Microstructural adjustment of Ni-BaCe0.9Y0.1O 3-δ cermet membrane for improved hydrogen permeation

Hyejin Kim, Boyoung Kim, Jong Heun Lee, Kiyong Ahn, Hae Ryoung Kim, Kyung Joong Yoon, Byung Kook Kim, Young Whan Cho, Hae Weon Lee, Jong Ho Lee

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34 Citations (Scopus)

Abstract

Dense ceramic membranes are usually hybridized with an electronically conductive metallic phase to enhance their hydrogen permeation fluxes, thereby increasing the hydrogen-production efficiency of hydrogen separation membranes. Herein, the hydrogen-separation properties of membranes fabricated from cermets containing BaCe0.9Y0.1O3-δ (BCY) as the proton-conducting ceramic phase and Ni as the electronic-conducting metal phase were investigated with respect to the compositions of the Ni-BCY mixture. Because the hydrogen permeability of a cermet membrane is seriously affected by microstructural parameters such as grain size and homogeneity of the cermet mixture used to fabricate it, we tried to optimize the microstructures and compositions of the Ni-BCY cermets by controlling their fabrication conditions. A high-energy milling process was employed to fabricate fine-grained, dense membranes that exhibited high levels of mixing homogeneity. From the adjustment of composition and microstructure of Ni-BCY composites, the hydrogen permeability of Ni-BCY cermet membranes can be significantly increased so that hydrogen fluxes of ~0.76 cm3/(min cm2) at 800 C can be achieved.

Original languageEnglish
Pages (from-to)4117-4126
Number of pages10
JournalCeramics International
Volume40
Issue number3
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • Ceramic membranes
  • Cermets
  • High-energy milling
  • Hydrogen permeation
  • Proton conductor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Kim, H., Kim, B., Lee, J. H., Ahn, K., Kim, H. R., Yoon, K. J., Kim, B. K., Cho, Y. W., Lee, H. W., & Lee, J. H. (2014). Microstructural adjustment of Ni-BaCe0.9Y0.1O 3-δ cermet membrane for improved hydrogen permeation. Ceramics International, 40(3), 4117-4126. https://doi.org/10.1016/j.ceramint.2013.08.066