New approach to calculate the VLE of NH3-CO2-H2O-urea system with extended UNIQUAC equation

被引：0

作者：

Zhang, Xiang-Ping ^{[1
,2
]}

Sun, Li ^{[1
]}

Yao, Ping-Jing ^{[1
]}

Yuan, Yi ^{[1
]}

机构：

[1] Sch. of Chem. Eng., Dalian Univ. of Technol., Dalian 116012, China

[2] Inst. of Process Eng., Chinese Acad. of Sci., Beijing 100080, China

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2002年 / 16卷 / 04期

关键词：

Calculations - Carbon dioxide - Electrolytes - Urea;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The vapor-liquid equilibrium data are of great importance to urea process simulation. Based on the extended UNIQUAC equation which is commonly used to calculate the liquid activity coefficients of volatile electrolyte system, the groups of species was proposed to replace the real species and it makes the number of interaction parameters used in the equation for the multicomponent volatile electrolyte system obviously reduced. Using this groups of species approach, the vapor-liquid equilibrium (VLE) of NH3-CO2-H2O-urea system in the range of middle and low pressure was calculated and the simulating calculating of the flash of stripping solution was also made. Those calculation results were compared with the experimental data. It showed that the new approach had a good accuracy.

引用

页码：355 / 360