Microwave-assisted conversion of simple sugars and waste coffee grounds into 5-Hydroxymethylfurfural in a highly aqueous DMSO solvent system catalyzed by a combination of Al(NO3)3 and H2SO4
5-Hydroxymethylfurfural (HMF), an organic platform chemical, used as a precursor of various industrial chemicals, was synthesized from waste coffee grounds (WCG), glucose, and fructose, using Al(NO3)3 and H2SO4 as catalysts, in a highly aqueous binary solvent system consisting of water and dimethyl...
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| Main Authors: | , , |
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| Format: | text |
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Animo Repository
2019
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| Online Access: | https://animorepository.dlsu.edu.ph/faculty_research/3640 https://animorepository.dlsu.edu.ph/context/faculty_research/article/4642/type/native/viewcontent/acs.iecr.9b03000 |
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| Institution: | De La Salle University |
| Summary: | 5-Hydroxymethylfurfural (HMF), an organic platform chemical, used as a precursor of various industrial chemicals, was synthesized from waste coffee grounds (WCG), glucose, and fructose, using Al(NO3)3 and H2SO4 as catalysts, in a highly aqueous binary solvent system consisting of water and dimethyl sulfoxide (DMSO) and a conventional microwave as the heating system. The effect of tuning the water/DMSO ratio was first studied. Results showed that the highest HMF yield can be obtained using 6:4, 5:5, and 7:3 water/DMSO ratios for WCG, glucose, and fructose, respectively. A response surface methodology was also employed to determine the interactions among catalyst loading, reaction time, and microwave power and their effects HMF yield. Yields of up to 13.65% (WCG), 28.50% (glucose), and 60.8% (fructose) were observed. This study demonstrates the use of WCG as an HMF precursor and the tuning of several experimental factors to increase the HMF yield from simple sugars and WCG. © 2019 American Chemical Society. |
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