摘要
考察了在气相中加入少量乙醇对水吸收CO2过程中液相界面对流的影响。采用粒子成像测速仪(PIV)测定了这一气体吸收过程中液体瞬时流场。通过对液体流场信息进行处理,得到了不同条件下速度和湍动能的数据及其分布;根据流场内速度和湍动能及其分布结构,定量分析了气相中加入乙醇对气液传质过程界面对流的影响,发现气相中乙醇的加入导致了局部Marangoni效应,很大程度上增大了界面附近的对流,为促进气液传质提供了依据。
The effect of ethanol contamination in gas phase on the liquid interracial convection in the absorption process of CO2 into water was investigated. The instantaneous velocity field of liquid was measured experimentally via particle image veloeimetry （PIV）. The data of velocity and turbulent kinetic energy under different conditions were obtained by processing the measurement data. Then the effect of added ethanol into the gas phase on interracial convection in gas-liquid mass transfer process was quantitatively analyzed according to the velocity, turbulent kinetic energy and their distributions. It was observed that the addition of ethanol in the gas phase generated local Marangoni effect, which largely induced the convection near the interface and could be known as promising in intensifying the mass transfer of such a process.
出处
《化学工业与工程》
CAS
2014年第5期54-58,共5页
Chemical Industry and Engineering
基金
国家自然科学基金资助项目(20736005)
