化学工程2011，Vol.39Issue(11)：83-87,5.
尿素溶液分离体系的汽液平衡
Vapor-liquid equilibrium of urea solution separation system
摘要
Abstract
The urea solution synthesized from NH3 and CO2 is composed of NH3, C02, H20 and NH2CONH2. The subsequent processes of decreased-pressure desorption and evaporation are related to the system of NH3-CO2-H2O-NH2CONH2(ACWU) vapor-liquid equilibrium, in which the hydrolysis reaction of urea can be neglected. The SRK equation of state was used to calculate the fugacity coefficients of vapor phase and the activity coefficients of the actual species in liquid phase was described by the extended UNIQUAC equation. A set of temperature-dependent interactive energy parameters of the extended UNIQUAC equation were obtained by simplex method to calculate the ACWU VLE in the conditions of temperature from 60℃ to 160℃, pressure up to 3. 0 Mpa and the mole fraction of NH3 up to 0. 3. It shows that the results of simulation are consistent very well with the literature data.关键词
NH3-CO2-H2O-NH2CONH2/汽液平衡/扩展型UNIQUAC方程/二元相互作用能参数Key words
NH3-CO2-H2O-NH2C0NH2/VLE/extended UNIQUAC equation/interactive-energy parameters分类
化学化工引用本文复制引用
魏顺安,杨楠,付雪梅,董立春,张舒雯..尿素溶液分离体系的汽液平衡[J].化学工程,2011,39(11):83-87,5.基金项目
中央高校基本科研业务费资助项目(CDJZR10220010) （CDJZR10220010）
