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Issue
Korean Journal of Chemical Engineering,
Vol.17, No.4, 438-443, 2000
H2/CO2 Separation Characteristics of γ-Al2O3 Membrane by Aging Stage in Sol-Gel Process
Yoo SJ, Lee JW, Hwang UY, Park HS, Park DR, Jang HD, Yoon HS
γ-AIO(OH) sol solution was prepared by aluminum isopropoxide as an initial material. γ-Al2O3 membane on the α-Al2O3 support was continuously made through coating and thermal treatment from the γ-AIO(OH) sol. Previous work [Yoo et al., 1997] has shown that the aging stage in the sol preparation process mainly affects the characterization of γ-Al2O3 particles as well as γ-AIO(OH) sol. Based on this fact, the γ-AI2O3 membrane was prepared with two aging condition in the present study. The separation characteristics experiment of the H2/CO2 mixture was performed on these membranes. As a result of the study, the mechanism of gas transport on the two membranes was proved as Knudsen diffusion. The ideal separation factor was reached at the value of the calculated Knudsen separation factor; however, permeability increased and selectivity decreased selectivity according to the aging.
Keywords: Aging; Microstructure; γ-AIO(OH) Sol; γ-Al2O3 Membrane; Permeability; Selectivity
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[Cited By]
  1. Yoo SJ, Baek WS, Park HJ, Lee JW, Kim SG, Hwang UY, Park HS, Yoon HS, HWAHAK KONGHAK, 40(3), 371, 2002
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