Kinetic Mechanisms of Electron-Beam Induced Polycyclic Aromatic Hydrocarbons Transformation in Flue Gases

Abstract

The effect of non-thermal plasma generated by electron-beam on the behavior of polycyclic aromatic hydrocarbons (PAHs) in industrial flue gases was investigated using methods of mathematical modeling. The proposed kinetic model of the process includes mechanism of PAHs conversion caused by their interaction with OH-radicals, ion-molecular mechanism of PAHs decomposition, and ion-molecular mechanism of higher-ringed PAHs formation. The model allows to predict the main features of the process, which are observed in pilot plant installations, and to give quantitative estimations of the process efficiency. The results of calculations are compared with the available experimental data.

Modeling study of polychlorinated dibenzo-p-dioxins and dibenzofurans behavior in flue gases under electron beam irradiation

“…The sufficiently good agreement of calculated and measured data suggests that the adopted kinetic model of the EBDS process (Gerasimov, 2015) and kinetic mechanism of PCDD/Fs decomposition based on the primary attack of the PCDD/Fs molecules by OH radicals give adequate description of these compounds behavior under the EB irradiation. The principal role in consumption of OH radicals during the EBDS process belongs to main pollutants of the MSWI flue gases such as sulfur and nitrogen oxides.…”

“…The details of the mathematical model, which was used in this study for description of the EB induced PCDD/Fs transformation in the MSWI flue gases, are given earlier (Gerasimov et al, 1996;Gerasimov, 2015). The computational procedure is based on the widely used CHEMKIN code (Kee et al, 1996) that was modified to include equilibrium and liquid phase reactions associated with SO 2 oxidation in droplets.…”