Catalytic transformation of ethanol into acetone using copper-pyrochlore catalysts

被引:41
作者
Bussi, J [1 ]
Parodi, S
Irigaray, B
Kieffer, R
机构
[1] Fac Quim, Lab Fisicoquim Superficies, Montevideo 2124, Uruguay
[2] ECPM, CNRS, UMR 7515, Lab Etud React Catalyt Surfaces & Interfaces, Strasbourg, France
关键词
copper; lanthanum oxide; pyrochlores; ethanol; acetone; acidic and basic properties;
D O I
10.1016/S0926-860X(98)00106-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Gas phase conversion of ethanol-water mixtures on copper-based catalysts leads to a significant yield of acetone. Copper catalysts containing lanthanum oxide stabilized with zirconia, in the form of the so-called La2Zr2O7 pyrochlore compound, exhibit the best performance for the selective conversion of ethanol into acetone with yields of 96% of the stoichiometric amount at 400 degrees C. Acid-base properties of the pyrochlore in addition to its higher specific surface area and copper dispersion can explain the better catalytic behavior in comparison to the other tested copper catalysts. The most plausible reaction mechanism involves ethanol dehydrogenation to acetaldehyde followed by oxidation to acetic acid and further ketonisation to yield acetone. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:117 / 129
页数:13
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