【摘要】 采用介质阻挡放电(DBD)降解模拟乙酸异丁酯(IA)气体,结果表明:当ρ(IA)为1 788 mg/m3,气体流速为1.8 m/s,外施电压为9.0 kV时,IA去除率达75.3%.外施电压升高,初始ρ(IA)和气体流速下降,IA去除率升高.放电间隙对DBD降解IA废气也会产生一定的影响.能率与气体流速无线性关系,为了得到较高的能率,外施电压应调节至7.5和9.0 kV.考察了DBD降解实际IA工业废气的效果、费用和可行性,结果表明:废气量为2 000 m3/h,DBD反应管中的气体流速为5.4 m/s,单个DBD电源输入电压为16 kV时,IA去除率达80%以上,单位体积IA废气的处理费用为0.012元/m3.对DBD降解IA的产物进行了分析,并初步探讨了降解机理.更多还原

【Abstract】 Removal of simulated isobutyl acetate(IA) gas was investigated via dielectric barrier discharge(DBD) technology.The results showed that when the gas flow rate was 1.8 m /s and the initial IA mass concentration was 1788 mg /m3,the removal efficiency of IA reached 75.3% at 9.0 kV of applied voltage.The removal efficiency of IA increased with increasing applied voltage and decreasing initial concentration and gas flow rate.The discharge gap could also influence the IA waste gas removal efficiency via DBD technology.The energy yield had a non-linear correlation with gas flow rate.To obtain high energy yield,applied voltage should be controlled at 7.5 and 9.0 kV.We also investigated the removal efficiency,treatment cost and feasibility of decomposition of actual industrial waste gas containing IA.The results showed that removal efficiency of IA was above 80% when applied voltage,gas flux,and gas flow rate in the DBD reactor region were set at 16 kV,2000 m3 /h,and 5.4 m /s,respectively.The treatment cost of IA was approximately 0.012 yuan /m3.Lastly,the likely reaction pathways for the removal of IA by DBD were discussed on the basis of byproducts analysis.更多还原