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Gas—liauid mass transfer in three‐phase stirred tank reagors: Newtonian and non‐newtonian fluids
Author(s) -
Rawase Yoshlnori,
Araki Takae,
Shimzu Kazuhiro,
Miura Hideki
Publication year - 1997
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.5450750621
Subject(s) - mass transfer , carboxymethyl cellulose , impeller , newtonian fluid , non newtonian fluid , mass transfer coefficient , thermodynamics , phase (matter) , materials science , chemistry , analytical chemistry (journal) , chromatography , mechanics , physics , organic chemistry , sodium
Gas—liquid mass transfer has been investigated in gas—liquid‐solid three‐phase stirred tank reactors with Newtonian and non‐Newtonian liquids. Volumetric mass transfer coefficients and gas hold‐ups were measured in a 0.2 m i.d. stirred tank reactor and the effects of low‐density polymeric particles (ρ s , =1030 and 1200 kg/m 3 ; up to 15 vol%) on gas—liquid mass transfer were examined. The volumetric mass transfer coefficients in water were found to decrease due to the presence of solid particles at constant impeller speed and superficial gas velocity. On the other hand, solids loading led to higher mass transfer rates in non‐Newtonian carboxymethyl cellulose aqueous solutions. Our previously proposed model for mass transfer in gas—liquid two‐phase systems was extended to gas—liquid—solid three‐phase systems. Reasonable agreement was found between the predictions of the proposed model and the experimental data.