摘要
在直径0.10m、高1.05m 的鼓泡塔中,对空气-水、乙醇、5%NaCl(aq)、5%KCl(aq)、5%CaCl_2(aq)、5%Na_2SO_4(aq)、2.34%MgCl_2(aq)等物系气含率的温度效应和电解质效应进行了实验研究。通过引入((P+Ps)/P)数群很好地关联了气含率的温度效应,找出了气含率的电解质校正因子与液相离子强度的关系。
The effects of temperature and electrolyte on gas holdup were studied in a bubble column for the systems of air-water,alcohol,5%NaCl,5%kCl,5%CaCl_2,5%Na_2SO_4,and 2.34%MgCl_2. The bubble column is 0.10m in diameter and 1.05m in height.Gas holdup was measured with the method of reverse U-tube manometer.Since gas holdup in the bubble column increases greatly with the increase of temperature,so its effect should not be neglected in the design and scaleup of bubble columns.The equation ε_G=0.152f■^(-0.154)((P+Ps)/P)^(1.61)((u_Gμ_L)/(σ_L))^(0.590) correlates indirectly the relation between gas holdup and temperature.When there are electrolytes in the liquid phase,gas holdup increases with both the temperature and the ionic intensity.At room temperature,the electrolyte factor follows the equation f=1+0.776I-0. 510I^2.The above two e- quations can be used in the design and scaleup of bubble columns.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
1991年第1期103-107,共5页
Chemical Reaction Engineering and Technology
基金
国家自然科学基金项目
关键词
鼓泡塔
气含率
温度
电解质
效应
Bubble column
Gas holdup
Hydrodynamics
Temperature effect
Electrolyte effect
