Hydrothermal stability of mesoporous Ni-doped γ-Al2O3

Takayuki NAGANO; Koji SATO; Tomohiro SAITOH; Seiji TAKAHASHI

doi:10.2109/jcersj2.117.832

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Hydrothermal stability of mesoporous Ni-doped γ-Al₂O₃

Takayuki NAGANO, Koji SATO, Tomohiro SAITOH, Seiji TAKAHASHI

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Keywords: Sol-gel, Mesoporous membrane, Hydrothermal stability, Gas permeance, Pore size distribution

JOURNAL FREE ACCESS

2009 Volume 117 Issue 1367 Pages 832-835

DOI https://doi.org/10.2109/jcersj2.117.832

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Abstract

Ni-doped γ-Al₂O₃ with different molar compositions has been synthesized on α-Al₂O₃ porous supports by the sol-gel method using nitrate-alkoxide precursors. The increasing of lattice constants by Ni doping showed the formation of uniform solid solution. When the Ni content increased up to 10 mol%, NiO phase was formed. The relationship between molar compositions and hydrothermal stability under atmosphere of steam/N₂ = 3 at 773 K for 0-50 h was compared. The pore size distribution of 5 mol% Ni-doped γ-Al₂O₃ on α-Al₂O₃ porous support was stable even after hydrothermal exposure at 773 K for 50 h.

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