Tetsuji Tatsumi1, Hiromi Matsuhashi1, Kazushi Arata1
1Department of Science, Hokkaido University of Education1-2 Hachiman-cho, Hakodate 040
Tóm tắt
Abstract
Solid superacids of sulfated zirconia were prepared by the sulfation of zirconia gels, which were obtained from mother solutions with different pH values. The gel precipitated at pH = 8 gave the sulfated zirconia, which showed the highest catalytic activity and selectivity for the skeletal isomerization of n-pentane. The active superacid was obtained with high reproducibility upon heating the mother solution, followed by washing the precipitate with hot water; this preparation procedure provided the oxide of small particle size. The catalytic activity of sulfated zirconia could be estimated from the exothermal peak caused by crystallization of the zirconia gel in DTA.
