Journal of the Chemical Society - Faraday Transactions p. 3659 - 3664 (1990)
Update date:2022-08-11
Topics:
Miyata, Hisashi
Tokuda, Shoji
Ono, Takehiko
Ohno, Takashi
Hatayama, Fumikazu
Decomposition of propan-2-ol over zirconia with various Mo loadings and the surface structure of these catalysts have been studied by FTIR spectroscopy and by using a closed-circulation system.MOZ3.0 catalyst (MoO3 3.0 wt percent) shows high selectivity to acetone, while catalysts with high MoO3 loading (> 7.5 wt percent of MoO3) show high selectivity to propene.The FTIR spectra of MOZ3.0 are influenced drastically by the adsorption of propan-2-ol and water.Catalysts under the reaction conditions employed exhibit spectra very different from those of calcined samples.The quantitative FTIR characterization of catalysts has shown that t here are two types of Mo=O species present in MOZ7.5, while MOZ3.0 is composed mainly of a single Mo=O species.The reactivity of surface Mo=O species varies with MoO3 loading.
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