摘要
四氢呋喃与乙醇会形成最低共沸物,其共沸组成随着压力改变而不同,变压精馏是分离共沸混合物的一种有效方法。在热力学分析基础上,提出了四氢呋喃-乙醇液体混合物变压精馏分离的双塔工艺流程,并在Aspen Plus流程模拟软件中,采用NRTL物性方法,对变压精馏分离工艺过程进行模拟计算。计算结果表明:由常压塔和300kPa加压塔组成的双塔变压精馏工艺流程可将四氢呋喃-乙醇共沸物进行较好分离,所得乙醇和四氢呋喃的质量分数均达到99.5%。
Tetrahydrofuran(THF)and ethanol form a liquid mixture with lowest azeotropic point,and their azeotropic composition changes with the pressure,Pressure-swing distillation(PSD)is one of the efective methods for separating azeotrope.A dual columns PSD process flow of THF-ethanol was put forward based on thermodynamics analysis.The software Aspen Plus was used to simulate the THF-ethanol PSD process by choosing NRTL physical property method.The simulation result shows that THF-ethanol azeotrope can be effectively separated by means of a two-column PSD process,which composed of atmospheric tower and 300kPa pressure tower,all of the mass fraction of ethanol and THF are reached 99.5%therefore.
作者
邢跃军
景昆
夏慧敏
李传峰
郭峰
Xing Yue-jun;Jing Kun;Xia Hui-ming;Li Chuan-feng;Guo Feng
出处
《化工设计通讯》
CAS
2022年第6期3-5,148,共4页
Chemical Engineering Design Communications
关键词
变压精馏
共沸物
四氢呋喃-乙醇分离
模拟计算
pressure-swing distillation
azeotrope
Separation of Tetrahydrofuran-ethanol
simulation
