Asymmetric Lanthanum Doped Ceria Membrane with Proton Conductive and Hydrogen Separation Capability for Solid Oxide Fuel Cell

Authors

  • Warit Ua-amnueychai Tokyo Institute of Technology
  • Keishi Asada Tokyo Institute of Technology
  • Katsunori Hanamura Tokyo Institute of Technology

DOI:

https://doi.org/10.4186/ej.2015.19.3.49

Keywords:

Lanthanum doped ceria, hydrogen separation, proton conducting, asymmetric membrane, solid oxide fuel cells.

Abstract

An asymmetric lanthanum doped ceria (LDC) membrane was prepared by sintering process. The membrane consisted of two layers, dense LDC and porous Ni-LDC layers with a total thickness of approximately 850 μm. According to the XRD pattern, sintering process did not cause any chemical changes to the membrane. The membrane had a crystalline dense LDC layer with a highest hydrogen permeation flux of 1.3 × 10-3 mol∙m-2∙s-1, observed at a hydrogen partial pressure of 65.9 kPa and operating temperature of 800oC. The hydrogen permeation increased as the partial pressure of the hydrogen gas increased. The proton conducting permeation became more dominant as the hydrogen partial pressure decreased. The highest value was observed at 20.3 kPa of hydrogen partial pressure, where 50.6% of the total permeation came from proton conducting ability of the membrane. While, the decreased in the operating temperature decreased the proton conductive permeation flux. With the decrease in the sintering temperature, the amount of pores in the dense LDC layer increased. The LDC membrane with both proton conductivity and hydrogen separation capability shows a promising potential as a hydrogen separation membrane and as a solid electrolyte for the solid oxide fuel cell.

Downloads

Download data is not yet available.

Author Biographies

Warit Ua-amnueychai

Department of Chemical Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan

Keishi Asada

Department of Mechanical and Control Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan

Katsunori Hanamura

Department of Mechanical and Control Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan

Published

Vol 19 No 3, May 28, 2015

How to Cite

[1]
W. Ua-amnueychai, K. Asada, and K. Hanamura, “Asymmetric Lanthanum Doped Ceria Membrane with Proton Conductive and Hydrogen Separation Capability for Solid Oxide Fuel Cell”, Eng. J., vol. 19, no. 3, pp. 49-60, May 2015.