Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process
Abstract Fallen leaves of landscape trees, as an emerging biomass waste, were valorized using conventional hydrothermal carbonization (HC) and microwave‐assisted hydrothermal carbonization (MHC) pretreatments, and were comparatively characterized for physicochemical properties and thermal degradatio...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-10-01
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| Series: | GCB Bioenergy |
| Subjects: | |
| Online Access: | https://doi.org/10.1111/gcbb.12882 |
| _version_ | 1818734849673920512 |
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| author | Kang Kang Tianle Zhang Guotao Sun Mingqiang Zhu Kankan Li Dongbing Li |
| author_facet | Kang Kang Tianle Zhang Guotao Sun Mingqiang Zhu Kankan Li Dongbing Li |
| author_sort | Kang Kang |
| collection | DOAJ |
| description | Abstract Fallen leaves of landscape trees, as an emerging biomass waste, were valorized using conventional hydrothermal carbonization (HC) and microwave‐assisted hydrothermal carbonization (MHC) pretreatments, and were comparatively characterized for physicochemical properties and thermal degradation kinetics. The results show that MHC is superior to conventional HC operation, because at 200℃, the MHC process not only gives a higher hydrochar yield (45.09 vs. 39.47 wt%) with significantly reduced energy consumption (0.63 vs. 2.74 MJ g−1), but also is more effective in removing K and Si. For isoconversional kinetic analysis, the FWO method provides better results than the KAS method as the latter failed to fit the tree leaves sample (R2 < 0.9). The thermal degradation kinetics at high temperatures (>400℃) showed that the hydrochar obtained from the MHC process has a lower average activation energy of ~190 MJ kg−1 than the conventional HC process (~260 MJ kg−1). This study reveals the potential for valorization of the landscape tree wastes via the MHC process. |
| first_indexed | 2024-12-18T00:11:54Z |
| format | Article |
| id | doaj.art-75cea8a6bec8481b8df229293ee851c7 |
| institution | Directory Open Access Journal |
| issn | 1757-1693 1757-1707 |
| language | English |
| last_indexed | 2024-12-18T00:11:54Z |
| publishDate | 2021-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | GCB Bioenergy |
| spelling | doaj.art-75cea8a6bec8481b8df229293ee851c72022-12-21T21:27:39ZengWileyGCB Bioenergy1757-16931757-17072021-10-0113101690170310.1111/gcbb.12882Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization processKang Kang0Tianle Zhang1Guotao Sun2Mingqiang Zhu3Kankan Li4Dongbing Li5College of Mechanical and Electronic EngineeringNorthwest A&F University Yangling Shaanxi ChinaCollege of Mechanical and Electronic EngineeringNorthwest A&F University Yangling Shaanxi ChinaCollege of Mechanical and Electronic EngineeringNorthwest A&F University Yangling Shaanxi ChinaCollege of Mechanical and Electronic EngineeringNorthwest A&F University Yangling Shaanxi ChinaCollege of Landscape Architecture and Art Northwest A&F University Yangling Shaanxi ChinaKey Comprehensive Laboratory of Forestry College of Forestry Northwest A&F University Yangling Shaanxi ChinaAbstract Fallen leaves of landscape trees, as an emerging biomass waste, were valorized using conventional hydrothermal carbonization (HC) and microwave‐assisted hydrothermal carbonization (MHC) pretreatments, and were comparatively characterized for physicochemical properties and thermal degradation kinetics. The results show that MHC is superior to conventional HC operation, because at 200℃, the MHC process not only gives a higher hydrochar yield (45.09 vs. 39.47 wt%) with significantly reduced energy consumption (0.63 vs. 2.74 MJ g−1), but also is more effective in removing K and Si. For isoconversional kinetic analysis, the FWO method provides better results than the KAS method as the latter failed to fit the tree leaves sample (R2 < 0.9). The thermal degradation kinetics at high temperatures (>400℃) showed that the hydrochar obtained from the MHC process has a lower average activation energy of ~190 MJ kg−1 than the conventional HC process (~260 MJ kg−1). This study reveals the potential for valorization of the landscape tree wastes via the MHC process.https://doi.org/10.1111/gcbb.12882biomasshydrocharhydrothermal carbonizationisoconversional kinetic analysisurban fallen leavesvalorization |
| spellingShingle | Kang Kang Tianle Zhang Guotao Sun Mingqiang Zhu Kankan Li Dongbing Li Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process GCB Bioenergy biomass hydrochar hydrothermal carbonization isoconversional kinetic analysis urban fallen leaves valorization |
| title | Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process |
| title_full | Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process |
| title_fullStr | Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process |
| title_full_unstemmed | Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process |
| title_short | Valorization of tree leaves waste using microwave‐assisted hydrothermal carbonization process |
| title_sort | valorization of tree leaves waste using microwave assisted hydrothermal carbonization process |
| topic | biomass hydrochar hydrothermal carbonization isoconversional kinetic analysis urban fallen leaves valorization |
| url | https://doi.org/10.1111/gcbb.12882 |
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