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

• Efficiency of electron beam dry scrubbing method as applied to PCDD/Fs was estimated.
• Decomposition of PCDD/Fs is the main channel of their transformation under EB irradiation.
• Production of PCDD/Fs at low concentrations of chlorinated phenols is insignificant.
• Further experiments are required to clarify mechanisms of PCDD/Fs transformation.

The efficiency of the electron beam treatment of industrial flue gases for the removal of sulfur and nitrogen oxides was investigated as applied to polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) using methods of mathematical modeling. The proposed kinetic model of the process includes mechanism of PCDD/Fs decomposition caused by their interaction with OH radicals generated in the flue gases under the electron beam (EB) irradiation as well as PCDD/Fs formation from unburned aromatic compounds. The model allows to predict the main features of the process, which are observed in pilot plant installations, as well as to evaluate the process efficiency. The results of calculations are compared with the available experimental data.