Efficient production of hydrogen peroxide in microbial reverse-electrodialysis cells coupled with thermolytic solutions  

作　　者：Xi Luo Ao Li Xue Xia Peng Liang Xia Huang 

机构地区：[1]College of Life and Environmental Sciences,Minzu University of China,Beijing 100081,China [2]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China [3]Yangtze Ecology and Environment Co.,Ltd.,Wuhan 430062,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第9期137-146,共10页环境科学与工程前沿（英文）

基　　金：supported by the Special Fund of the State Key Joint Laboratory of Environment Simulation and Pollution Control(No.22K06ESPCT);a scholarship from Shanghai Tongji Gao Tingyao Environmental Science and Technology Development Foundation,and the Fundamental Research Fund for the Central Universities(No.2022QNYL25).

摘　　要：H_(2)O_(2) was produced at an appreciable rate in microbial reverse-electrodialysis cells(MRCs)coupled with thermolytic solutions,which can simultaneously capture waste heat as electrical energy.To determine the optimal cathode and membrane stack configurations for H_(2)O_(2) production,different catalysts,catalyst loadings and numbers of membrane cell pairs were tested.Carbon black(CB)outperformed activated carbon(AC)for H_(2)O_(2) production,although AC showed higher catalytic activity for oxygen reduction.The optimum CB loading was 10 mg/cm^(2) in terms of both the H_(2)O_(2) production rate and power production.The optimum number of cell pairs was determined to be three based on a tradeoff between H_(2)O_(2) production and capital costs.A H_(2)O_(2) production rate as high as 0.99±0.10 mmol/(L·h)was achieved with 10 mg/cm^(2) CB loading and 3 cell pairs,where the H_(2)O_(2) recovery efficiency was 52±2%and the maximum power density was 780±37 mW/m^(2).Increasing the number of cell pairs to five resulted in an increase in maximum power density(980±21 mW/m^(2))but showed limited effects on H_(2)O_(2) production.These results indicated that MRCs can be an efficient method for sustainable H_(2)O_(2) production.

关 键 词：Microbial reverse-electrodialysis cell Hydrogen peroxide production Ammonium bicarbonate Electrolysis cell Optimization 

分 类 号：S15[农业科学—土壤学]