KINETICS OF HYDROGEN-PEROXIDE CHLORATE REACTION IN THE FORMATION OF CHLORINE DIOXIDE

This paper reports and discusses an experimental program that investig ates chlorine dioxide formation by reduction of sodium chlorate with h ydrogen peroxide in aqueous sulfuric acid. The rate of reaction was st udied in both batch and well-mixed reactors over ranges of temperature and reactant concentrations which bracket conditions of commercial in terest. The rate data were correlated by a power law model in which an acidity function H- was used to characterize the acidity of sulfuric acid. The acidity function takes into account the large influence on t he acidity of sulfuric acid exhibited by both byproduct sodium sulfate and sodium ions associated with sodium chlorate. The rate model reaso nably predicted transient chlorine dioxide production rate data gather ed in a commercial plant trial. The rate model should provide a useful tool for design.