摘要
用双循环式加压汽液平衡装置分别测定了苯和乙醇在300—445K范围内的饱和蒸气压,并用线性优化法求取了在实测温度范围内的Antoine常数。用同一装置测定了苯-乙醇、正庚烷-乙醇在101.3、302.5、506.8、709.3和810.6 kPa下的汽液相平衡数据。对实测数据及苯-正庚烷体系在相应压力下的汽液平衡数据进行了热力学关联,其中汽相用二阶维里方程,液相用Wilson、NRTL、UNIQUAC方程关联,同时还用共沸单点法对苯-乙醇、正庚烷-乙醇体系的实测数据进行了关联。两种关联方法的计算结果与实测值作了比较,均获得了较为满意的结果。
The saturated vapor pressures of benzene and ethanol in the range of 300-445K were determined seperately in the dual circulating vapor-liquid equilibrium device under pressure. The Antoine constants in the corresponding temperature range were obtained with linear optimization method. The correlated results were in good agreement with the experimental data and those in the literature. The vapor-liquid eqiuiblruim(VLE) data of benzene-athanol and n-heptane-ethanol binary systems under pressure of 101.3, 302.5, 506.8, 709.3, 810.6kPa were determined in the same device. The experimental data of benzene-n-heptane binary system under pressure were correlated. It is suitable to correlate these three binary systems with B-truncated Virial equatio for vapor and Wilson activity coefficient model for liquid phase in the pressure studied range. The VLE data under pressure for benzene-ethanol and n-heptane-ethanol binary systems were also correlated with azeotrope method, and good results were obtained.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1990年第2期185-192,共8页
Journal of Fuel Chemistry and Technology
基金
国家教委基金
关键词
苯
正庚烷
乙醇
二元体系
汽液平衡
vapor liquid equilibrium under pressure
benzene
n-heptane
ethanol
