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- W2387204911 abstract "A series of Cu-based catalysts modified with alkali metal M(M=Li,Na,K,Cs) was prepared via wet impregnation method.The loading of copper was fixed at 5%(mass fraction);the molar ratio of copper to alkali metal was 5 ∶1.The catalysts were used in the dehydrogenation of cyclohexanol to elucidate the effects of the additives on the catalytic properties of copper.The catalysts were characterized by means of XRD,BET,H2-TPR,NH3-TPD and CO2-TPD.The results indicate that the statuses of copper oxide species on the modified catalysts were changed.The number of acidic sites on the modified catalysts surface was decreased.Accordingly,the selectivity of cyclohexene was remarkably decreased and the selectivity of cyclohexanone was increased(99%).The Cu-K/SiO2 catalyst showed a highly catalytic activity and a highly selectivity of cyclohexanone.The interaction between copper and K additive prevented the growing up of copper,and improved the stability of catalyst." @default.
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- W2387204911 date "2007-01-01" @default.
- W2387204911 modified "2023-09-24" @default.
- W2387204911 title "Effects of Alkali Metal Additives on Cu/SiO_2 Catalyst in the Dehydrogenation of Cyclohexanol" @default.
- W2387204911 hasPublicationYear "2007" @default.
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