| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 40531 | Applied Catalysis A: General | 2013 | 6 Pages |
Sorbitol and xylitol dehydration reactions have been investigated regarding their kinetic properties. The reactions were catalyzed by silicotungstic acid in water under hydrogen pressure at temperatures ranging from 160 °C to 200 °C. The products have been measured by HPLC at regular intervals and reaction models have been developed based on these results. Modeling of the experimental data has been done with Presto-Kinetics® and the resulting reaction rates have been used to determine activation energies of all involved reaction steps. By this way, a set of four activation energies was obtained for the dehydration of sorbitol to its products, including 1,4-sorbitan and isosorbide. The activation energy for the dehydration of xylitol to 1,4-anhydroxylitol could also be obtained.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (293 K)Download as PowerPoint slideHighlights► Kinetic behavior of sorbitol and xylitol dehydration was investigated. ► Differential equations for modeling sorbitol and xylitol dehydration were proposed. ► Reaction rates at different temperatures could be obtained. ► Activation energies for all reaction steps were successfully calculated. ► Selectivity of sorbitol dehydration could be influenced by temperature.
