基于等离子体的二甲醚部分氧化重整制氢研究

Production of hydrogen-rich gas by plasma reforming of dimethyl ether

应用自制的车载等离子体富氢气体制备装置,进行了二甲醚(DME)部分氧化重整制氢实验,研究了操作参数、结构参数、电极材料和电极散热特性对产物中气体组成和氢产率的影响。结果表明,常温常压下,H2的体积分数和氢产率随占空比和放电频率的增大先增大后减小,当占空比为80%和频率为170 Hz时分别达到最大;随电极直径的增大和发生腔数量的增加而增大,随正极散热能力的提高而降低;当空醚比从0.5增大到4.0时,H2的体积分数随空醚比的增大而逐渐减小,氢产率则先增大后减小,空醚比为3.5时氢产率最大;选用铱合金正极、铜质负极以及合适的发生腔半径对产氢有利。

The production of hydrogen-rich gas by plasma reforming of DME was conducted in a self-made three-cavity reformer at atmospheric pressure and ambient temperature.The effects of reformer structure parameters,electrode material,heat transfer characteristic,and operation parameters on the gas composition and hydrogen yield were investigated.The results indicated that with the increase of pulse duty ratio and arc frequency,the yield of hydrogen increases first and reaches a maximum when the pulse duty ratio and arc frequency are 80% and 170 Hz,respectively.The yield of hydrogen increases with the increase of anode diameter and discharge cavity number,but decreases with the increase of anodic heat transfer characteristic.The optimal air/DME ratio is 3.5 to get the highest hydrogen yield.Hydrogen yield and hydrogen concentration in the product can be enhanced by using iridium anodes,cuprum cathodes and reasonable radius of cavities.