Premium
The Synergistic Effect to Promote the Direct Conversion of Bioethanol into Isobutene over Ternary Multifunctional Cr x Zn y Zr z O n Catalysts
Author(s) -
Liu Feng,
Men Yong,
Wang Jinguo,
Huang Xiaoxiong,
Wang Yuanqiang,
An Wei
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201700154
Subject(s) - catalysis , chemistry , selectivity , dehydrogenation , redox , ternary operation , yield (engineering) , heterogeneous catalysis , base (topology) , inorganic chemistry , mesoporous material , organic chemistry , materials science , mathematical analysis , mathematics , computer science , metallurgy , programming language
A significant beneficial effect of introducing chromium over mesoporous Cr 1 Zn 1 Zr 8 O 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 Zn 1 Zr 8 O 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.