Ketonisation of carboxylic acids over Zn-Cr oxide in the gas phase

Bayahia, Hossein; Kozhevnikova, Elena F.; Kozhevnikov, Ivan V.

doi:10.1016/j.apcatb.2014.10.028

Cited by 31 publications

(41 citation statements)

References 29 publications

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“…al. 19 that Zn-Cr mixed oxides calcined at > 350 o C exhibited Cr2O3 and ZnCr2O4 spinel crystalline phase.…”

Section: Catalyst Characterizationmentioning

confidence: 93%

“…Crystalline silicalite zeolite 18 and Zn-Cr 19 and its support have been used in the ketonisation of acetic and propionic acids in the gas phase at 300-450 o C 18,19 . Strong proton site catalyst such as heteropoly acid was an active catalyst in the ketonisation of propionic acid in the gas phase 20 .…”

Section: Rcoohmentioning

confidence: 99%

“…Pure oxides of chromium, zinc and mixed oxides of zinc and chromium oxides were prepared by coprecipitation method as previously discussed in literature 19,[21][22][23] . In this method, chromium and zinc nitrates were dissolved in distilled water.…”

Section: Catalyst Synthesismentioning

confidence: 99%

“…This catalyst is mesoporous (between 2 to 50 nm pore diameter) with IV isotherm type. Zn-Cr (10:1) mixed oxide catalyst showed an adsorption isotherm with an H3 hysteresis loop and a mononodal pore size distribution with pore diameter at 94 Ǻ 19 . X-ray diffraction of zinc-chromium catalyst X-ray diffraction for pure zinc and chromium and zinc-chromium mixed oxide catalysts calcined at 300 o C in the presence of N2 shows that rich zinc catalyst is crystalline.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…The catalyst gave 82% of selectivity for 5-nonanone at 86% conversion (70.52% yield) with only 4% of hydrocarbons produced. These hydrocarbons might be C1-C4 or higher alkanes and alkenes 15 obtained by acidcatalysted craking of 5-nonanoe 19 . CO and CO2 were not monitored and the unknown remaining might be some deoxygenates products 19 .…”

Section: Catalyst Aciditymentioning

confidence: 99%

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Zinc-Chromium oxide catalyst for gas-phase ketonisation of pentanoic acid

Alghamdi¹,

Bayahia²

2016

Mediterr.J.Chem.,

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Oxides of Zinc and Chromium mixed catalyst with different atomic ratios of Zinc and Chromium were tested in the ketonisation of pentanoic acid in the gas phase. These catalysts were active to form 5-nonanone, at 300 – 400 oC and ambient pressure. It was found that Zn-Cr with an atomic ratio (10:1) gave the best catalytic performance in comparison with other oxides with higher or lower atomic ratio of Zn and Cr mixed oxides, ZnO and Cr2O3. In this test, Zn-Cr (10:1) gave 82% of selectivity for 5-nonanone as the main product at 86% of conversion of the acid at 350oC. The catalyst showed stable performance at the best selected conditions with a small decrease in acid conversion. For catalyst characterization, BET surface area and porosity technique, X-ray diffraction and DRIFTS of pyridine adsorption were used.

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“…al. 19 that Zn-Cr mixed oxides calcined at > 350 o C exhibited Cr2O3 and ZnCr2O4 spinel crystalline phase.…”

Section: Catalyst Characterizationmentioning

confidence: 93%

Section: Rcoohmentioning

confidence: 99%

Section: Catalyst Synthesismentioning

confidence: 99%

Section: Catalyst Characterizationmentioning

confidence: 99%

Section: Catalyst Aciditymentioning

confidence: 99%

See 3 more Smart Citations

Zinc-Chromium oxide catalyst for gas-phase ketonisation of pentanoic acid

Alghamdi¹,

Bayahia²

2016

Mediterr.J.Chem.,

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Chemistry ofCCBond Formation Reactions Used in Biomass Upgrading: Reaction Mechanisms, Site Requirements, and Catalytic Materials

Bui

Duong

Anaya

et al. 2019

Chemical Catalysts for Biomass Upgrading

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Heterogeneous Catalytic Conversion of Biobased Chemicals into Liquid Fuels in the Aqueous Phase

Chen

et al. 2016

ChemSusChem

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Different biobased chemicals are produced during the conversion of biomass into fuels through various feasible technologies (e.g., hydrolysis, hydrothermal liquefaction, and pyrolysis). The challenge of transforming these biobased chemicals with high hydrophilicity is ascribed to the high water content of the feedstock and the inevitable formation of water. Therefore, aqueous-phase processing is an interesting technology for the heterogeneous catalytic conversion of biobased chemicals. Different reactions, such as dehydration, isomerization, aldol condensation, ketonization, and hydrogenation, are applied for the conversion of sugars, furfural/hydroxymethylfurfural, acids, phenolics, and so on over heterogeneous catalysts. The activity, stability, and reusability of the heterogeneous catalysts in water are summarized, and deactivation processes and several strategies are introduced to improve the stability of heterogeneous catalysts in the aqueous phase.

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Ketonisation of carboxylic acids over Zn-Cr oxide in the gas phase

Cited by 31 publications

References 29 publications

Zinc-Chromium oxide catalyst for gas-phase ketonisation of pentanoic acid

Zinc-Chromium oxide catalyst for gas-phase ketonisation of pentanoic acid

Chemistry ofCCBond Formation Reactions Used in Biomass Upgrading: Reaction Mechanisms, Site Requirements, and Catalytic Materials

Heterogeneous Catalytic Conversion of Biobased Chemicals into Liquid Fuels in the Aqueous Phase

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