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Mass Transfer in a Flat Gas/Liquid Interface using non‐Newtonian Media
Author(s) -
GómezDíaz D.,
Navaza J.M.
Publication year - 2003
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200301688
Subject(s) - mass transfer , carboxymethyl cellulose , polymer , rheology , viscosity , volumetric flow rate , chemistry , newtonian fluid , non newtonian fluid , aqueous solution , contactor , thermodynamics , mass transfer coefficient , materials science , chemical engineering , chromatography , sodium , organic chemistry , composite material , power (physics) , physics , engineering
Gas/liquid mass transfer has been investigated using a stirred vessel gas/liquid contactor using non‐Newtonian media and carbon dioxide as absorbent and gas phase, respectively. The volumetric mass transfer coefficients at different operational variables have been determined. Non‐Newtonian media (liquid phase) were prepared as aqueous solutions of sodium carboxymethyl cellulose salt. The influence of the rheological properties, polymer concentration, stirring rate, and gas flow rate on mass transfer was studied for these liquid phases. Kinematic viscosity and density experimental data were used to calculate the average molecular weight corresponding to the polymer employed. The Ostwald model has been used to fit the rheological behavior of aqueous solutions of the polymer employed as absorbent phase. Reasonably good agreement was found between the predictions of the proposed models and the experimental data of mass transfer coefficients.