Experimental Study On The Effect Of Discharge Power On Dielectric Barrier Discharge Characteristics And Indoor Air Purification Efficiency

In recent years,air pollution control has received increasingly interest in research communities,especially in indoor environments such as rooms,offices,vehicles,et al.Among several purification methods,the application of non-thermal plasma is the most attractive.In this paper,the principle of non-thermal plasma and its mechanism of action in air purification are introduced briefly,and several methods for non-thermal generation are compared.Generally,non-thermal plasma could be classified by characteristics into several styles,such as arc discharge,corona discharge,dielectric barrier discharge?DBD?,and so on.As far as DBD is concerned,it's considered to be the central style for non-thermal production at atmospheric pressure.Also,the filamentary mode,pattern discharge mode,and glow discharge mode of DBD are compared,too.This paper concentrates on SO₂ removal in indoor air by DBD,of which the multi-needle to plane electrodes are adopted,and the discharge mode is filamentary.With the pulse power supply of nanosecond forefront,the effect of different peak voltage value and space between nearby needles on SO₂ gas purification efficiency is studied experimentally.It conclude both by theoretical analysis and experimental result that there is a best needle space for most energy density input and the highest SO₂ gas purification efficiency.With the high-voltage and high-frequency sine power supply,the effect of different frequency and voltage amplitude on SO₂ gas purification efficiency is studied experimentally.With relevant theoretical and experimental data,it conclud that there is a best needle space for energy density input and highest SO₂ gas purification efficiency.