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HYDROGEN PRODUCTION BY WATER SPLITTING USINGMIXED CONDUCTING MEMBRANES*

机译:使用混合的导电膜通过水分解制氢*

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摘要

We have studied the production of hydrogen by water dissociation at moderaterntemperatures (700-900°C) with novel mixed-conducting membranes. Hydrogen production ratesrnwere investigated as a function of temperature, water partial pressure, membrane thickness, andrnoxygen chemical potential gradient across the membranes. The hydrogen production raternincreased with both increasing moisture concentration and oxygen chemical potential gradient.rnA hydrogen production rate of 6 cm3(STP)/min-cm2 was measured when we used a 0.10-mmthickrnmembrane at 900°C and 50 vol.% water vapor on one side of the membrane and 80%rnhydrogen (balance helium) on the other side. Hydrogen was used as a model gas on one side ofrnthe membrane to establish a high oxygen potential gradient; however, another reducing gas,rnmethane, was substituted in one experiment to maintain the high oxygen potential gradient. Thernhydrogen production rate increased with decreasing membrane thickness, but surface kineticsrnplayed an important role as membrane thickness decreased.
机译:我们已经研究了通过新型混合导电膜在中等温度(700-900°C)下通过水分解产生氢的方法。研究了氢气产生速率随温度,水分压,膜厚度和跨膜的氧化学势梯度的变化。制氢率随着水分浓度和氧气化学势梯度的增加而增加.rn当我们在900°C下使用0.10毫米厚的膜和50体积%的水蒸气时,测得的制氢率为6 cm3(STP)/ min-cm2。膜的一侧,另一侧是80%的氢(平衡氦)。氢气在膜的一侧用作模型气体,以建立高氧势梯度。然而,在一个实验中,另一种还原性气体甲烷被替代以维持高氧势梯度。氢的生成速率随着膜厚度的减小而增加,但是随着膜厚度的减小,表面动力学起着重要的作用。

著录项

  • 来源
  • 会议地点 Washington DC(US)
  • 作者单位

    Energy Technology DivisionrnArgonne National LaboratoryrnArgonne, IL 60439, USA;

    Energy Technology DivisionrnArgonne National LaboratoryrnArgonne, IL 60439, USA;

    Energy Technology DivisionrnArgonne National LaboratoryrnArgonne, IL 60439, USA;

    Energy Technology DivisionrnArgonne National LaboratoryrnArgonne, IL 60439, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 氢能及其利用;
  • 关键词

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