Abstract
Production of mononuclear aromatics from naphtha is dominated by catalytic naphtha reforming. The combination of naphtha hydrotreating followed by catalytic naphtha reforming can be found in all petroleum refineries. This conversion process makes use of the combined catalytic effect of a reduced noble metal, platinum, and an acid support material. The catalysis that is involved in direct dehydrocyclization by platinum, the combined effects of metal-and-acid catalysis as found in catalytic naphtha reforming, and aromatization by acid catalysis are discussed. As representative catalysts, nonacidic Pt/L-zeolite, chlorinated Pt/alumina, and H-ZSM-5 catalysts are highlighted. Each of these catalytic pathways can be found in different process technologies. Despite the dominance of catalytic naphtha reforming in petroleum refining, the instances where the other processes have a benefit are pointed out.
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