Journal of South China University of Technology (Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (2): 102-108,117.doi: 10.3969/j.issn.1000-565X.2018.02.015

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Influence of Two-phase Flow Physical Properties on Emulsification Using Novel Parallelized Multi-Scale Channels
 

 ZHOU Peipei1 HU Xiaofang1 LI Qiong2 PENG Xiangfang1    

  1. 1． School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China; 2． School of Chemistry and Chemical Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2017-06-23 Revised:2017-09-20 Online:2018-02-25 Published:2018-01-02
  • Contact: 李琼( 1968-) ，女，博士，教授级高级实验师，主要从事化工过程传质、传热研究 E-mail:qiongli@scut.edu.cn
  • About author:周培培( 1987-) ，女，博士生，主要从事微通道两相流传热、传质研究
  • Supported by:
     Supported by the National Natural Science Foundation of China( 51573063， 51503069) 

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Abstract: In this paper，we study the development of novel multiscale parallel micro-channel contactor for monodisperse waterin-oil emulsification． Oils with different physical properties ( pure oil，0. 3% span83，0. 4% span83) and water are chosen as a continuous phase and a dispersed phase respectively． By using novel multiscale contactor ( sixteen parallel Ytype channels) which offers an equal distribution of flow rate with low energy cost ( less than 35J/kg) ，we have studied and discussed the influence of two-phase flow physical properties ( such as flowrate ratio，surface intension and capillary number) on the emulsion polydispersity experimentally and numerically． Capillary number ( Ca) plays an important role in emulsification progress，and when Ca is less than 0. 01， the mono-disperse emulsion is better． As the surface tension of the two-phase flow increases， the emulsion poly-dispersity is lower and the density of the emulsion reduces． When the surface tension rises to 27. 6mN/m， the polydispersity ( Pw) ranging from 3. 0% to 5. 8% is half of the Pw of water -0. 3% span83 emulsions．

Key words: novel parallel multiscale channels, emulsification, poly-dispersity, physical properties 

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