中空纤维疏水膜辅助阴极强化H2O2在线电合成性能研究  

Hollow fiber hydrophobic membrane-assisted cathodic enhancement of H_(2)O_(2)on-line electrosynthesis performance study

作　　者：刘杉 赵学辉[1] 王梦雪 LIU Shan;ZHAO Xuehui;WANG Mengxue(School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学环境科学与工程学院,天津300387

出　　处：《膜科学与技术》2025年第2期117-126,共10页Membrane Science and Technology

基　　金：国家自然科学基金项目(U23B20165)。

摘　　要：氧的传质及利用率是影响电芬顿(Electro-Fenton)工艺效率的关键因素。本研究构建了中空纤维膜曝气辅助阴极在线电合成H_(2)O_(2)工艺装置,利用中空纤维膜曝气增强溶液中氧传质及浓度,以强化阴极在线电合成H_(2)O_(2)的生成效率。实验考察了pH、电流密度、极板间距、曝气量及曝气位置等工艺参数对H_(2)O_(2)在线生成量的影响。实验结果表明,中空纤维疏水膜曝气辅助阴极在H_(2)O_(2)产量和氧利用率上均显著优于陶瓷头曝气工艺,中间曝气(距阴极1 cm),曝气量为10 mL/min,电流密度为19.2 mA/cm^(2),极板间距为4 cm的条件下,H_(2)O_(2)的产量可以达到59.20 mg/L,电流效率为97.42%,氧利用率为1.63%。实验结果为中空纤维疏水膜曝气耦合电芬顿工艺的开发应用提供了重要的数据参考。Oxygen mass transfer and utilization are the key factors affecting the efficiency of electro-Fenton process.In this study,a hollow fiber membrane aeration-assisted cathodic on-line electrosynthesis of H_(2)O_(2) process unit was constructed to enhance the oxygen transfer and concentration in the solution using hollow fiber membrane aeration to strengthen the generation efficiency of cathodic on-line electrosynthesis of H_(2)O_(2).The effects of process parameters such as pH,current density,polar plate spacing,aeration volume and aeration position on the online generation of H_(2)O_(2) were investigated.The experimental results showed that the hollow fiber hydrophobic membrane aeration-assisted cathode was significantly better than the ceramic head aeration process in terms of H_(2)O_(2) production and oxygen utilization,and under the conditions of intermediate aeration(1 cm from the cathode),aeration volume of 10 mL/min,current density of 19.2 mA/cm^(2),and polarplate spacing of 4 cm,the production of H_(2)O_(2) could reach 59.20 mg/L with a current efficiency of 97.42%,and the oxygen utilization rate was 1.63%.The experimental results provide important theoretical support for the development and application of hollow fiber hydrophobic membrane aeration coupled with Electro-Fenton process.

关 键 词：电芬顿 中空纤维疏水膜 过氧化氢 氧传质 

分 类 号：TQ123.6[化学工程—无机化工]