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首页> 外文期刊>International journal of hydrogen energy >Hydrogen production aided by new (1-x) SrTi_(0.5)Fe_(0.5)O_(3-δ)-xCe_(0.8)(Sm_(0.8)Sr_(0.2))_(0.2)O_(2-δ)(MIEC) composite membranes
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Hydrogen production aided by new (1-x) SrTi_(0.5)Fe_(0.5)O_(3-δ)-xCe_(0.8)(Sm_(0.8)Sr_(0.2))_(0.2)O_(2-δ)(MIEC) composite membranes

机译：新型（1-x）SrTi_（0.5）Fe_（0.5）O_（3-δ）-xCe_（0.8）（Sm_（0.8）Sr_（0.2））_（0.2）O_（2-δ）（ MIEC）复合膜

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摘要

In the present work, composite materials of the type (1-x)SrTi_(0.5)Fe_(0.5)O_(3-δ) -xCe_(0.8)(Sm_(0.8)Sr_(0.2))_(0.2)O_(2-δ) (with x = 0, 0.25, 0.5, 0.75 and 1) are obtained by the two step solid state technique. Their transport properties are investigated in terms of their usage as mixed ionic-electronic conducting (MIEC) membrane materials for hydrogen production. It is found that, in reducing conditions the composites are characterized by mixed conductivity, which level is controlled by the electrical properties of the prevailing phase. Moreover, at 900 ℃ and pO_2 = 10~(-18) atm, total conductivity, ambipolar conductivity and oxygen permeability of composites dramatically grow (each of about 500%), when the fluorite component content x increases from 0 to 1. High-conducting and strengthened material 0.5SrTi_(0.5)Fe_(0.5)O_(3-δ)-0.5Ce_(0.8)(Sm_(0.8)Sr_(0.2))_(0.2)O_(2-δ) is chosen for making tube shaped membranes using the tape rolling method, which are successfully applied for hydrogen production in laboratory scale. The hydrogen flux reached 0.176 ml cm~(-2) min~(-1) for x = 1, T = 900 ℃ and emf = 10 mV.
机译：在目前的工作中，（1-x）SrTi_（0.5）Fe_（0.5）O_（3-δ）-xCe_（0.8）（Sm_（0.8）Sr_（0.2））_（0.2）O_（通过两步固态技术获得2-δ）（x = 0、0.25、0.5、0.75和1）。根据其用作制氢的混合离子电子导电（MIEC）膜材料的用途，研究了它们的传输性能。已经发现，在还原条件下，复合材料的特征在于混合电导率，该电导率的水平由主要相的电学性质控制。此外，在900℃和pO_2 = 10〜（-18）atm时，当萤石组分含量x从0增加到1时，复合材料的总电导率，双极电导率和氧渗透率急剧增加（各自约为500％）。导电增强材料0.5SrTi_（0.5）Fe_（0.5）O_（3-δ）-0.5Ce_（0.8）（Sm_（0.8）Sr_（0.2））_（0.2）O_（2-δ）制成管使用卷带法的异型膜，已成功应用于实验室规模的制氢。当x = 1，T = 900℃，emf = 10 mV时，氢通量达到0.176 ml cm〜（-2）min〜（-1）。

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  • 来源
    《International journal of hydrogen energy》 |2014年第24期|12472-12479|共8页
  • 作者

    A. Murashkina; E. Pikalova; D. Medvedev; A. Demin; P. Tsiakaras;

  • 作者单位

    Institute of High Temperature Electrochemistry, 620990 Yekaterinburg, Russia,Department of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia;

    Institute of High Temperature Electrochemistry, 620990 Yekaterinburg, Russia,Department of Environmental Economics, Ural Federal University, 620002 Yekaterinburg, Russia;

    Institute of High Temperature Electrochemistry, 620990 Yekaterinburg, Russia;

    Institute of High Temperature Electrochemistry, 620990 Yekaterinburg, Russia;

    Institute of High Temperature Electrochemistry, 620990 Yekaterinburg, Russia,Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 383 34 Volos, Greece;

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

    Hydrogen production; Composite materials; MIEC; Ambipolar conductivity; Oxygen permeability;

    机译：制氢;复合材料;MIEC;双极性电导率;透氧性;

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