Abstract:

This paper deals with the energy consumptions for the formaldehyde discharge （DBD） plasma reactors respectively with tube and flat pIate types. It degradation in two dielectric barrier aims to reveal the influences of discharging voltage, initial formaldehyde mass concentration and residence time on the degradation rate of formaldehyde. Experimental results indicate that （1） the energy consumption in the fiat-plate reactor （12. 8Woh/m³） is far below that of the tube reactor （55.0 Woh/m³ ） ; （2） the degradation rates of formaldehyde in both the tube and the flat-plate reactors greatly increase with the discharging voltage, then the increase degrees become low at the voltages of 11 kV and 18 kV, respectively ; concentration and then decreases, and （3） the degradation rate at first increases with the initial formaldehyde mass but it continuously increases with the extension of the resistance time.

Key words: dielectric barrier discharge, plasma, formaldehyde, degradation rate, energy consumption