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• W2022419335 abstract "A Single-Event MicroKinetic (SEMK) model was constructed for the Methanol to Hydrocarbon (MTH) reaction on ZSM-23 with a Si/Al ratio of 26. The experimental data were acquired at 400 °C, atmospheric pressure using space times between 19.2 and 57.7 kgcat smol−1. Starting from a previously established fundamental reaction mechanism for MTH on ZSM-5, an extended reaction network, also involving primary carbenium ion alkylation/cracking reactions, was considered. The reaction network in terms of elementary steps for di-methyl ether (DME) and olefins formation from the aromatic hydrocarbon pool as well as from the alkene homologation cycle was implemented. The single-event concept together with thermodynamic constraints allowed to reduce the number of adjustable parameters to 33, from which only 2 activation energies for (s,p) and (t,p) alkylation/cracking, 6 alkene protonation heats, the total concentration of aromatic hydrocarbon pool and the stability difference between secondary and primary carbenium ion had to be determined by regression. The model explains well the product distribution with physically realistic parameter values. The estimated alkene protonation heats increase from 10.4 kJ mol−1 for ethene to 64.1 kJ mol−1 for hexene. A contribution analysis indicated that the alkene-homologation cycle is the dominant reaction pathway for olefins formation on ZSM-23." @default.
• W2022419335 created "2016-06-24" @default.
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• W2022419335 date "2013-10-01" @default.
• W2022419335 modified "2023-09-22" @default.
• W2022419335 title "Single-Event MicroKinetics (SEMK) for Methanol to Hydrocarbons (MTH) on H-ZSM-23" @default.
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• W2022419335 doi "https://doi.org/10.1016/j.cattod.2013.02.017" @default.
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