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Mass transfer and holdup in gas‐liquid cocurrent flow packed beds containing water‐repellent particles
Author(s) -
Goto Shigeo,
Saikawa Keichiro,
Gaspillo P. D.
Publication year - 1991
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450690615
Subject(s) - mass transfer , volume (thermodynamics) , desorption , mass transfer coefficient , liquid flow , polytetrafluoroethylene , volumetric flow rate , chemistry , packed bed , chromatography , materials science , activated carbon , chemical engineering , analytical chemistry (journal) , composite material , thermodynamics , mechanics , adsorption , organic chemistry , physics , engineering
Water‐repellent particles were prepared by spraying polytetrafluoroethylene (PTFE) on activated carbon. Gas‐liquid volumetric mass transfer coefficient and holdup were determined in gas‐liquid cocurrent upflow and downflow packed beds from the measurements of gas desorption and volume, respectively. As the PTFE loading increased, the gas‐liquid volumetric mass transfer coefficients in both upflow and downflow modes were enhanced. Gas holdup in the upflow mode increased with the PTFE loading, while the dynamic liquid holdup in the downflow mode decreased. The enhancement of the mass transfer rate from gas to liquid can be explained by the effect of water‐repellency on the surface of activated carbon.