| Title |
Apple Waste: A Sustainable Source of Carbon Materials and Valuable Compounds |
| ID_Doc |
9152 |
| Authors |
Guardia, L; Suárez, L; Querejeta, N; Madrera, RR; Suárez, B; Centeno, TA |
| Title |
Apple Waste: A Sustainable Source of Carbon Materials and Valuable Compounds |
| Year |
2019 |
| Published |
Acs Sustainable Chemistry & Engineering, 7.0, 20 |
| DOI |
10.1021/acssuschemeng.9b04266 |
| Abstract |
The implementation of sustainable strategies based on the integral valorization of residues is the most efficient way to achieve a profitable circular economy. This comprehensive study highlights the potential of apple waste from juice and cider production as a precursor of porous carbons and provides guidelines to achieve a wide spectrum of physicochemical properties. Hydrothermal carbonization (HTC) of apple bagasse is proposed as a feasible integrated process with zero waste that allows stabilizing this highly pollutant residue in the form of a carbon-enriched solid while extracting valuable compounds in the aqueous phase. The liquid fraction resulting from HTC at 200 degrees C contains a high total phenolic content and antioxidant activity, the major products being catechol (1,2-dihydroxybenzene) and 5-hydroxymethyl-2-furfural (HMF). The successful upgrading of the solid byproduct into porous carbons provides additional advantage for a more cost-effective waste management. It is reported that a simple one-step activation leads to apple- derived carbons with specific surface areas up to 2000 m(2) g(-1) and electrochemical capacitances as high as 260-290 F g(-1). Their excellent performance as supercapacitor electrodes make them very promising for the storage of electrical energy from renewable sources. |
| Author Keywords |
apple waste; biocarbon; porous carbon; hydrothermal carbonization; bioactive compounds; supercapacitor |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000492117200043 |
| WoS Category |
Chemistry, Multidisciplinary; Green & Sustainable Science & Technology; Engineering, Chemical |
| Research Area |
Chemistry; Science & Technology - Other Topics; Engineering |
| PDF |
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