Abstract
This chapter presents dual pathways for benzene hydrogenation on platinum (Pt)/mordenites. The catalytic testing of Pt supported MOR with various Na + /H + ratio shows that benzene hydrogenation occurs through two pathways—namely, on metal sites and on BrØnsted acid sites with hydrogen spilt over from the close metal surface. In the presence of sulfur, the metal surface is poisoned and the catalytic activity remains on BrØnsted acid sites. Because of a subtle balance between a high BrØnsted acid site concentration that deactivates the catalysts by coking and metal sulfur poisoning and a low BrØnsted acid site concentration––that is, low benzene conversion on the acid sites––Pt supported on partially exchanged MOR shows a higher rate of benzene conversion and a higher sulfur resistance than on all other catalysts.
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