Investigation of Factors Influencing Nox Remediation by High Frequency Dielectric Barrier Discharge Plasma

摘要

In this work, plasma was produced by high frequency dielectric barrier discharge. Using this method, the frequency can arrive at more than 30000 Hz. The characteristics of this kind of discharge was considered, with particular reference to the influence factors of Nox remediation by high frequency DBD plasma, including the input energy cost, the diameter of central electrode, the diameter of barrier medium and the concentration of O_2, NO or C_3H_6 in the feed gas. The results show that NQx removal rate increases with the increasing of input electric energy. The NO conversion to N_2 can arrive at more than 20% when the energy cost is less than 100 J·L~(-1) and can arrive at more than 90% when increasing the energy cost furthermore. Both diameters of electrode and barrier medium have ignorable effect on Nox removal. There is an optimal O_2 concentration NQx removal. Higher NO concentration results in lower Nox conversion to N_2 but increased C_3H_6 concentration produces higher Nox removal rate.