Studies on a non-thermal pulsed corona plasma between two parallel-plate electrodes in water
Studies on a non-thermal pulsed corona plasma between two parallel-plate electrodes in water
复制标题
DOI：
10.1088/0022-3727/45/22/225203
复制
发表时间：
2012-06-06
影响因子：
3.4
通讯作者：
Schmidt, T. C.
中科院分区：
文献类型：
--
作者：
Sein, M. M.;Bin Nasir, Z.;Schmidt, T. C.
本文研究了水中两平行平板电极间产生的低温等离子体。其中一个不锈钢电极(阴极)的表面涂覆了一层氧化铝陶瓷层。该反应池连接到水循环，在闭合循环中进行放电，因此在放电过程中建立了平衡。研究了脉冲重复频率、溶液电导率和溶液pH值对过氧化氢生成最重要的氧化物种·OH自由基的影响。在电导率为400亩S厘米(-1)、pH为7的氯化钠溶液中，20pps的反应时间90min，H_2O_2的产率最高(3.5mgH2O~(-1))。最大能量效率接近0.1gkWh(-1)H_2O_2。用扫描电子显微镜对涂敷电极施加电场前后的表面进行了分析。在放电过程中，涂层被破坏，放电近35h后，过氧化氢的生成量降至10%。
A non-thermal plasma generated between two parallel-plate electrodes submerged in water was studied in this work. The surface of one of the stainless-steel electrodes (the cathode) was coated with a ceramic layer of Al2O3. This reactor cell was connected to a water cycle and the discharge was carried out in a closed loop and therefore an equilibrium was established during discharge. The dependence of hydrogen peroxide formation as an indicator for the generation of most important oxidative species OH radicals on the pulse repetition rate, the solution conductivity and the pH of the solution was investigated. The highest yield of H2O2 (3.5 mg L-1) was obtained at 20 pps in a NaCl solution with a conductivity of 400 mu S cm(-1) and pH 7 in 90 min. The maximum energy efficiency of similar to 0.1 g kWh(-1) H2O2 was obtained. The surface of the coated electrodes, before and after applying of electrical discharges, was analysed by scanning electron microscopy. During the discharge process, the coating was destroyed and the formation of H2O2 decreased to 10% after discharging of nearly 35 h.