气液两相高压脉冲放电生成过氧化氢的研究

Study of Generating Hydrogen Peroxide Using Gas-Liquid Two-Phase High-Voltage Pulse Discharge

摘要: 高压脉冲放电是一种新型的高级氧化技术，放电过程中能产生多种活性自由基，如•OH，•O，•H，•HO₂，O₃，H₂O₂等。这些活性物质可以杀灭压载水中的藻类、病原体、细菌、浮游植物等。H₂O₂是这些活性物质中寿命较长的，其氧化还原电位为1.77 V，其氧化还原能力仅次于F₂ (2.87 V)、•OH (2.80 V)，可以直接和污染物及菌类反应，以达到降解污染物或者灭菌的目的。本文用实验室自制的单针–板式反应器，研究了气液两相脉冲放电过程的脉冲峰值电压、脉冲重复频率、通气速率、溶液电导率对生成过氧化氢的影响。研究发现：在放电过程中，增大脉冲峰值电压、脉冲重复频率、通气速率，过氧化氢的生成量均增大。随着溶液电导率的增大，溶液电导率对生成过氧化氢的影响减小。

Abstract: The high-voltage pulse discharge is a new advanced oxidation technology; the discharge process can produce a variety of reactive free radicals, such as •OH, •O, •H, •HO₂, O₃, H₂O₂ and so on. The active substance can kill algae, pathogens, bacteria, and phytoplankton in the ballast water. H₂O₂ has a longer life in these active substances; the oxidation-reduction potential of H₂O₂ is 1.77 V, and its oxidation-reduction ability is inferior to F₂ (2.87 V) and •OH (2.80 V). H₂O₂ can directly react with pollutants and fungi, in order to achieve the purpose of degradation or sterilization. In this paper, a laboratory-made single needle-plate reactor was used to study the pulse peak voltage of gas-liq- uid two-phase pulse discharge, pulse repetition frequency, ventilation rate, and the impact of solution conductivity on the generation of hydrogen peroxide. The research found that during the discharge process, increasing the pulse peak voltage, pulse repetition frequency and ventilation rate can lead to increasing amount of hydrogen peroxide. The solution conductivity has less impact on the generation of hydrogen peroxide when increasing.