Effect of Aluminum on the Mechanical Stress Stability of WOx/ZrO2 Superacid

Abstract

Abstract: Tetragonal structure of ZrO2 support is very important for WOx/ZrO2 catalysts to be highly active. In this study, it was found that mechanical stress treatments (grinding in a mortar or pressing under 50 MPa) resulted in a partial phase transformation of WOx/ZrO2 from tetragonal ZrO2 to monoclinic ZrO2 and also decreased the n-heptane isomerization activity of the Pt/WOx/ZrO2 catalyst. The addition of aluminum greatly improved the resistance of WOx/ZrO2 to mechanical stress and maintained its n-heptane isomerization activity.

Key words: zirconia, solid acid, alkane isomerization, mechanical stress

TIAN Ge;XU Yunpeng;XU Zhusheng;TIAN Zhijian*;LIN Liwu. Effect of Aluminum on the Mechanical Stress Stability of WOx/ZrO2 Superacid[J]. Chinese Journal of Catalysis, 2008, 29(5): 415-417.

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Effect of Aluminum on the Mechanical Stress Stability of WOx/ZrO2 Superacid

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