(576c) Oxidative Dehydrogenation of Butenes over Co9Fe3Bi1Mo12O51@ZnFe2O4 Catalyst: Effect of Carbon Layer

Authors: 
Li, X., Zhejiang University
Cheng, D. G., Zhejiang University
Chen, F., Zhejiang University
Zhan, X., Zhejiang University

 

   
1,3-Butadiene, a major feedstock for synthetic rubber, can be obtained from two
processes. One is the cracking and separation of light component in petroleum.
Another is the oxidative dehydrogenation (ODH) of butenes. ZnFe2O4
and Co9Fe3Bi1Mo12O51 are
deemed as effective catalysts for the latter one, among which Co9Fe3Bi1Mo12O51
exhibits higher reactivity in ODH of 1-butene while ZnFe2O4
in ODH of 2-butene. A synergistic effect by packing above two catalysts with
certain sequence was achieved and it can improve the total yield of
1,3-butadiene from mixed-butenes. In this regard, to fabricate these two catalysts
into one with ordered structure can be expected to be more efficient in ODH of
butenes. In this work, a core-shell structured catalyst (referred as Co9Fe3Bi1Mo12O51
@C@ ZnFe2O4) were successfully synthesized and investigated
in ODH reaction, as shown in the figure below. Carbon material was employed as
intermediate in order to enlarge
the specific surface area of exterior metal oxide
. The results demonstrate
that the yield of 1-butene over Co9Fe3Bi1Mo12O51
increase from 73% to 78% with one layer carbon coating, while that of over Co9Fe3Bi1Mo12O51
@C@ ZnFe2O4 from 70% to 72% comparing with ZnFe2O4.
With carbon intermediate involved, the better catalytic performance can be
obtained and the synergistic effect was also proved with mixed-butenes.

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Corresponding author. Tel.: +86 571 8795 2728, Fax:
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E-mail address: fqchen@zju.edu.cn (F.Q. Chen)