摘要
文章测定了丙烷-甲苯二元物系的等温气液相平衡数据。实验数据的相平衡温度包括326.2,333.2,350.2,368.2和378.2 K,相平衡压力从285.1—1 897.4 k Pa。经面积检验和点检验,各组实验数据基本符合热力学一致性。根据工程模拟计算的经验,回归了Wilson-HOC活度系数方程参数和SRK状态方程参数。分析了拟合结果的偏差,比较得知:丙烯和丙烷在甲苯中的溶解性相似,且随温度的升高,丙烯和丙烷在甲苯中的分配系数都减小。进一步提出了相平衡组成的循环迭代收敛计算方法,并选用丙烯-水物系进行了检验,讨论了2种方法的应用范围。
Isothermal vapor-liquid equilibrium data of propane-toluene system were measured at 326. 2,333. 2,350. 2,368. 2,378. 2 K,from 285. 1 to 1 897. 4 k Pa. The experimental data conformed to the thermodynamic consistency by area test and point test. According to engineering simulation experience,the VLE data were correlated by Wilson-HOC equation and SRK equation, and the equation parameters were calculated. The equilibrium properties（ p-T-x-y） of propylene-toluene and propane-toluene systems are similar,and both the phase equilibrium ratios of propylene and propane decrease with the increasing temperature in the two systems. What＇ s more,the loop iteration convergence computing method was proposed,the propylene-water system was selected to verify the method,and the application of above two methods was discussed.
出处
《化学工程》
CAS
CSCD
北大核心
2016年第4期50-53,共4页
Chemical Engineering(China)
关键词
气液相平衡
流程模拟
计算方法
丙烷
甲苯
vapor-liquid equilibrium
flow sheet simulation
calculation method
propane
toluene
