介质阻挡放电诱发185nm紫外光协同降解甲苯  被引量:2

Degradation of toluene using dielectric barrier discharge combined with 185 nm UV light technique

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作  者:杨喆[1] 陆军[2] 陈殿军[1] 李云霞[1] 朱承驻[1] 

机构地区:[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]合肥工业大学分析测试中心,安徽合肥230009

出  处:《合肥工业大学学报(自然科学版)》2017年第2期248-253,共6页Journal of Hefei University of Technology:Natural Science

基  金:教育部留学回国人员科研启动基金资助项目(2012JYLH0426)

摘  要:文章采用介质阻挡放电(dielectric barrier discharge,DBD)诱发185nm紫外光解(CDBDP)技术降解甲苯废气,考察了初始质量浓度、电源输入功率、气体流量及相对湿度对甲苯降解效果的影响,对降解产物进行了傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FTIR)和气相色谱-质谱(gas chromatography-mass spectrometer,GC-MS)分析。结果表明:DBD诱发185nm紫外光比单纯DBD处理甲苯的降解率提高了20%,能量效率增加了0.81g/(kW·h);甲苯的降解率随相对湿度的增加先增大,再逐渐减小;在甲苯初始质量浓度400mg/m^3、相对湿度65%及气体流量0.3m^3/h的条件下,分别采用单纯紫外光(ultraviolet,UV)(功率8 W)、单纯DBD(功率103.5 W)及CDBDP协同方法时,甲苯的降解率依次为18.98%、62.18%及84.80%。The removal of toluene via dielectric barrier discharge(DBD) combined with 185 nm ultraviolet(UV) light(CDBDP) was investigated. Some parameters such as the toluene initial concentration, input power, gas flow rate and relative humidity(RH) which influenced the removal efficiency were studied and the products were analyzed by Fourier transform infrared spectroscopy(FTIR) and gas chromatography-mass spectrometer (GC-MS). The results showed th at DBD combined with 185 nm UV light could improve the toluene removal efficiency by about 20% and increased the energy yield by 0. 81 g/(kW·h) as compared to bare DBD treat- ment. The removal efficiency first increased with the increase of RH and then decreased gradually. When the toluene initial concentration was 400 mg/m^3, RH was 65%, gas flow rate was 0. 3 m3/h, and the input pow- er was 103. 5 W in CDBDP/DBD system and 8 W in UV system, the toluene removal efficiency was 84. 80%, 62. 18% and 18. 98%, respectively.

关 键 词:介质阻挡放电(DBD) 紫外光 甲苯 降解率 

分 类 号:X512[环境科学与工程—环境工程]

 

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