Mass transfer from the rotor to the stator for improving the speed of the piezoelectric motor based on centrifugal force

2021 ◽  
Vol 92 (5) ◽  
pp. 055008
Author(s):  
Qiaosheng Pan ◽  
Ziliang Huang ◽  
Quan Wang ◽  
Kai Wu ◽  
Shanlin Liu ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Centrifugal Force ◽  
Piezoelectric Motor

Process Intensification of Liquid-Liquid Extraction in Rotating Packed Bed

2020 ◽  
Vol 998 ◽  
pp. 146-150
Author(s):  
Sudhanya Karmakar ◽  
Avijit Bhowal ◽  
Papita Das
Keyword(s):  
Mass Transfer ◽  
Centrifugal Force ◽  
Separation Efficiency ◽  
Process Intensification ◽  
Packed Bed ◽  
Liquid Extraction ◽  
Aliquat 336 ◽  
Terrestrial Gravity ◽  
Liquid Liquid Extraction ◽  
Rotating Packed Bed

The object of this study is to intensify the liquid-liquid extraction. Experiments were carried out inside a Rotating Packed Bed (RPB) operating at centrifugal force varying between 100g and 1000g. The system chosen for experimentation was removal of hexavalent chromium from aqueous solution using aliquat-336 as an extractant. The effect of centrifugal force on overall volumetric mass transfer coefficient () was investigated. Mass transfer characteristics of RPB were observed with the variation in rotational speed (300-1100rpm), aqueous phase (0.4-1.2 L/min) and organic phase (0.05-0.15 L/min) flow rate, feed (25-200 mg/L) and extractant (0.5-1.25 vol%) concentration. Significantly higher value of (~20-25 times) was achieved in RPB than that achieved in comparison with conventional packed bed extractor wherein flow is dictated by terrestrial gravity. In other words, same separation efficiency can be obtained within a much smaller rotating extractor.

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