Abstract: Aseries of new superacid catalysts MCM-41 supported SO₄^2-/ZrO₂(SZ) were prepared first by an impregnation calcination method. The variation roles of their texture constructions and acid properties were investigated in detail. It was shown that, a high amount of ZrO₂ could result in the damage of the pore system of MCM-41, however, superacid sites could not formed under a low amount of SZon MCM-41. The proper amount of SZis about 40%. The superacidities of samples were increased with the increas|ing of ZrO₂ contents. Both medium strong acidities and weak acidities of samples were enhanced with the introducing of SZ. The acidities of samples can be adjusted by changing the amount of SZon MCM-41. This may be valuable in designing catalysts for the cracking reaction of large molecule hydrocarbon.

Key words: SO₄^2-/ZrO₂, MCM-41, Supported superacid