Reducing the bubble size is regarded as an effective method to enhance mass transfer of gas-liquid bubbling systems.However,in contaminated liquids,studies have shown that smaller bubbles may be more severely affected by contaminants within the system.The experimental study of the rising absorption process of single CO2 bubbles in aqueous solution containing pollutants was carried out,and the influence of pollutant concentration and initial bubble size on the motion and mass transfer characteristics of single bubbles was investigated.The results indicated that an increase in contaminant concentration decreased bubble rising velocity and mass transfer efficiency,but there was an upper limit to this effect.The initial bubble size also affected the mass transfer efficiency.Under certain contamination conditions,larger bubbles exhibit an advantage at higher rising heights.
关键词
单气泡/吸收/传质/表面活性剂/运动特性
Key words
single bubble/absorption/mass transfer/surfactants/motion characteristic
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