Abstract
γ-AlO(OH) sol solution was prepared by aluminum isopropoxide as an initial material. γ-Al2O3 membrane on the α-Al2O3 support was continuously made through coating and thermal treatment from the α-AlO(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-AlO(OH) sol. Based on this fact, the γ-Al2O3 membrane was prepared with two aging conditions 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.
Similar content being viewed by others
References
Chai, M., Yamashita, Y., Machida, M., Eguchi, K. and Arai, H., “Preparation and Characterization of Metal-Dispersed Alumina Membranes for Selective Separation of Hydrogen,”J. Memb. Sci.,97, 199 (1994).
Chan, K. C. and Brownstein, A. K., “Ceramic Membranes-Growth Prospects and Opportunities,”Ceramic Bulletin,70, 703 (1991).
Lee, S.-J., Yang, S.-M. and Park, S. B., “Synthesis of Palladium Impregnated Alumina Membrane for Hydrogen Separation,”J. Memb. Sci.,96, 223 (1994).
Paul, J. and Pradier, C. M., “Carbon Dioxide Chemistry: Environmental Issue,” THE ROYAL SOCIETY OF CHEMISTRY (1994).
So, J.-H., Yoo, K.-Y., Yang, S.-M. and Park, S. B., “Preparations of Metal Imprgnated Porous Inorganic Membranes for Hydrogen Separation by Multi-Step Pore Modification,”Korean J. Chem. Eng.,16, 180 (1999).
Yoldas, B. E., “Hydrolysis of Aluminum Alkoxides and Bayerite Conversion,”J. Appl. Chem. Biotechnol.,23, 803 (1973).
Yoldas, B. E., “A Transparent Porous Alumina,”Ceramic Bulletin,54, 286 (1975a).
Yoldas, B. E., “Alumina Gels that Form Porous Transparent Al2O3,”J. Mat. Sci.,10, 1856 (1975b).
Yoldas, B. E., “Alumina Sol Preparation from Alkoxides,”Amer. Ceram. Soc. Bull.,54, 289 (1975c).
Yoo, S.-J., Lee, J.-W., Hwang, U.-Y., Yoon, H.-S. and Park, H.-S., “Effect of Aging among γ-AlO(OH) Sol Preparation Steps Variables to Control Microstructure of γ-Al2O3 Membrane,”HWAHAK KONGHAK,35, 832 (1997).
Yoo, S.-J., Lee, J.-W., Hwang, U.-Y., Yoon, H.-S. and Park, H.-S., “Effect of Peptization in γ-AlO(OH) Sol Preparation Process on Microstructure of γ-Al2O3 Membrane,”HWAHAK KONGHAK,36, 635 (1998).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yoo, SJ., Lee, JW., Hwang, UY. et al. H2/CO2 separation characteristics of γ-Al2O3 membrane by aging stage in sol-gel process. Korean J. Chem. Eng. 17, 438–443 (2000). https://doi.org/10.1007/BF02706857
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02706857