预磁极化条件下PEM水电解制氢特性与效率研究

为提高质子交换膜（proton exchange membrane,PEM）水电解制氢速率、降低电解所需能耗,针对磁场预极化条件下蒸馏水的分子极性和应力特性进行研究,通过构建磁场环境下氢质子的能级跃迁微观物理模型与磁化矢量——极化氢质子浓度对应的宏观数学模型,对不同磁场强度下电解液的离子电导率、电流密度和制氢速率进行定性和定量分析,并利用自主搭建的可调节预磁极化PEM水电解制氢试验平台对所提出方法的有效性进行重复试验。试验结果表明,经过预磁极化处理的蒸馏水电导率提高了2~3倍,且随着磁场强度的增加,PEM电解电流密度不断增大,极间电圧不断减小,制氢速率明显提升。

STUDY ON CHARACTERISTICS AND EFFICIENCY OF HYDROGEN PRODUCTION BY PEM WATER ELECTROLYSIS UNDER PRE-MAGNETIC POLARIZATION

To improve the rate of hydrogen production by proton exchange membrane（PEM） electrolysis and to reduce the energy consumption required for water electrolysis, molecular polarity and stress-strain characteristics of distilled water under a magnetic field were investigated in this paper. By constructing an energy-level transition model of hydrogen proton in the magnetic field and building a mathematical model of relative electrolysis efficiency change of the electrolyzer, it carried out both qualitative and quantitative analyses on the ionic conductivity, electrolyte current density, interelectrode voltage, and hydrogen production efficiency under different magnetic field. Further, the change law of the rate of hydrogen production under different magnetic field conditions was observed and analyzed by using an independently designed adjustable pre-magnetically polarized water electrolysis experimental system. The repeated test results show that the conductivity increases by 2-3 times after distilled water is treated with magnetic polarization, the electrolytic current density of the PEM increases with increasing magnetic field strength, the voltage between the poles continuously decreases, and the hydrogen production rate is significantly improved.