LINEAR ALKANE REACTIONS ON SO-4(2-)/ZRO2 SOLID SUPERACID CATALYSTS

作者：GAO Z^*; CHEN JM; TANG Y

来源：Acta Chimica Sinica, 1994, 52(1): 36-41.

The reactions of linear alkanes on SO42-/ZrO2 solid superacid catalysts were studied. The skeletal isomerization and cracking of linear alkanes proceed simultaneously on SO42-/ZrO2 catalysts. Experimental results suggest that the longer the alkyl chain, the higher the activity and the less the isomerization selectivity. The catalytic performance of SO42-/ZrO2 superacid is in close relationship with the water content of the sample. The reactivity of fully dehydrated SO42-/ZrO2 sample is very low. Small amount of water in the sample is necessary for high activity, but excess water will poison the catalyst. Correlating the reaction data with thermogravimetric and IR spectroscopic results, it can be proposed that for the n-pentane at lower reaction temperature the reactions proceed predominantly on surface Bronsted acid sites of the catalyst. Only for alkanes with longer alkyl chains and at higher reaction temperature the Lewis acid sites on the catalyst surface display some reactivities.

• 出版日期1994
• 单位复旦大学