Parameter optimization of excited OH radical in multi-needle to plate negative DC corona discharge

Enhanced removal of benzene in non-thermal plasma with ozonation, flow recycling, and flow recirculation

“…For the next step, water vapor added to the N 2 stream to enhance the influence of OH, and O radicals. As it was reported, OH radicals are increased by rising RH up to 60% [50], therefore, RH of N 2 stream was elevated from 20% to 60%. Following reaction could occur in the presence of water vapor during dissociative electron attachments and when collision frequency is increased between energetic electrons and water molecules [7,21,51].…”

Removal of low-concentration benzene in indoor air with plasma-MnO 2 catalysis system

“…The influence of discharge power on benzene removal efficiency is likely attributed to the influences of applied voltage and current. The electric field intensity increased with applied voltage, resulting in the greater mean kinetic energy of energetic electron and then increased active species production [20]. Consequently, the collision probability between energetic electrons and benzene molecules also increased.…”

“…On the other hand, more electrons will be absorbed by increased H 2 O molecules due to its electronegativity. This will lead to the reduction of mean density of energetic electrons, and reduction of production of OH and O radicals [20].…”