A Study on The Effects Produced by Modification of Supported SO4/ZrO2 Catalysts with Sn, Fe and Mn Additives in Isomerization of n-Hexane

The paper deals with the modifying effect of tin, iron and manganese, which are introduced at different stages of the synthesis, on the reaction of n-hexane isomerization in the presence of supported Pt/SZ/Al2O3 catalysts. The addition of a modifier was shown to affect the catalytic performance in isomerization reaction. The activity of modified catalysts increases due to redistribution of Broensted and Lewis acid sites with the preferential increase in the LAS content. The deposition of iron and manganese on alumina or the introduction of tin, iron and manganese in aluminum hydroxide increases the yield of the sum of hexane isomers to 80-85 wt.%, and the yield of the sum of dimethylsubstituted isomers to 28-33 wt.%.