Chemat, Aziade and Schweiger, Moritz and Touraud, Didier and Mueller, Rainer and Lajoie, Leo and Mazzitelli, Jean Baptiste and Cravotto, Christian and Kunz, Werner and Fabiano-Tixier, Anne-Sylvie (2024) Cascade extractions of coffee silverskin: Towards zero solid waste valorization of a byproduct. SUSTAINABLE CHEMISTRY AND PHARMACY, 42: 101779. ISSN 2352-5541
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In a former study it was shown that extracting cycles of coffee silverskin using the previous water extract as solvent with fresh material, results in a caffeine-rich aqueous extract and insoluble fibers. In the present work, we observed that: (1) the concentration in sugar, electrolytes, chlorogenic, ferulic, caffeic acid and antioxidant power increases in the water fraction during the extraction cycles. As a remarkable result the ratios of caffeine to sugar, polyphenols and antioxidant power remains also constant; (2) lignin- and cellulose-rich insoluble fibers can be solubilized using successively the green solvents gamma-valerolactone and N-methylmorpholine N-oxide. Using cascade extractions, it is possible to separate and recover all constituents of coffee silverskin as solid substances as well as liquid fractions, making it possible to leave no solid waste behind.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GAMMA-VALEROLACTONE; LIGNIN; ACID; HEMICELLULOSE; TRIGONELLINE; DEGRADATION; COMPONENTS; BIOMASS; Coffee silverskin; Water extraction; Gamma-valerolactone; N-oxide-N-Methylmorpholine; Lignin extraction; Cellulose extraction; Fibers; Pulping |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Oct 2025 05:54 |
| Last Modified: | 30 Oct 2025 05:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64437 |
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