Journal
CATALYSTS
Volume 10, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/catal10010073
Keywords
furfural; furoic acid; gold; hydrotalcite; oxidation
Categories
Funding
- French National Research Agency (ANR) within the frame of the 'Future Investments' program (PIA) [ANR-11-EQPX-0037]
- European Union, through the ERDF
- Centrale Lille
- CNRS
- Lille University
- Centrale Initiatives Foundation
- Chevreul Institute [FR 2638]
- Ministere de l'Enseignement Superieur, de la Recherche et de l'Innovation
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Selective oxidation of furfural to furoic acid was performed with pure oxygen in aqueous phase under mild conditions and uncontrolled pH using hydrotalcite-supported gold nanoparticles as catalyst. Hydrotalcites with different Mg: Al ratios were tested as support. The effects of reaction time, temperature and furfural/catalyst ratio were evaluated. The catalyst Au/HT 4:1 showed the highest activity and selectivity to the desired product, achieving a complete conversion of furfural to furoic acid after 2 h at 110 degrees C. Further, stability tests were carried out in a continuous stirred-tank reactor and a progressive deactivation of the catalyst due to the leaching of Mg2+ cations from the support inducing changes in the pH of the reaction medium was observed.
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