Abstract
Composites of mesoporous γ-alumina and potassium aluminosilicate (KAS) gel were prepared by selective leaching of calcined kaolinite using KOH solution followed by neutralization of the solution at pH 5.5 with nitric acid. The porous properties of the composites were characterized by N2 gas adsorption and their microtextures were observed by electron microscope. The resultant composites have specific surface areas of about 290 m2/g, pore sizes of about 1.85 nm in radius and pore volumes of about 0.5 ml/g. The porous properties of the composites are compared with those of γ-alumina and KAS gel.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K. Okada, H. Kawashima, Y. Saito, S. Hayashi, and A. Yasumori, J. Mater. Chem. 5, 1241 (1995).
Y. Saito, Porous Properties and Thermal Stability of γ-Alumina. Ph.D. dissertation, Tokyo Institute of Technology, Tokyo, 1997.
K. Okada, Y. Saito, M. Hiroki, T. Tomita, and S. Tomura, J. Por. Mater. 4, 253 (1997).
J. Temuujin, K. Okada, and K.J.D. MacKenzie, Appl. Clay Sci. in press.
K.S.W. Sing, D.H. Everett, R.A.W. Haul, L. Moscou, R.A. Pieotti, J. Rouquerol, and T. Siemieniewska, Pure and Appl. Chem. 57, 603 (1985).
E.M. Levin, C.R. Robbin, and H.F. McMurdie, Phase Diagrams for Ceramics (Am. Ceram. Soc., Columbus, 1964), Fig. 407.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Temuujin, J., Okada, K. Porous Properties of γ-Alumina/Potassium Aluminosilicate Gel Composites Prepared by Selective Leaching and Precipitation Method. Journal of Porous Materials 9, 155–159 (2002). https://doi.org/10.1023/A:1020838610352
Issue Date:
DOI: https://doi.org/10.1023/A:1020838610352