-15 , DOI: 10.1021/acs.iecr.4c00009 Haiyang Cheng 1 , Kaicong Wang 1 , Yangyang Wang 1 , Gang Zhao 1 , Zhaoyou Zhu 1 , Jianguang Qi 1 , Limei Zhong 1 , Yinglong Wang 1 , Hongru Zhang 1 , Peizhe Cui 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-03-15 , DOI: 10.1021/acs.iecr.4c00009 Haiyang Cheng 1 , Kaicong Wang 1 , Yangyang Wang 1 , Gang Zhao 1 , Zhaoyou Zhu 1 , Jianguang Qi 1 , Limei Zhong 1 , Yinglong Wang 1 , Hongru Zhang 1 , Peizhe Cui 1
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A mixed system for separation of green fuel additives containing diethyloxymethane and ethanol by extractive pressure swing distillation for ionic liquids mixed with organic solvents as an entrainer was proposed for the first time. The interaction mechanism between entrainers and the azeotrope was deeply explored via quantum chemistry and molecular dynamics methods. The optimal ionic liquid entrainer was determined as 1-buty-3-methylimidazolium acetate, and the most suitable organic solvent as the entrainer was p-diethylbenzene. The separation process of the ethanol, diethyloxymethane, and toluene system was developed. The process operation parameters were optimized through a multiobjective optimization method. In order to improve the energy utilization and separation efficiency of the process, a heat pump-assisted extractive pressure swing distillation process was proposed. Compared with the mixed entrainer extractive distillation process, the heat pump-assisted extractive pressure swing distillation process reduced TAC by 1.2% and gas emissions by 17.5%, demonstrating economic advantages and environmental protection effects. This work demonstrates the application of ionic liquid mixed solvents in systems containing green fuel additives, providing guidance for the screening and application of ionic liquid as an entrainer.
中文翻译：
离子液体混合共沸剂萃取变压精馏绿色燃料添加剂高效节能分离机理分析及多目标优化
首次提出了以有机溶剂为共沸剂的离子液体变压萃取精馏分离含有二乙氧基甲烷和乙醇的绿色燃料添加剂的混合体系。通过量子化学和分子动力学方法深入探讨了共沸剂与共沸物之间的相互作用机制。确定最佳的离子液体共沸剂为1-丁基-3-甲基咪唑乙酸盐，最适宜的有机溶剂为对二乙苯。开发了乙醇、二乙氧基甲烷、甲苯系统的分离工艺。通过多目标优化方法对工艺操作参数进行优化。为了提高该工艺的能量利用率和分离效率，提出了热泵辅助萃取变压精馏工艺。与混合共沸剂萃取精馏工艺相比，热泵辅助萃取变压精馏工艺可减少TAC 1.2%，气体排放量减少17.5%，展现出经济优势和环保效果。该工作展示了离子液体混合溶剂在含绿色燃料添加剂体系中的应用，为离子液体作为共沸剂的筛选和应用提供指导。
更新日期：2024-03-15
中文翻译：
离子液体混合共沸剂萃取变压精馏绿色燃料添加剂高效节能分离机理分析及多目标优化
首次提出了以有机溶剂为共沸剂的离子液体变压萃取精馏分离含有二乙氧基甲烷和乙醇的绿色燃料添加剂的混合体系。通过量子化学和分子动力学方法深入探讨了共沸剂与共沸物之间的相互作用机制。确定最佳的离子液体共沸剂为1-丁基-3-甲基咪唑乙酸盐，最适宜的有机溶剂为对二乙苯。开发了乙醇、二乙氧基甲烷、甲苯系统的分离工艺。通过多目标优化方法对工艺操作参数进行优化。为了提高该工艺的能量利用率和分离效率，提出了热泵辅助萃取变压精馏工艺。与混合共沸剂萃取精馏工艺相比，热泵辅助萃取变压精馏工艺可减少TAC 1.2%，气体排放量减少17.5%，展现出经济优势和环保效果。该工作展示了离子液体混合溶剂在含绿色燃料添加剂体系中的应用，为离子液体作为共沸剂的筛选和应用提供指导。
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