In this work, the process simulation of pressure-swing distillation(PSD) and extractive distillation(ED) using ionic liquid(IL) 1-butyl-3-methylimidazolium acetate([bmim][OAc]) as the entrainer for separation of ethyl...In this work, the process simulation of pressure-swing distillation(PSD) and extractive distillation(ED) using ionic liquid(IL) 1-butyl-3-methylimidazolium acetate([bmim][OAc]) as the entrainer for separation of ethyl acetateethanol-water mixture is performed. The design parameters of the two distillation processes are optimized with the minimum total annual cost(TAC) serving as the objective function. The results show that the TAC saving of ED process is 35.27% in comparison with that of PSD process in the case of achieving the same purity and yield of ethyl acetate.In addition, the dynamic controllability of ED process is further studied. The traditional two-point temperature control structure is proposed for the ED process, and it works pretty well while taking into account the disturbances in both feed rate and feed composition.展开更多
分别利用流程模拟软件VMGSim和超临界溶剂抽提减黏装置,对乙烯装置急冷油进行超临界溶剂抽提减黏的模拟和实验研究。以异丁烷为溶剂,在抽提压力3~6 MPa、抽提温度120~150℃范围内,对中国石化天津石化分公司乙烯装置的急冷油进行超临界...分别利用流程模拟软件VMGSim和超临界溶剂抽提减黏装置,对乙烯装置急冷油进行超临界溶剂抽提减黏的模拟和实验研究。以异丁烷为溶剂,在抽提压力3~6 MPa、抽提温度120~150℃范围内,对中国石化天津石化分公司乙烯装置的急冷油进行超临界溶剂抽提减黏。实验结果表明,急冷油的黏度（50℃）从1 000 m Pa·s降至10 m Pa·s以下,抽提率最高可达0.53。模拟结果与实验结果基本一致,模拟结果中抽提条件对减黏效果的影响更有规律性;提高抽提压力或降低抽提温度,可提高抽提率,并略微提高抽提油黏度。展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 21676299 and 21476261)
文摘In this work, the process simulation of pressure-swing distillation(PSD) and extractive distillation(ED) using ionic liquid(IL) 1-butyl-3-methylimidazolium acetate([bmim][OAc]) as the entrainer for separation of ethyl acetateethanol-water mixture is performed. The design parameters of the two distillation processes are optimized with the minimum total annual cost(TAC) serving as the objective function. The results show that the TAC saving of ED process is 35.27% in comparison with that of PSD process in the case of achieving the same purity and yield of ethyl acetate.In addition, the dynamic controllability of ED process is further studied. The traditional two-point temperature control structure is proposed for the ED process, and it works pretty well while taking into account the disturbances in both feed rate and feed composition.
文摘分别利用流程模拟软件VMGSim和超临界溶剂抽提减黏装置,对乙烯装置急冷油进行超临界溶剂抽提减黏的模拟和实验研究。以异丁烷为溶剂,在抽提压力3~6 MPa、抽提温度120~150℃范围内,对中国石化天津石化分公司乙烯装置的急冷油进行超临界溶剂抽提减黏。实验结果表明,急冷油的黏度（50℃）从1 000 m Pa·s降至10 m Pa·s以下,抽提率最高可达0.53。模拟结果与实验结果基本一致,模拟结果中抽提条件对减黏效果的影响更有规律性;提高抽提压力或降低抽提温度,可提高抽提率,并略微提高抽提油黏度。
