CO_2-氯铝酸离子液体-苯三组分物系气液平衡数据的测定

Gas-Liquid Equilibrium Data of CO_2-Chloroaluminate Ionic Liquid-Benzene Ternary System

在40℃、3.00～11.80MPa的条件下,测定了CO2-溴代-1-叔丁基-3-甲基咪唑-氯铝酸([Bmim]Br-AlCl3)-苯三组分物系的气液相平衡数据,获得了三组分物系的相图,分析了平衡压力对相态及平衡组成的影响。实验结果表明,在恒定的温度、压力下,由于平衡组成的不同,CO2-[Bmim]Br-AlCl3-苯三组分物系存在一相到三相的多种相态;当压力从3.00MPa升至11.80MPa时,富苯相中CO2的质量分数从0.114增至0.640,苯的质量分数由0.703降至0.196;当压力达到CO2的临界压力范围时,有新相生成,物系发生相态的改变,三相区变为四相区,两相区变为三相区。

Equilibrium data of CO2-1-butyl-3-methyl-imidazolium bromide-aluminium chloride （ [ Bmim ] Br-AlCl3 ）-benzene ternary system at 40℃and 3.00 - 11.80 MPa were presented and corresponding ternary phase diagrams were plotted. Effect of pressure on phase equilibrium compositions was discussed. The result demonstrated that one, two or three phases coexist in the system in accordance with different equilibrium compositions at constant temperature and pressure. When pressure increased from 3, 00 to 11. 80 MPa, mass fraction of CO2 in rich benzene liquid phase increased from 0.114 to 0. 640, and mass fraction of benzene decreased from 0, 703 to 0. 196. When pressure reaches critical zone of CO2, two-or three-phases convert into three-or four-phases respectively.