The decomposition of hydrogen peroxide - A non-linear dynamic model

All thermal systems are subject to problems of thermal regulation. These ca n be understood through the use of thermochemical systems, in particular fo r those in the liquid phase. A dynamic linear model was earlier applied to obtain both the reaction enthalpy and the rate constant at constant tempera ture for the catalytic decomposition of hydrogen peroxide. This first model did not yield a good fitting between the calculated and experimental data. The hypothesis that the rate constant was independent of temperature was t oo strong. In the present study, a more elaborate, non-linear model was developed, whi ch takes into account the rate constant variations as a function of tempera ture (Arrhenius law). This model allowed the activation energy to be determ ined. The calculated data then successfully fitted the experimental data. T he literature indicates that the first-order rate law is not valid for a ce rtain range of concentrations; the present model verified this. The results of dynamic modelling confirm and increase the precision of resu lts obtained in different ways. The developed model is validated through th ese comparisons.