Fluid Phase Equilibria ( IF 2.8 ) Pub Date : 2022-02-03 , DOI: 10.1016/j.fluid.2022.113405
Rasoul Hassanalizadeh 1 , Wayne Michael Nelson 1 , Bradlee Kevin Naidoo 1 , Mojgan Ebrahiminejadhasanabadi 1 , Paramespri Naidoo 1, 2 , Deresh Ramjugernath 1, 2
![]() |
The close-boiling and azeotropic nature of the tetrafluoromethane and nitrogen trifluoride binary mixture complicates its separation. Extractive distillation using 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether as an entrainer is investigated for the separation of tetrafluoromethane and nitrogen trifluoride. Isothermal phase equilibrium data were measured for the binary systems of tetrafluoromethane + 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether and nitrogen trifluoride + 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether between temperatures of (283.15 to 303.15) K. The binary phase equilibrium data reveal that the proposed solvent has an affinity for nitrogen trifluoride. The data were modeled using the Peng-Robinson equation of state. The theoretical design and optimization of the extractive distillation process was performed in Aspen Plus. The optimal operating parameters were found by minimizing the total annual cost of the process. The new solvent was benchmarked against the processes proposed in the literature.
中文翻译:

物理分离纯化三氟化氮
四氟甲烷和三氟化氮二元混合物的密沸和共沸特性使其分离复杂化。研究了以1,1,2,2-四氟乙基2,2,3,3-四氟丙基醚为共沸剂的萃取蒸馏分离四氟甲烷和三氟化氮的方法。测量四氟甲烷 + 1,1,2,2-四氟乙基 2,2,3,3-四氟丙基醚和三氟化氮 + 1,1,2,2-四氟乙基 2,2,3 二元体系的等温相平衡数据,3-四氟丙基醚在 (283.15 至 303.15) K 的温度之间。二元相平衡数据表明,所提出的溶剂对三氟化氮具有亲和力。使用 Peng-Robinson 状态方程对数据进行建模。萃取蒸馏过程的理论设计和优化在 Aspen Plus 中进行。通过最小化该过程的年总成本来找到最佳操作参数。新溶剂以文献中提出的工艺为基准。