Ozonization of ethanolamine in aqueous medium

The destruction of ethanolamine by ozonation in aqueous medium was studied. The effectiveness of ozonation was estimated by the degree of conversion α [%], and by the rate constant, k [min−1], which was calculated from a first-order kinetic equation. The activation energy of the process was calculated from the rate constant vs temperature relationship according to the Arrhenius equation. The effect of pH of the medium and temperature, T, on the effectiveness of ozonation was investigated. It was established that ozonation of ethanolamine is most effective at T=283 K and pH=11.0. Under these conditions the rate constant has its high value 0.118 min−1. At pH=11.0 the effect of the temperature on the rate constant is stronger which can be explained with the high value of the activation energy of the process. The amount of the residual ozone in gaseous phase was determined and the possibility of its decomposition on a catalyst of higher nickel oxide was studied. The effect of the amount of catalyst on the decomposition of the residual ozone was examined. The quantity of the catalyst needed for the complete decomposition of the residual gaseous ozone was estimated by the achieved degree of conversion of residual ozone α=100%.