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

Bright T. Kusema; Betiana C. Campo; Päivi Mäki-Arvela; Tapio Salmi; Dmitry Yu Murzin

doi:10.1016/j.apcata.2010.07.037

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

Bright T. Kusema, Betiana C. Campo, Päivi Mäki-Arvela, Tapio Salmi, Dmitry Yu Murzin

Research output: Contribution to journal › Article › Scientific › peer-review

32 Citations (Scopus)

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 E_a for the selective oxidation of arabinose to arabinonic acid was 23.8 kJ mol^-1 based on the temperature dependence of the experimental data.

Original language	English
Pages (from-to)	101-108
Number of pages	8
Journal	Applied Catalysis A: General
Volume	386
Issue number	1-2
DOIs	https://doi.org/10.1016/j.apcata.2010.07.037
Publication status	Published - 30 Sept 2010
MoE publication type	A1 Journal article-refereed

Keywords

Arabinose
Electric chemical potential
Gold catalysts
Oxidation

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10.1016/j.apcata.2010.07.037

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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.",

keywords = "Arabinose, Electric chemical potential, Gold catalysts, Oxidation",

author = "Kusema, {Bright T.} and Campo, {Betiana C.} and P{\"a}ivi M{\"a}ki-Arvela and Tapio Salmi and Murzin, {Dmitry Yu}",

note = "Funding Information: This work is part of the activities at the {\AA}bo Akademi University Process Chemistry Centre within the Finnish Centre of Excellence Program (2000–2011) appointed by the Academy of Finland. Krisztian Kordas, Anne-Riikka Leino (University of Oulu) and Sten Lindholm ({\AA}bo Akademi University) are gratefully acknowledged for their help in the catalyst characterization. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.apcata.2010.07.037",

language = "English",

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AU - Kusema, Bright T.

AU - Campo, Betiana C.

AU - Mäki-Arvela, Päivi

AU - Salmi, Tapio

AU - Murzin, Dmitry Yu

N1 - Funding Information: This work is part of the activities at the Åbo Akademi University Process Chemistry Centre within the Finnish Centre of Excellence Program (2000–2011) appointed by the Academy of Finland. Krisztian Kordas, Anne-Riikka Leino (University of Oulu) and Sten Lindholm (Åbo Akademi University) are gratefully acknowledged for their help in the catalyst characterization. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2010/9/30

Y1 - 2010/9/30

N2 - 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.

AB - 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.

KW - Arabinose

KW - Electric chemical potential

KW - Gold catalysts

KW - Oxidation

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DO - 10.1016/j.apcata.2010.07.037

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EP - 108

JO - Applied Catalysis A: General

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ER -

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

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