Deep hydrodenitrogenation on Pt supported catalysts in the presence of H2S, comparison with NiMo sulfide catalyst.

A comparison of the catalytic activities in 1-4decahydroquinoline hydrodenitrogenation between conventional NiMo sulfide and Pt supported catalysts in the presence of low partial pressure of H 2 S has been made. The results suggested that supported Pt (1 wt-%) are good candidates for a second stage process for deep denitrogenation in the presence of 100 ppm of H 2 S (total pressure 40 bars), Pt on silica-alumina exhibited a better activity than NiMo sulfide catalyst. The variation of H 2 S partial pressure (in the range 0-500 ppm) had no effect on the sulfide catalyst whereas platinum catalysts are deeply affected.