柑青醛与新铃兰醛体系等压汽液相平衡研究

Isobaric vapor-liquid equilibrium for myrac aldehyde and lyral systems

采用静态法,利用Rose釜分别测定了柑青醛在368.65—409.35 K和新铃兰醛在391.85—416.35 K的饱和蒸气压,并用Antoine方程关联,得到柑青醛的3个参数A=-4.159,B=2 494.037,C=-626.842和新铃兰醛的3个参数A=10.701,B=558.048,C=-296.730。测定了柑青醛与新铃兰醛体系在321 Pa和432 Pa下的等压汽液相平衡数据,并通过热力学一致性检验。分别采用Wilson和NRTL模型对汽液平衡数据进行关联,利用所得模型参数计算出相应的汽相组成和温度,并与实验值比较,其平均偏差分别小于0.009 0和0.003 4,为建立柑青醛和新铃兰醛的精馏分离数学模型提供了基础数据。

The saturated vapor pressures of myrac aldehyde and lyral were measured by static method at 368.65-409.35 K and 391.85-416.35 K respectively.They were correlated by Antoine equation,with three parameters obtained as A=-4.159,B=2 494.037,C=-626.842 for myrac aldehyde,and three parameters obtained as A=10.701,B=558.048,C=-296.730 for lyral.Isobaric vapor-liquid equilibrium data of the binary system of myrac aldehyde and lyral were measured at 321 Pa and 423 Pa by Rose still and were confirmed by thermodynamic consistency check.Wilson and NRTL models were used to correlate the experimental data and vapor composition and temperature were calculated with model data.The average deviation between the correlated values and the experimental data of gas mole fraction is lower than 0.009 0 and 0.003 4,respectively.The data can be used for building the mathematical model of separating myrac aldehyde and lyral.