| 液相脉冲高压放电催化降解二甲基亚砜的研究 |
| 摘要点击 1693 全文点击 1625 投稿时间：2009-03-26 修订日期：2009-05-13 |
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| 中文关键词 液相脉冲高压放电 Fenton 二甲基亚砜 DMSO 催化 |
| 英文关键词 liquid-phase pulsed high voltage discharge Fenton dimethyl sulfoxide(DMSO) catalysis |
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| 中文摘要 |
| 研究了液相脉冲高压放电Fenton催化对二甲基亚砜(dimethyl sulfoxide，DMSO)的降解．自制了脉冲上升前沿400 ns、放电重复率96.2 Hz、峰值电压20 kV的脉冲高压系统，它驱动液相高压放电发生．对脉冲高压电极侧壁做了绝缘以考察新型电极对单脉冲功率的影响．溶液电导率对液相高压放电H2O2产率和DMSO降解的影响及Fe(Ⅱ)和O2流量对液相高压放电DMSO降解的影响进行了考察，对液相高压放电Fenton催化降解DM |
| 英文摘要 |
| Fenton catalytic degradation of dimethyl sulfoxide (DMSO) by using liquid-phase pulsed high voltage discharge was carried out．The discharge was driven by a self-made pulsed power supply providing a pulse rising time of 400 ns，discharge repetition rate of 96.2 Hz，peak voltage of 20 kV．The side surface of discharge electrode was insulated in order to limit the discharge current，followed by estimating its effect on single pulse power．The effects of aqueous conductivity，Fe(Ⅱ)，and O2flow rate on liquid-phase discharge induced DMSO degradation and aqueous conductivity on corresponding H2O2 yield were investigated．The concentrations and selectivities of intermediates of DMSO degradation，were also studied．The results indicated that when using the insulated electrode,single pulse power had a limiting value with increasing the aqueous conductivity；DMSO degradation rate was reduced with increasing the aqueous conductivity and O2 flow rate，whereas Fe(Ⅱ) showed a Fenton catalytic oxidation of DMSO；80% of DMSO degradation rate was achieved at the pulsed high voltage discharge time of 45 min and the resultant biodegradability was enhanced by at least 32%-48%；the maximum energy efficiency in G37% was 0.008 7 mol/(kW·h)．The study suggested that the liquid-phase plasma combined catalyst promised the potential of organic compound degradation. |
