Combining Chemical and Biological Catalysis for the Conversion of Hemicelluloses: Hydrolytic Hydrogenation of Xylan to Xylitol
| Autor: | Mick Miro Ayubi, Thomas Walther, Rüdiger Lange, Arne Pospiech, Gerd Hilpmann, Susanne Steudler, Thomas Bley |
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| Rok vydání: | 2018 |
| Předmět: |
010405 organic chemistry
Xylan (coating) food and beverages General Chemistry 010402 general chemistry Xylitol 01 natural sciences Catalysis 0104 chemical sciences carbohydrates (lipids) Hydrolysis chemistry.chemical_compound chemistry Scientific method Organic chemistry Fermentation Sugar Organometallic chemistry |
| Zdroj: | Catalysis Letters. 149:69-76 |
| ISSN: | 1572-879X 1011-372X |
| Popis: | The conversion of xylan to xylitol is commonly realized via the two separate process steps hydrolysis and hydrogenation (or fermentation). Recent research activities aim at developing one-pot processes to facilitate this conversion to save resources and operation time. To avoid hazardous chemicals like liquid acids for the initial xylan hydrolysis, enzymes are a suitable green alternative. A series of experiments are discussed wherein process conditions for chemical conversion were adjusted to more enzyme-friendly reaction conditions to overcome xylose-induced product inhibition by direct hydrogenation of sugar to xylitol. A novel combination of enzymes and precious metal catalyst (Ru/C) in an one-pot process is demonstrated. Based on these results, limiting factors and potentially advantageous process parameters as well as catalyst combinations are discussed. |
| Databáze: | OpenAIRE |
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