Abstract
Tungsten-Titanium pillared clay and sulfated-Titanium pillared clay catalysts were prepared and characterized by different techniques: X-ray diffraction, BET surface area - pore volume measurements, chemical analysis, thermogravimetric and differential thermal analysis, temperature programmed reduction by hydrogen then studied for n-hexane isomerisation reaction. The simultaneous addition of both tungsten and titanium solutions to the clay suspension induces an increase of the basal spacing leading to a well defined structure of the WTi-pillared clay. Better micro porosity but lower specific surface areas at high temperature were observed on WTi-pillared clay compared to Ti-pillared clays prepared in presence or absence of sulfate. All the investigated materials are active in the n-hexane isomerisation reaction. Furthermore the WTi-pillared clay catalyst displays the highest selectivity towards mono-ramified isomers products.
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