Cyclization over dual-function catalysts

IV. Cyclization over Dual Function Catalysts and Oxides.311... 

Sinfelt et al. (120) observed a twofold increase in the -heptane aromatiza-tion rate when the platinum content of their alumina-supported catalyst increased from 0.10 to 0.60%. At the same time, the rate of methylcyclo-pentane ring expansion remained constant. This result also serves as evidence for metal-catalyzed aromatization over dual-function catalysts without the participation of any Cg cyclic intermediate. The cyclization activity of platinum itself was independent of the nature of the support (109). Pure acidic cyclization prevailed with olefin feed (30, 109). 

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