摘要
应用脉冲放电等离子体技术 ,在线板式反应器内对低浓度甲苯废气的治理进行放大试验 .采用闸流管开关脉冲电源 ,其最大输出功率 1kW ,最大脉冲电压峰值 10 0kV .试验规模 4～ 16m3 ·h-1.试验考察了峰值电压、重复频率、进口浓度和处理气量对甲苯去除率的影响 .结果表明 :峰值电场强度在 9～ 12kV·cm-1范围内增加 ,甲苯去除率相应明显提高 ;当处理气量为 4m3 ·h-1、脉冲电压峰值 6 9kV、进口浓度 1180mg·m-3 、重复频率 30 0 pps时 ,甲苯的去除率可达 88% ;反应器的能量利用率在16 g·(kW·h) -1左右 ;甲苯的降解产物主要是CO2 和H2 O ,还有少量CO .结合甲苯去除率与能量密度、甲苯进口浓度的关系 ,建立反应器动力学模型 ,获得甲苯的反应速率常数为 0 0 0 35 6L·J-1.为进一步优化放大反应器设计及与电源匹配提供了基础数据 .
The scale-up experiments of the decomposition of toluene by pulse corona discharge in wire-plate reactor were investigated. The maximum output power of pulse voltage source was 1kW, and the maximal peak voltage was 100kV. The experiments were conducted with a gas-flow rate of 4～16 m3·h -1. Different parameters which influenced on removal efficiency were investigated, such as peak voltage, pulse frequency, inlet concentration of toluene, gas-flow rate. The results showed that the removal efficiency was improved obviously when the peak field intensity was changed in the range of 9～12 kV·cm -1; the removal efficiency 88% was obtained when gas-flow rate, peak voltage, inlet concentration of toluene, pulse frequency were 4 m3·h -1, 69kV, 1180 mg·m -3, 300pps respectively. The energy yield of toluene was about 16g·(kW·h) -1; the main products of decomposition were CO 2 and H 2O, few of CO. Combining the removal efficiency of toluene with energy density and inlet concentration of toluene, a reaction kinetic mathematic model was developed. By this model, the decomposition rate constant of toluene was 0.00356 L·J -1. According to the results, the optimization design for the reactor and the matching of pulse voltage source were reckoned.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第3期30-34,共5页
Environmental Science
基金
杭州市"5 112"工程专项基金
