SELECTIVITY IN THE CONVERSION OF N-HEPTANE ON AN AL-PILC MODIFIED WITH GA

This work compares the catalytic activity for the hydroisomerization a nd hydrocracking of n-heptane for two pillared clay materials, one wit h polyoxycations of Al and the other with the same cation modified by the inclusion of Ga. The conversion rate for the clay pillared with mi xed cations is lower than that for the material pillared only with alu minum throughout the temperature range, which is attributable to its s maller specific surface area. However, at high temperatures the conver sion rate of the material with mixed pillars continues to rise steadil y, indicating a greater thermal stability. The incorporation of Ga als o increases the selectivity for isomerization.