DBD等离子体协同催化降解甲醛气体及光谱诊断研究

DBD plasma co-catalytic degradation of formaldehyde gas and spectral diagnosis

采用介质阻挡放电(DBD)等离子体协同催化降解甲醛气体,考察了放电功率、初始质量浓度、气体流量对甲醛的降解效率、能量效率和生成的臭氧(O_(3))质量浓度的影响。结果表明,在初始质量浓度为41.12 mg/m^(3)、气体体积流量为0.7 L/min、放电功率为30 W的最佳反应条件下加入Mn-TiO_(2)/γ-Al_(2)O_(3)催化剂后,甲醛的降解效率和反应器的能量效率分别高达90.71%和0.052 g/(kW·h),O_(3)质量浓度下降至121.957 mg/m^(3)。

Dielectric barrier discharge(DBD)plasma is used to co-catalyze the degradation of formaldehyde gas,and the effects of reaction conditions on the degradation efficiency of formaldehyde,the energy efficiency of reactor and the mass concentration of ozone formed are analyzed.The optimal reaction conditions are determined as follows:the initial concentration is 41.12 mg·m^(-3),the gas volume flow is 0.7 L·min^(-1),and the discharge power is 30 W.Under these conditions and over Mn-TiO_(2)/γ-Al_(2)O_(3) catalyst,the degradation efficiency of formaldehyde reaches as high as 90.71%,the energy efficiency of the reactor reaches 0.052 g·(kW·h)^(-1),while the mass concentration of O_(3) generated drops to 121.957 mg·m^(-3).