Catalytic transformation of ethanol into acetone using copper–pyrochlore catalysts

Bussi, Juan; Parodi, Silvio; Irigaray, Bruno; Kieffer, R.

doi:10.1016/s0926-860x(98)00106-9

Cited by 45 publications

(21 citation statements)

References 33 publications

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“…127,128 Subsequently, the formed carboxylic acids can also condensate into ketones with liberation of CO 2 (Scheme 5, reaction 7). 106,107,129,130 As…”

Section: Catalysis Science and Technology Minireviewmentioning

confidence: 99%

Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization

Gabriëls

Hernández

Sels

et al. 2015

Catal. Sci. Technol.

240

233

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The Guerbet condensation reaction is an alcohol coupling reaction that has been known for more than a century. Because of the increasing availability of bio-based alcohol feedstock, this reaction is of growing importance and interest in terms of value chains of renewable chemical and biofuel production. Due to the specific branching pattern of the alcohol products, the Guerbet reaction has many interesting applications. In comparison to their linear isomers, branched-chain Guerbet alcohols have extremely low melting points and excellent fluidity. This review provides thermodynamic insights and unravels the various mechanistic steps involved. A comprehensive overview of the homogeneous, heterogeneous and combined homogeneous and heterogeneous catalytic systems described in published reports and patents is also given. Technological considerations, challenges and perspectives for the Guerbet chemistry are discussed.

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“…127,128 Subsequently, the formed carboxylic acids can also condensate into ketones with liberation of CO 2 (Scheme 5, reaction 7). 106,107,129,130 As…”

Section: Catalysis Science and Technology Minireviewmentioning

confidence: 99%

Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization

Gabriëls

Hernández

Sels

et al. 2015

Catal. Sci. Technol.

240

233

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“…As ZnO is more basic than ZrO 2 , [40] it is possible that addition of ZnO increases the basicity of the support, which can subsequently increase the base-catalyzed acetaldehyde condensation to form acetone, with CO being a 1682 www.chemsuschem.org co-product. Therefore, an increase in CO selectivity could be expected for the 8Co0.8Zn/ZrO 2 catalyst.…”

Section: Reactivity Measurementsmentioning

confidence: 99%

The Effect of Zinc Addition on the Oxidation State of Cobalt in Co/ZrO₂ Catalysts

et al. 2011

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The effect of zinc promotion on the oxidation state of cobalt in Co/ZrO(2) catalysts was investigated and correlated with the activity and selectivity for ethanol steam reforming (ESR). Catalysts were synthesized by applying incipient wetness impregnation and characterized by using Brunauer-Emmett-Teller (BET), temperature-programmed reduction (TPR) measurements, X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Higher ethanol conversion and lower CH(4) selectivity are observed for the Co/ZrO(2) catalyst promoted with Zn as compared to the Co/ZrO(2) catalyst alone. Addition of Zn inhibits the oxidation of metallic cobalt (Co(0) ) particles and results in a higher ratio of Co(0) /Co(2+) in the Zn-promoted Co/ZrO(2) catalyst. These results suggest that metallic cobalt (Co(0) ) is more active than Co(2+) in the ethanol conversion through dehydrogenation and that Co(2+) may play a role in the CH(4) formation. TPR measurements, on the other hand, reveal that Zn addition inhibits the reduction of Co(2+) and Co(3+) , which would lead to the false conclusion that oxidized Co is required to reduce the CH(4) formation. Therefore, TPR measurements may not be appropriate to correlate the degree of metal reducibility (in this case Co(0)) with the catalyst activity for reactions, such as ESR, where oxidizing conditions exist.

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“…It could be obtained by decarboxilation of acetate species at high temperature [27]. Between 495 and 655 • C, H 2 and CO 2 desorption was detected, while acetone and diethyl-ether decreased.…”

Section: Ethanol Tpdmentioning

confidence: 99%

The role of surface reactions on the active and selective catalyst design for bioethanol steam reforming

Benito

Padilla

Serrano-Lotina

et al. 2009

Journal of Power Sources

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Catalytic transformation of ethanol into acetone using copper–pyrochlore catalysts

Cited by 45 publications

References 33 publications

Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization

Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization

The Effect of Zinc Addition on the Oxidation State of Cobalt in Co/ZrO₂ Catalysts

The role of surface reactions on the active and selective catalyst design for bioethanol steam reforming

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Catalytic transformation of ethanol into acetone using copper–pyrochlore catalysts

Cited by 45 publications

References 33 publications

Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization

Review of catalytic systems and thermodynamics for the Guerbet condensation reaction and challenges for biomass valorization

The Effect of Zinc Addition on the Oxidation State of Cobalt in Co/ZrO2 Catalysts

The role of surface reactions on the active and selective catalyst design for bioethanol steam reforming

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The Effect of Zinc Addition on the Oxidation State of Cobalt in Co/ZrO₂ Catalysts