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《Journal of Chemical Industry and Engineering(China)》 2002-01
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EXPERIMENTAL STUDY ON PACKED EXTRACTION COLUMN AGITATED WITH AIR

XIONG Jieming,SONG Yongji,REN Xiaoguang and ZHANG Liping (Department of Chemical Engineering,Beijing Institute of Petrolchemical Technology,Beijing 102600,China)  
Air was fed into a packed extraction column to increase turbulence,enhance liquid droplet dispersion and surface renewal,and thus raise mass transfer area.This led to improvement of liquid-liquid contact and mass transfer.The experiments on hydrodynamics and mass transfer were carried out with air-kerosene (benzoic acid)-water system, and the effect of air agitation was investigated.It is clear from the results that the air hold-up ,dispersed phases hold-up and mass transfer coefficient increase and flooding velocity goes down while increasing superficial air velocity.The over-agitation of air can cause over-dispersion and emulsification of the dispersed phase,deterioration of mass transfer performance,and even flooding.Packing helps to break up the droplet of dispersed phase and can effectively prevent the liquid from longitudinal mixing in extraction column,so the mass transfer performance of packed column is far better than that of non-packed.
【CateGory Index】: TQ028.32
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【Co-references】
Chinese Journal Full-text Database 10 Hits
1 Xiong Jieming (Department of Chemical Engineering, Beijing Institute of Petro-chemical Technology, Beijing 102617) Zhang Liping (Department of Automation,Beijing Institute of Petro-chemical Technology, Beijing 102617);Effects of Gas-agitation on Packed and Spray Columns[J];Journal of Beijing Institufe of Petrochemical Technology;2002-02
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