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首页> 外文期刊>Energy Conversion & Management >Rate determining step of direct hydrogen and electricity production in SrZr_(0.9)Yb_(0.1)O_(3-a) fuel cell supplied with CH_4 + H_2O
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Rate determining step of direct hydrogen and electricity production in SrZr_(0.9)Yb_(0.1)O_(3-a) fuel cell supplied with CH_4 + H_2O

机译：供应CH_4 + H_2O的SrZr_（0.9）Yb_（0.1）O_（3-a）燃料电池中直接产生氢气和发电的速率确定步骤

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摘要

Direct hydrogen production and its subsequent electricity generation in a ceramic fuel cell system of a SrZr_(0.9)Yb_(0.1)O_(3-a) tube with one end closed is investigated experimentally under the condition where moist CH_4 (or H_2) is supplied to its anode compartment and moist O_2 is supplied to its cathode compartment. Experiments are performed based on an alternating current impedance method. The following three mass transfer resistances are determined separately: (ⅰ) the steam generation reaction on its Ni anode (CH_4 + H_2O = CO + 3H_2); (ⅱ) the transfer of hydrogen ions through the proton conducting ceramic; and (iii) the cathode reaction between H_2 and O_2. It is found that the rate determining step of the overall hydrogen transfer in the cell system of CH_4 + H_2O|Ni|SrZr_(0.9)Yb_(0.9)O_(3-a)|NiO|O_2 + H_2O is the steam reformation reaction on the anode. The electrochemical polarization of the anode due to the CH_4-steam reformation has the activation energy of 89.5 kJ/mol. On the other hand, the rate determining step of the system described as H_2(+H_20)|Ni|SrZr_(0.9)Yb_(0.1)O_(3-a)|NiO|O_2 + H_2O is H~+ migration through the ceramic electrolyte when T > 700 ℃. The activation energy of H~+ migration through the ceramic is 31.5 kJ/mol. The values of the Warburg impedance constants and capacitances of an electric double layer are determined as a function of temperature from 600 ℃ to 800 ℃, when either a CH_4 + H_2O or H_2 + H_2O mixture is supplied to the anode.
机译：在供给湿气CH_4（或H_2）的条件下，对一端封闭的SrZr_（0.9）Yb_（0.1）O_（3-a）管的陶瓷燃料电池系统中的直接氢产生及其随后的发电进行了实验研究到阳极室，潮湿的O_2被供应到阴极室。基于交流阻抗法进行实验。分别确定以下三个传质阻力：（ⅰ）在其Ni阳极上产生蒸汽的反应（CH_4 + H_2O = CO + 3H_2）； （ⅱ）氢离子通过质子传导陶瓷的转移； （iii）H_2与O_2之间的阴极反应。发现在CH_4 + H_2O | Ni | SrZr_（0.9）Yb_（0.9）O_（3-a）| NiO | O_2 + H_2O的电池系统中整个氢转移的速率决定步骤是在阳极。由于CH 4-蒸汽重整而导致的阳极的电化学极化具有89.5 kJ / mol的活化能。另一方面，描述为H_2（+ H_20）| Ni | SrZr_（0.9）Yb_（0.1）O_（3-a）| NiO | O_2 + H_2O的系统的速率确定步骤是H〜+通过陶瓷的迁移当T＞ 700℃时为电解液。 H +迁移穿过陶瓷的活化能为31.5 kJ / mol。当向阳极提供CH_4 + H_2O或H_2 + H_2O混合物时，根据温度从600℃到800℃确定电气双层的Warburg阻抗常数和电容值。

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  • 来源
    《Energy Conversion & Management》 |2009年第5期|1249-1255|共7页
  • 作者

    Satoshi Fukada; Shigenori Suemori; Ken Onoda;

  • 作者单位

    Department of Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Hakozaki, Wgashi-ku, Fukuoka 812-8581, Japan;

    Department of Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Hakozaki, Wgashi-ku, Fukuoka 812-8581, Japan;

    Department of Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Hakozaki, Wgashi-ku, Fukuoka 812-8581, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fuel cell; Sr-Zr-Yb oxide; hydrogen; methane reformation; protonic conduction;

    机译：燃料电池;Sr-Zr-Yb氧化物;氢;甲烷重整质子传导;

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