TY - JOUR
T1 - Preparation and properties of hydrothermally stable γ-alumina-based composite mesoporous membranes
AU - Zahir, Md Hasan
AU - Sato, Koji
AU - Mori, Hiroshi
AU - Iwamoto, Yuji
AU - Nomura, Mikihiro
AU - Nakao, Shin Ichi
PY - 2006/9/1
Y1 - 2006/9/1
N2 - We report here on our thermal and hydrothermal investigations comparing mesoporous γ-Al 2O 3 membrane with single and double dopant membranes prepared by the sol-gel method. Improvements in the hydrothermal stability of mesoporous γ-Al 2O 3 by transition (Ga 3+) or rare-earth (La 3+) cations are discussed, along with the effectiveness of double dopant (Ga 3+- La 3+). The amounts of Ga 2O 3 oxide used varied between 0.0 and 30 mol% and those of La 2O 3 between 6 and 15 mol%. The thermal and hydrothermal (up to 75% steam) stability of nine types of membranes fabricated on an asymmetric porous α-Al 2O 3 support by means of a dip-coating process was characterized by H 2 gas permeation at 500°C. By conducting tests with wide variations in dopant concentrations, material characterizations, and gas permeance performance, we have been able to optimize the key parameters for hydrothermally stable systems.
AB - We report here on our thermal and hydrothermal investigations comparing mesoporous γ-Al 2O 3 membrane with single and double dopant membranes prepared by the sol-gel method. Improvements in the hydrothermal stability of mesoporous γ-Al 2O 3 by transition (Ga 3+) or rare-earth (La 3+) cations are discussed, along with the effectiveness of double dopant (Ga 3+- La 3+). The amounts of Ga 2O 3 oxide used varied between 0.0 and 30 mol% and those of La 2O 3 between 6 and 15 mol%. The thermal and hydrothermal (up to 75% steam) stability of nine types of membranes fabricated on an asymmetric porous α-Al 2O 3 support by means of a dip-coating process was characterized by H 2 gas permeation at 500°C. By conducting tests with wide variations in dopant concentrations, material characterizations, and gas permeance performance, we have been able to optimize the key parameters for hydrothermally stable systems.
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U2 - 10.1111/j.1551-2916.2006.01165.x
DO - 10.1111/j.1551-2916.2006.01165.x
M3 - Article
AN - SCOPUS:33747611203
SN - 0002-7820
VL - 89
SP - 2874
EP - 2880
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 9
ER -