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- Title
The Synergistic Effect to Promote the Direct Conversion of Bioethanol into Isobutene over Ternary Multifunctional Cr<sub> x</sub>Zn<sub> y</sub>Zr<sub> z</sub>O<sub> n</sub> Catalysts.
- Authors
Liu, Feng; Men, Yong; Wang, Jinguo; Huang, Xiaoxiong; Wang, Yuanqiang; An, Wei
- Abstract
A significant beneficial effect of introducing chromium over mesoporous Cr1Zn1Zr8O n oxide composite catalysts was observed in the upgrading and direct conversion of bioethanol into isobutene (ETIB), and a 38 % enhancement in the selectivity (yield) to isobutene was observed relative to that observed with its binary Zn1Zr8O n counterpart. Two critical factors were related to the surface properties of this catalyst: a proper surface acid/base balance and favorable redox properties dictated the selectivity to isobutene. Through combined experimental and theoretical efforts, synergistic effects of redox-active Cr δ+ in promoting the dehydrogenation of ethanol were elucidated and therefore the production of isobutene. This work provides a guide for the rational design of efficient catalysts for a highly active and selective cascade ETIB reaction, for which the relative strengths of the redox/acid and base/acid sites of the catalyst serve as catalytic descriptors.
- Subjects
ETHANOL as fuel; CHROMIUM; CATALYTIC activity; OXIDATION-reduction reaction; SURFACE properties
- Publication
ChemCatChem, 2017, Vol 9, Issue 10, p1758
- ISSN
1867-3880
- Publication type
Article
- DOI
10.1002/cctc.201700154