Effects of removing carbon particles of different size with nonthermal plasma generated by packed-bed dielectric barrier discharge reactor

Abstract

A self-designed packed-bed dielectric barrier discharge (PB-DBD) reactor was used to explore the effects of carbon particle size distribution, reaction chamber temperature and reactor inlet flow on the removal effect of carbon particles with different particle sizes. The results indicated that in the process of non-thermal plasma (NTP) oxidation of carbon particles, particles with larger particle size are decomposed into new nanoparticles. When the temperature of the reaction chamber increased from 25 to 200 ℃, the number concentration removal efficiency and rate of nanoparticles, ultrafine particles and total particles increased. With the increase of the inlet flow of the reactor, the O3 concentration first increased and then decreased and the number concentration removal rate of nanoparticles, ultrafine particles and total particles showed the same trend as the O3 concentration. At the inlet oxygen flow of 3 L/min, the O3 concentration and carbon particle removal rate were the maximum.