Exploratory Catalyst Screening Studies on the Base Free Conversion of Glycerol to Lactic Acid and Glyceric Acid in Water Using Bimetallic Au–Pt Nanoparticles on Acidic Zeolites
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The base free oxidation of glycerol with molecular oxygen in water using bimetallic Au–Pt catalysts on three different acidic zeolite supports (H-mordenite, H-β and H-USY) was explored in a batch setup. At temperatures between 140 and 180 °C, lactic acid formation was significant and highest selectivity (60 % lactic acid at 80 % glycerol conversion) was obtained using Au–Pt/USY-600 (180 °C). A selectivity switch to glyceric acid (GLYA) was observed when the reactions were performed at 100 °C. Highest conversion and selectivity towards GLYA were obtained with Au–Pt/H-β as the catalyst (68 % selectivity at 68 % conversion).
KeywordsGold catalysts Glycerol Lactic acid Zeolites Oxidation
The authors would like to thank NWO-ASPECT (The Netherlands) for financial support (ASPECT-project 053.62.020). Gert ten Brink and J. van der Velde (Faculty of Mathetatics and Natural science, University of Groningen) are acknowledged for the TEM and ICP-OES mesurements respectively. PQ-zeolyst is acknowledged for kindly supplying the commercial zeolites.
- 7.Pagliaro M, Rossi M (2008) The future of glycerol: new uses of a versatile raw material. RSC publishing, CamridgeGoogle Scholar
- 9.Carrettin S, McMorn P, Johnston P, Griffin K, Hutchings GJ (2002) Chem Commun 696–697Google Scholar
- 25.Tongsakul D, Nishimura S, Ebitani K, ACS Catal (2013) 3:2199–2207Google Scholar
- 28.Villa A, Veith GM, Prati L (2010) Angew Chem. Int Ed 49:4499–4502Google Scholar