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Gold catalysts screening in base-free aerobic oxidation of glucose to gluconic acid

AuthorsMegías-Sayago, Cristina; Ivanova, Svetlana CSIC ORCID; López-Cartes, C.; Centeno, Miguel Ángel CSIC ORCID; Odriozola, José Antonio CSIC ORCID
KeywordsGold catalysts
Gluconic acid
Base free oxidation
Glucose oxidation
Issue Date2017
CitationCatalysis Today 279: 148- 154 (2017)
AbstractBase-free aerobic oxidation of glucose in presence of Au/AlO, Au/CeO, Au/CeO(20 wt%)/AlO, Au/CeO(25 wt%)/ZrO and Au/CeO(50 wt%)/ZrO catalysts using molecular oxygen at atmospheric pressure is studied. Within the whole series high conversion and selectivity to gluconic acid are observed after 18 h of reaction at 120 °C. The activity and especially the selectivity changes are related to the support nature in a way that the higher the Lewis acidity of the support the lower the selectivity to gluconic acid and the higher the production of lactic acid. The highest yield to gluconic acid is obtained over Au/AlO for which the influence of the reaction time, temperature and stirring rate are further evaluated and discussed.
Identifiersdoi: 10.1016/j.cattod.2016.06.046
issn: 0920-5861
Appears in Collections:(ICMS) Artículos
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