مشخصات پژوهش

Background: Spent caustic contains noxious components such as sulfide species and also high chemical oxygen demand content. Oxidation of these materials to caustic and sulfate species are mostly the rate controlling step within catalytic oxidation of spent caustic. Methods: In this study, the kinetic of catalytic oxidation of spent caustic and the regeneration methodology of the sulfidic spent caustic was investigated. The kinetics of catalytic oxidation of spent caustic was studied in the presence of a heterogeneous catalyst. The developed mathematical model was verified via the batch bubble column reactor. The elementary and non-elementary models based on genetic algorithm had been used to obtain the rate coefficient and kinetic order. Results: The experiments were carried out at various conditions. The results indicate that the error of objective function of the non-elementary and elementary models are 3.01% and 134.96%, respectively. Conclusion: The obtained results were illustrated which the non-elementary model has rational outcome comparison to the elementary model, also the results show that non-elemental modeling is more concordance with experimental results.