湍流状态下二氧化碳-水相平衡体系压力的偏移  

Deviation of the carbon dioxide-water gas-liquid balance from thermodynamic equilibrium when in turbulence

作　　者：张珍禛[1] 钱智[2] 罗会娟[1] 宋俊男[1] 江小波[1] 郭锴[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国科学院研究生院,北京100049

出　　处：《北京化工大学学报（自然科学版）》2013年第3期6-11,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：中国科学院研究生院院长基金(Y15101JY00);国家"973"计划(2009CB219903);国家自然科学基金(21106176);中国博士后科学基金特别资助(2012T50155)

摘　　要：以二氧化碳-水体系为对象,研究了流体流动和温度变化对气液相平衡体系压力的影响。常压环境中,在温度为288.15～303.15 K区间内每隔5 K取一个温度实验,在流速范围为1～3 m/s区间内每隔0.5 m/s取一个流速进行实验,使二氧化碳饱和水溶液在设计管路中流动。实验结果显示,动态平衡偏移率与液相流速成正比,与实验温度成反比。在实验条件下,动态平衡偏移率最大可达15%。对实验数据拟合后,得到动态平衡偏移率的表达式为r=6.3142×10-10(Re)1.6549(μl/μg)1.0580(适用范围为7500<Re<42000,288.15 K<T<303.15 K)。液相湍动达到一定程度后,流动对二氧化碳-水体系相平衡偏移的影响明显,生产过程中,可以使用升高温度和增加液相扰动结合的方法,增加二氧化碳及其饱和水溶液的分离效率。The carbon dioxide-water system has been employed for a flowing gas-liquid equilibrium investigation.The experiment was carried out in a constant volume vessel which was connected to a horizontal circulation pipe and a peristaltic pump.The experiments were carried out at temperatures of 288.15K-303.15K with an interval of 5K,and flow velocities of 1m/s-3m/s with an interval of 0.5m/s.The temperature and pressure data were recorded by a computer system.The results showed that the ratio of the excess carbon dioxide in the gas phase to the thermodynamic equilibrium amount of carbon dioxide in the liquid（r） was proportional to the flow velocity and inversely proportional to the temperature.The correlation of r was gained by fitting experimental data as r=6.3142×10-10（Re）1.6549（μl/μg）1.0580（7500Re42000,288.15KT303.15K）.Under the experimental conditions employed,the maximum value of r that could be attained was 15%.

关 键 词：二氧化碳-水体系 动态平衡偏移 雷诺数 液气黏度比 

分 类 号：TQ016[化学工程]