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Zr‐ and Tb‐doped barium cerate‐based cermet membrane for hydrogen separation application
Author(s) -
Islam Quazi A.,
Raja Mir W.,
Basu Rajendra N.
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14737
Subject(s) - cermet , materials science , reducing atmosphere , non blocking i/o , hydrogen , perovskite (structure) , barium , membrane , chemical engineering , permeation , metallurgy , ceramic , chemistry , biochemistry , organic chemistry , engineering , catalysis
Ba 0.8 Ce 0.35 Zr 0.5 Tb 0.15 O 3‐δ ( BCZT ) perovskite has been synthesized by glycine‐assisted solution combustion method. The Ni‐Ba 0.8 Ce 0.35 Zr 0.5 Tb 0.15 O 3‐δ ‐based cermet membrane is obtained by cosintering NiO and BCZT powder mixture at 1550°C in reducing atmosphere. The X‐ray diffraction pattern of sintered pellet shows the characteristic peaks of both Ni and BCZT phases. FESEM image and elemental mapping confirm the presence of randomly distributed metallic nickel in the BCZT matrix. An electrical conductivity of ~14 S/cm at 700°C is achieved in Ni‐ BCZT membrane, which reduced further with increase in temperature (>700°C). The cermet membrane (1.5 mm thick) shows a highest hydrogen permeation flux of ~0.07 mL/min/cm 2 at 900°C. Chemical stability of Ni‐ BCZT membrane has also been examined under humid and carbon dioxide containing atmosphere. The membrane shows good structural stability without any significant change in hydrogen permeation flux.