Kinetics of Anodic Oxidation of Sodium Gluconate by Using Graphite Electrode
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The kinetics of anodic oxidation of sodium gluconate was studied. The reciprocal of apparent current shows the reciprocal dependence on the concentration of sodium gluconate. The kinetic model correlated well with the experimental results. The rate determining step was found to be the anodic oxidation of gluconate anion to form gluconate free radical. The current of the anodic oxidation of sodium gluconate can be expressed as<BR><BR><I>i</I> = 0.89[NaC<SUB>6</SUB>H<SUB>11</SUB>O<SUB>7</SUB>]/(0.7357 + [NaC<SUB>6</SUB>H<SUB>11</SUB>O<SUB>7</SUB>])*exp(0.37<I>Fη</I><SUB>2</SUB>/<I>RT</I>)<BR><BR>where <I>F</I> is Faraday's constant and <I>η</I><SUB>2</SUB> is the overpotantial of forming gluconate free radical from gluconate anion.
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 41(2), 84-89, 2008-02-01
The Society of Chemical Engineers, Japan