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- W2092393026 abstract "The reforming of C6 hydrocarbons on Pt/Mg(Al)O, Pt/K-L, Pd/Mg(Al)O, and Pt-Re/Al2O3 (sulfided and unsulfided forms) has been investigated using the temporal analysis of products (TAP) reactor. Pulse experiments with several different pure C6 feeds were performed in a continuous flow of H2 at a pressure of 1 bar and temperatures between 400 and 510°C. Under these conditions the reaction network for all of the catalysts appeared to occur by a monofunctional metal pathway: methylpentane → methylcyclopentane → n-hexane → benzene. Evidence of partially dehydrogenated linear C6 molecules as intermediates between n-hexane and benzene was also obtained. Turnover frequencies and benzene selectivities for the Pt/Mg(Al)O and the Pt/KL catalysts were comparable. For the Pd/Mg(Al)O catalyst the selectivity to benzene was higher and the turnover frequency was lower. Because the TAP technique reflects only the activity of truly active catalytic sites, the turnover frequencies from this study (10-12 sec−1 at 425°C on Pt) are higher than generally reported in the literature. Previous investigations of the Pt-Re/Al2O3 catalyst under industrial conditions have shown that the bifunctional mechanism was dominant. The monofunctional mechanism found here implies the existence of two dehydrocyclization pathways on these catalysts: a monofunctional metal pathway favored at low pressures, and a bifunctional pathway which is dominant at higher pressures." @default.
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- W2092393026 date "1994-06-01" @default.
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- W2092393026 title "A TAP Reactor Investigation of C6 Reforming on Nonacidic and Acidic Supported Metal Catalysts" @default.
- W2092393026 doi "https://doi.org/10.1006/jcat.1994.1172" @default.
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