Ternary
multifunctional A1ZnyZrzOn catalysts are prepared by introducing A-site transition
metals with the redox capability into binary Zn1Zr8On.
Structure and morphology were investigated by means of XRD, BET and FESEM, respectively.
Activity data showed that Cr addition exhibited obvious beneficial effect to
promote isobutene production from direct conversion of bio-ethanol compared to
other A-site metal dopants. A significant higher yield of isobutene over
Cr-promoted Zn1Zr8On catalyst was also observed
with respect to its binary Zn1Zr8On counterpart. The choice of A-site metal is of prime importance in the isobutene
production, catalyzing mainly the ethanol dehydrogenation, meanwhile the appropriate
addition of zinc on the catalyst surface is also essential for good isobutene yield.
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