Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions
This study reports the reaction mechanism and kinetics of glucose hydrothermal decomposition in hot-compressed gamma-valerolactone(GVL)/water (HCGW) at 175–225 °C and various GVL concentrations (0–75 vol%) for the production of biofuels and value-added biochemicals. Increasing GVL addition tunes glu...
| Main Authors: | , , |
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| Format: | Journal Article |
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Elsevier Ltd
2019
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0016236118317782 http://hdl.handle.net/20.500.11937/72759 |
| _version_ | 1848762834906775552 |
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| author | Song, B. Yu, Yun Wu, Hongwei |
| author_facet | Song, B. Yu, Yun Wu, Hongwei |
| author_sort | Song, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study reports the reaction mechanism and kinetics of glucose hydrothermal decomposition in hot-compressed gamma-valerolactone(GVL)/water (HCGW) at 175–225 °C and various GVL concentrations (0–75 vol%) for the production of biofuels and value-added biochemicals. Increasing GVL addition tunes glucose decomposition from isomerization into fructose and mannose to dehydration into 5-hydroxymethylfurfural (5-HMF) and levoglucosan (LGA). Particularly, direct dehydration of glucose to 5-HMF is found to be a primary reaction during glucose decomposition in HCGW. With the GVL concentration increasing from 1 to 75%, the selectivities of dehydration reactions to 5-HMF and LGA at 175 °C increase from 22 and 12% to 30 and 33%, respectively, while the selectivity of isomerization reaction to fructose at 175 °C decreases from 46 to 20%. Kinetic analysis indicates that glucose decomposition in HCGW follows first-order reaction kinetics. Further analysis shows that the reaction rate constants of dehydration reactions almost increase linearly with the GVL concentration, while those of isomerization reactions almost decrease linearly with the GVL concentration. The activation energy of glucose decomposition in HCGW also reduces slightly from 117 kJ/mol in water to 96 kJ/mol in 75% GVL. This study demonstrates that GVL/water co-solvent is effective to tune the glucose decomposition reaction for the production of biofuels and value-added biochemicals. |
| first_indexed | 2025-11-14T10:53:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-72759 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:53:52Z |
| publishDate | 2019 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-727592019-02-12T03:29:20Z Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions Song, B. Yu, Yun Wu, Hongwei This study reports the reaction mechanism and kinetics of glucose hydrothermal decomposition in hot-compressed gamma-valerolactone(GVL)/water (HCGW) at 175–225 °C and various GVL concentrations (0–75 vol%) for the production of biofuels and value-added biochemicals. Increasing GVL addition tunes glucose decomposition from isomerization into fructose and mannose to dehydration into 5-hydroxymethylfurfural (5-HMF) and levoglucosan (LGA). Particularly, direct dehydration of glucose to 5-HMF is found to be a primary reaction during glucose decomposition in HCGW. With the GVL concentration increasing from 1 to 75%, the selectivities of dehydration reactions to 5-HMF and LGA at 175 °C increase from 22 and 12% to 30 and 33%, respectively, while the selectivity of isomerization reaction to fructose at 175 °C decreases from 46 to 20%. Kinetic analysis indicates that glucose decomposition in HCGW follows first-order reaction kinetics. Further analysis shows that the reaction rate constants of dehydration reactions almost increase linearly with the GVL concentration, while those of isomerization reactions almost decrease linearly with the GVL concentration. The activation energy of glucose decomposition in HCGW also reduces slightly from 117 kJ/mol in water to 96 kJ/mol in 75% GVL. This study demonstrates that GVL/water co-solvent is effective to tune the glucose decomposition reaction for the production of biofuels and value-added biochemicals. 2019 Journal Article http://hdl.handle.net/20.500.11937/72759 10.1016/j.fuel.2018.10.065 http://www.sciencedirect.com/science/article/pii/S0016236118317782 Elsevier Ltd restricted |
| spellingShingle | Song, B. Yu, Yun Wu, Hongwei Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions |
| title | Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions |
| title_full | Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions |
| title_fullStr | Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions |
| title_full_unstemmed | Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions |
| title_short | Tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: From isomerization to dehydration reactions |
| title_sort | tuning glucose decomposition in hot-compressed gamma-valerolactone/water mixtures: from isomerization to dehydration reactions |
| url | http://www.sciencedirect.com/science/article/pii/S0016236118317782 http://hdl.handle.net/20.500.11937/72759 |