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The effect of mass transfer on apparent ascorbic acid autoxidation kinetics
Author(s) -
Davidson Robert S.,
GriegerBlock Richard A.
Publication year - 1977
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690230418
Subject(s) - autoxidation , ascorbic acid , chemistry , mass transfer , copper , kinetics , oxygen , mass transfer coefficient , zero order , first order , inorganic chemistry , chromatography , organic chemistry , physics , food science , mathematics , quantum mechanics
Previous studies of copper‐ion catalyzed ascorbic acid autoxidation have indicated zero‐order, first‐order, or Michaelis‐Menten dependence of rate on ascorbic acid or copper concentrations and first‐ or half‐order dependence on oxygen concentration. A simple mathematical model of gas‐liquid mass transfer with liquid phase reaction accounts for the various behaviors. Use of an experimental technique that eliminates the mass transfer step shows that the oxidation rate dependence is first order in copper, half order in oxygen, and Michaelis‐Menten in ascorbic acid concentrations.