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J. Korean Ceram. Soc. > Volume 52(4); 2015 > Article
Journal of the Korean Ceramic Society 2015;52(4): 269.
doi: https://doi.org/10.4191/kcers.2015.52.4.269
Preparation and Permeation of La2Ce2O7 Membrane
Jihye Park, Miewon Jung
School of Biological Sciences and Chemistry, Institute of Basic Science, Sungshin Women's University
ABSTRACT
$La_2Ce_2O_7$ and $CeO_2$ membranes were fabricated from the corresponding powders derived from sol-gel process with polyvinyl alcohol binder. These powders and membranes were characterized by XRD, BET, and FE-SEM analysis. Hydrogen and CO gas permeation experiments were performed using Sievert's type equipment. Both fluxes on these membranes were found to decrease with increase of the temperature. This phenomenon was followed by the surface and Knudsen diffusion mechanism. The hydrogen permeability of the $La_2Ce_2O_7$ membrane was found to be $7.27{times}10^{-5}mol/m^2sPa$, with perm-selectivity of 7.24 at 303 K.
Key words: $La_2Ce_2O_7$ and $CeO_2$ membranes, Hydrogen permeability, Perm-selectivity
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