Zeolite H-USY for the production of lactic acid and methyl lactate from C3-sugars |
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| Authors: | Ryan M West Martin Spangsberg Holm Shunmugavel Saravanamurugan Jianmin Xiong Zachary Beversdorf Esben Taarning Claus Hviid Christensen |
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| Affiliation: | 1. University of Wisconsin-Madison, Department of Chemical and Biological Engineering, Madison, WI 53706, USA;2. Center for Sustainable and Green Chemistry, Department of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark;3. Iowa State University, Department of Chemical and Biological Engineering, Ames, IA 50011, USA;4. Haldor Topsøe A/S, Nymøllevej 55, DK-2800, Denmark;1. College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Kexue Road, Zhengzhou 450001, PR China;2. State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China;1. Centre for Surface Chemistry and Catalysis, University of Leuven (KU Leuven), Kasteelpark Arenberg 23, 3001 Heverlee, Belgium;2. Unit of Nanomaterial Chemistry (CNano), University of Namur (UNAMUR), Department of Chemistry, Rue de Bruxelles 61, 5000 Namur, Belgium;1. Nicolaus Copernicus University in Torun, Faculty of Chemistry, 7 Gagarina Str., 87-100 Torun, Poland;2. Adam Mickiewicz University in Poznan, Faculty of Chemistry, 89b Umultowska Str., 61-614 Poznan, Poland;3. Kent State University Kent, Department of Chemistry and Biochemistry, OH 44242, USA |
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| Abstract: | Lactic acid is an interesting platform chemical with many promising applications. This includes the use as a building block for the production of biodegradable plastics and environmentally friendly solvents. A study of the liquid-phase conversion of the triose-sugars, glyceraldehyde and dihydroxyacetone directly to methyl lactate and lactic acid catalyzed by inexpensive commercially available zeolites is presented. One particular zeolite, H-USY (Si/Al = 6) is shown to be quite active with near quantitative yields for this isomerization. Deactivation of the H-USY-zeolite was studied by correlating the catalytic activity to data obtained by TPO, XRD, N2-sorption, and NH3-TPD on fresh and used catalysts. Coking and irreversible framework damage occurs when lactic acid is produced under aqueous conditions. In methanol, methyl lactate is produced and catalyst deactivation is suppressed. Additionally, reaction rates for the formation of methyl lactate in methanol are almost an order of magnitude higher as compared to the rate of lactic acid formation in water. |
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