Abstract
13C MAS NMR study of the early stages of propane 2-13C activation was performed over H-ZSM-5 catalysts with various content of protonic and aprotonic sites. The reaction mechanism was tested by addition of various probe-molecules (C3H6, C6H6, H2, H2O and CO). The results on tracing the fate of 13C label during this experiments conclude to a monofunctional mechanism involving propane protonation on the strong Brønsted sites of H-ZSM-5 and the formation of carbonium ion type transition states, which further evolve in four different ways leading to 13C scrambling in propane, cracking, dehydrogenation and disproportionation.
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Ivanova, I.I., Pomakhina, E.B., Rebrov, A.I. et al. 13C MAS NMR mechanistic study of the initial stages of propane activation over H-ZSM-5 zeolite. Topics in Catalysis 6, 49–59 (1998). https://doi.org/10.1023/A:1019139111671
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DOI: https://doi.org/10.1023/A:1019139111671