This study aimed to discuss the removal of hydrogen sulfide （H2S） with non-thermal plasma produced by a multilayer tubular dielectric barrier discharge reactor,which is useful in the field of plasma environmental ap...This study aimed to discuss the removal of hydrogen sulfide （H2S） with non-thermal plasma produced by a multilayer tubular dielectric barrier discharge reactor,which is useful in the field of plasma environmental applications.We explored the influence of various factors upon H2S removal efficiency （ηH2S） and energy yield （Ey）,such as specific energy density （SED）,initial concentration,gas flow velocity and the reactor configuration.The study showed that we can achieve ηH2S of 91% and the best Ey of 3100 mg kWh-1 when we set the SED,gas flow velocity,initial H2S concentration and layers of quartz tubes at 33.2 J 1-1,8.0 m s-1,30 mg m-3 and five layers,correspondingly.The average rate constant for the decomposition of hydrogen sulfide was 0.206 g m-3 s-1.In addition,we also presented the optimized working conditions,byproduct analysis and decomposition mechanism.展开更多
Wastewater from the spray absorption treatment of sludge drying gas is a kind of refractory wastewater with poor biodegradability.In this study,the free radicals generated from the double dielectric barrier were innov...Wastewater from the spray absorption treatment of sludge drying gas is a kind of refractory wastewater with poor biodegradability.In this study,the free radicals generated from the double dielectric barrier were innovatively used for the degradation of simulated spray wastewater.The effects of residence time,input power,initial pH,aeration rate,and discharge area on the degradation rate and COD(chemical oxygen demand)removal rate were investigated.The optimal conditions were as follows:residence time=120 min,input power=170.0 W,initial pH=5.54,aeration rate=0.9 mL/min,discharge area=10.8 cm^(2),and the initial concentrations of NH_(3),H_(2)S,methanethiol,trimethylamine,benzene and toluene were 250,250,50,50,50 and 100 mg/L,respectively.Meanwhile,it was also found that hydroxyl radical(⋅OH)played an important role in the degradation process.展开更多
基金Supported by programs of Research on the Technology and Equipment of Gaseous Pollutant Removal from the Emission of Household Garbage(15DZ12055904)Jointly Decomposition of Odorous Compounds by Dielectric Combined with Excimer Ultraviolet Emission(21577023)
文摘This study aimed to discuss the removal of hydrogen sulfide （H2S） with non-thermal plasma produced by a multilayer tubular dielectric barrier discharge reactor,which is useful in the field of plasma environmental applications.We explored the influence of various factors upon H2S removal efficiency （ηH2S） and energy yield （Ey）,such as specific energy density （SED）,initial concentration,gas flow velocity and the reactor configuration.The study showed that we can achieve ηH2S of 91% and the best Ey of 3100 mg kWh-1 when we set the SED,gas flow velocity,initial H2S concentration and layers of quartz tubes at 33.2 J 1-1,8.0 m s-1,30 mg m-3 and five layers,correspondingly.The average rate constant for the decomposition of hydrogen sulfide was 0.206 g m-3 s-1.In addition,we also presented the optimized working conditions,byproduct analysis and decomposition mechanism.
基金supported by the National Natural Science Foundation of China(No.61871409)Zhejiang Natural Science Foundation of China(No.LZ20F010001).
文摘Wastewater from the spray absorption treatment of sludge drying gas is a kind of refractory wastewater with poor biodegradability.In this study,the free radicals generated from the double dielectric barrier were innovatively used for the degradation of simulated spray wastewater.The effects of residence time,input power,initial pH,aeration rate,and discharge area on the degradation rate and COD(chemical oxygen demand)removal rate were investigated.The optimal conditions were as follows:residence time=120 min,input power=170.0 W,initial pH=5.54,aeration rate=0.9 mL/min,discharge area=10.8 cm^(2),and the initial concentrations of NH_(3),H_(2)S,methanethiol,trimethylamine,benzene and toluene were 250,250,50,50,50 and 100 mg/L,respectively.Meanwhile,it was also found that hydroxyl radical(⋅OH)played an important role in the degradation process.
