摘要
在内径为25mm的连续逆流喷淋塔内进行了流体力学特性和质量传递性能的研究,实验压力为(8～14)MPa,实验温度为35℃,实验体系为CO_2/异丙醇/水和CO_2/乙醇/水.建立了描述连续逆流超临界流体喷淋萃取塔的流体力学关联式,根据双膜理论,建立了用于计算液相总体积传质系数的质量传递模型.流体力学关联式和质量传递模型的计算值与实验结果符合较好.
The study on hydrodynamics and mass transfer performance is carried out in a 25 mm diameter continuous countercurrent supercritical fluid extraction spray column. The range of experimental pressure is from 8 to 14 MPa and the temperature is 35℃. The testing systems arecarbon dioxide-isopropanol-water and carbon dioxide-ethanol-water. A model for describing two-phase flow in the supercritical fluid extraction spray column is obtained. A new model based on two film theory for calculating overall volumetric mass transfer coefficient is developed. Both of the two models match experimental data well.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1997年第1期67-73,共7页
CIESC Journal
基金
国家自然科学基金资助项目(No.29070269)
关键词
超临界流体
液体力学
萃取塔
分离
传质
supercritical fluid, mass transfer, hydrodynamics, extraction spray column
