Intrinsic kinetics of the oxidative reaction of dichloroacetic acid employing hydrogen peroxide and ultraviolet radiation

ZALAZAR, C.S.; LOVATO, M.E.; LABAS, M.D.; BRANDI, R.J.; CASSANO, A.E.

CHEMICAL ENGINEERING JOURNAL

Año: 2006

1385-8947

In a previous work it has been shown that the combination of H2O2 and low wavelength UV radiation is a suitable process for degrading dichloroacetic acid (DCA). The finalresult provided a validated, complete reaction scheme. That proposal included the two possible ways that the hydroxyl radical can react with DCA [Zalazar et al., (2007)]. This work was directed to a single objective: to derive, from the previous reaction sequence, a mathematical model able to represent the kinetics of DCA oxidation and validate its predictive quality with experiments. This representation of the reaction must include all the required variables for an ulterior reactor design and scale-up and, consequently, the kinetic model must be independent of the shape, size and configuration of the laboratory reactor. Working with a complete set of experimental runs that included all the involved variables, the kinetics parameters of the DCA degradation were obtained by comparing predicted concentrations by the model with the experimental values, employing a multiparameter non-linear regression analysis.