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- W2892832111 abstract "The effect of MFI zeolite morphology (2D-nanosheets vs conventional 3D structure) on ethanol dehydration was probed by FTIR operando spectroscopy. Simultaneous examination of turnover rates and Brønsted acid sites coverage under different reaction conditions allowed determining activation energies for monomolecular and bimolecular dehydration pathways, as well as thermodynamic parameters (ΔHads and ΔSads) for the adsorption of the most abundant surface species (i.e., ethanol monomers and dimers). The catalytic results showed smaller first-order activation energy (Efirst) for 2D-MFI (Efirst = 16 ± 4 kJ mol–1) nanosheets vs 3D-MFI (Efirst = 41 ± 1 kJ mol–1) and similar zero-order activation energies (Ezero) for both 2D- (Ezero = 117 ± 4 kJ mol–1) and 3D-MFI (Ezero = 124 ± 1 kJ mol–1). Correlating the kinetic and thermodynamic parameters revealed that the difference in stabilization of adsorbed ethanol monomers and dimers is the origin behind the differences in the intrinsic activities of 2D- and 3D-MFI zeolites which is reflected in the corresponding zero-order activation entropies (ΔS‡zero)." @default.
- W2892832111 created "2018-10-05" @default.
- W2892832111 creator A5022925375 @default.
- W2892832111 creator A5091575774 @default.
- W2892832111 date "2018-09-26" @default.
- W2892832111 modified "2023-10-06" @default.
- W2892832111 title "IR Operando Study of Ethanol Dehydration over MFI Zeolites: Structure–Activity Relationships" @default.
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- W2892832111 doi "https://doi.org/10.1021/acs.jpcc.8b05697" @default.
- W2892832111 hasPublicationYear "2018" @default.
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