Experiments and modelling VOCs' removal in a DBD reactor
Résumé
Dielectric Barrier Discharges are commonly studied to remove Volatile Organic Compounds diluted in air at atmospheric pressure. Previously, we presented that a DBD heated up to 800 K lead to a high conversion rate at a total energy density lower than one at 300 K. Important effects of both temperature and energy density on produced species (nature and concentration) were observed. In this paper, we show that the discharge chemical effects can be described as chemical kinetics at 800 K. Streamer effects can be modeled as O-atoms generators. The DBD reactor is modeled by a successive elementary Plug Flow Reactors (PFR) distributed throughout the discharge tube. To simulate atomic oxygen production in streamers, O-atoms are injected at the inlet of each PFR. A combustion model is used to simulate the chemical kinetics. Taking into account both energy density and the PFR number a fitting variable, Fv, is introduced to fit the experimental results and data modelling.