Abdilla, R.M. (2010) A Kinetic Study on the Acid-catalyzed Conversion of D-Fructose to 5-Hydroxymethylfurfural and Levulinic Acid in Aqueous Solutions. Master's Thesis / Essay, Chemistry.
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Abstract
5-hydroxymethylfurfural (HMF) and levulinic acid (LA) have been identified as versatile green platform chemicals from renewable sources. HMF and LA are accessible by the acid-catalyzed dehydration of C6-sugars. As part of a broader kinetic scheme for the production of HMF and LA from biomass, we here report a kinetic study on the conversion of D-fructose into HMF and LA in aqueous solutions using sulfuric acid as the catalyst. The kinetic experiments were performed in a batch reactor in a temperature window of 140 − 180 °C, sulfuric acid concentrations between 0.005 − 1 M and initial D-fructose concentrations in the ranging of 0.1 – 1 M. A kinetic model of the reaction sequence was developed using the power-law approach imcluding by-product (insoluble polymers called humins) formation. A good fit between experimental data and model was achieved. Model predictions indicate that the highest HMF and LA yield are 53 and 74 mol %, respectively. Both were obtained at an initial fructose concentration of 0.1 M, sulfuric acid concentration of 0.01 M (HMF) and 1 M (LA), and temperature of 180 oC (HMF) and 140 oC (LA). ONLY ABSTRACT AVAILABLE, NO FULL TEXT.
| Item Type: | Thesis (Master's Thesis / Essay) |
|---|---|
| Degree programme: | Chemistry |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 15 Feb 2018 07:45 |
| Last Modified: | 15 Feb 2018 07:45 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/9500 |
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