To study decomposition of formaldehyde with high-requency dielectric barrier discharge

the influence of parameters of DBD reactor structure on decomposition of formaldehyde is investigated

and the removal mechanism of formaldehyde by the low temperature plasma from DBD is analyzed.The experimental results show that the central electrode diameter and the internal diameter of dielectric tube significantly influence the decomposition efficiency of formaldehyde.Both diameters ought to be optimized to maximize the decomposition efficiency.As a discharge electrode of the reactor

tungsten filament is better than brass wire and stainless steel wire.Adopting 99 ceramic tubes with higher relative dielectric constant as dielectric barrier

the decomposition efficiency of formaldehyde is increased from 41% to 76%.The reaction length has an optimum value when power is fixed.