catalytic study of the n-heptane isomerization over hybrid catalysts

Pt loaded on a series of mcm-48 silica and composites with hzsm-5 zeolite, hy zeolite, and tio2 has been prepared and studied for n-heptane isomerization. the results show that these catalysts have good selectivity to isomers products. also, these new composite catalysts prove the catalytic stability at the reaction time. the most desirable results, and significantly higher n-heptane conversion and isomerization selectivity were achieved with pt/mcm48-hzsm5 catalyst. the coke formation on the pt/hy catalyst is lower than the other catalysts, while pt/tio2 has a higher coke content. the porosity, metal dispersion, acidity, and nature of the acid site have led to better performance of these catalysts.