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首页> 外文会议>Ionic and mixed conducting ceramics 9 >Electrochemical, Catalytic and O_2-Permeation Studies of Iron-Doped Barium Zirconates for Membrane Reactor Applications
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Electrochemical, Catalytic and O_2-Permeation Studies of Iron-Doped Barium Zirconates for Membrane Reactor Applications

机译：膜反应器中掺铁锆酸钡的电化学，催化和O_2渗透研究

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摘要

An Fe-doped Barium Zirconate perovskite (Ba_(0.9)Fe_(0.1)Zr_(0.1)O_(3-δ)) is investigated for electrochemical and catalytic activity at 800℃ via combination of gas effluent mass spectroscopy and electrochemical impedance spectroscopy (EIS). Results confirm competitive reaction rates for both CO_2 reduction to CO and O_2 under dry-gas conditions and CO oxidation to CO_2 and H_2 in the presence of steam. A combination of both p-type and n-type semiconduction behavior is suggested to explain the complex dependence of electrical conductivity upon individual gas species partial pressure. Separate gas permeation measurements confirm an O_2 permeability of 9.52×10~(12) mol.m~(-1).s~(-1).Pa~(-1), which is competitive with similarly reported zirconate-based perovskite materials.
机译：结合气体流出质谱和电化学阻抗谱（EIS），研究了Fe掺杂锆钛酸钡（Ba_（0.9）Fe_（0.1）Zr_（0.1）O_（3-δ）在800℃下的电化学和催化活性。 ）。结果证实了在干燥气体条件下，CO_2还原为CO和O_2的竞争性反应速率，以及在蒸汽存在下CO氧化为CO_2和H_2的竞争性。建议结合使用p型和n型半导体行为来解释电导率对各个气体物种分压的复杂依赖性。单独的气体渗透测量结果证实O_2的渗透率为9.52×10〜（12）mol.m〜（-1）.s〜（-1）.Pa〜（-1），与类似报道的锆酸盐基钙钛矿材料相比具有竞争力。

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  • 会议地点 Orlando FL(US)
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    H. Zhang; A. Suresh; C.B. Carter; B.A. Wilhite;

  • 作者单位

    Artie McFerrin Department of Chemical Engineering, Texas AM University, College Station TX 77843-3122, USA;

    Department of Chemical and Biomolecular Engineering, Univ. of Connecticut, Storrs, CT 02139-3112, USA;

    Department of Chemical and Biomolecular Engineering, Univ. of Connecticut, Storrs, CT 02139-3112, USA;

    Artie McFerrin Department of Chemical Engineering, Texas AM University, College Station TX 77843-3122, USA;

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