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Selective catalytic oxidation of arabinose—A comparison of gold and palladium catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
41912 45904 2010 8 PDF Available
Title
Selective catalytic oxidation of arabinose—A comparison of gold and palladium catalysts
Abstract

Aqueous-phase selective oxidation of arabinose by molecular oxygen was studied in an isothermal shaking reactor at moderate conditions of 50–70 °C and pH 6–9. Different gold and palladium catalysts on metal oxide and carbon supports were tested. High catalyst activity and selectivity to arabinonic acid were achieved with Au/Al2O3 catalyst. Pd catalysts were characterized with low activity and selectivity due to the increase of the amount of by-products. The influence of the kinetic parameters such as pH, temperature, and oxygen flow rate was investigated. In situ catalyst potential measurements during arabinose oxidation gave information about the extent of the oxygen accumulation on the metal surface and a correlation to activity was obtained. The apparent activation energy Ea for the selective oxidation of arabinose to arabinonic acid was 23.8 kJ mol−1 based on the temperature dependence of the experimental data.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (24 K)Download as PowerPoint slideResearch highlights▶ Oxidation of arabinose to arabinonic acid under mild conditions. ▶ High activity and selectivity over gold supported on alumina. ▶ Activation energy 23.8 kJ mol−1.

Keywords
Oxidation; Arabinose; Gold catalysts; Electric chemical potential
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Selective catalytic oxidation of arabinose—A comparison of gold and palladium catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 386, Issues 1–2, 30 September 2010, Pages 101–108
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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