LAPSE:2023.17180
Published Article
LAPSE:2023.17180
A Technical Analysis of Solid Recovered Fuel from Torrefied Jatropha Seed Residue via a Two-Stage Mechanical Screw Press and Solvent Extraction Process
March 6, 2023
Abstract
This study investigated the torrefaction of de-oiled Jatropha seed residue after a two-stage sequential process consisting of mechanical screw pressing and solvent extraction using n-hexane (denoted as JMS). The optimal torrefaction temperature (Tr) and torrefaction time (tr) were determined in the ranges of 260−300 °C and 10−60 min, respectively, so to achieve a better heating value and satisfactory energy densification (ED) with acceptable mass loss. Thermogravimetric analysis was employed to elucidate the thermal decomposition behaviors of JMS. By comparison with the torrefaction of Jatropha seed residue after mechanical oil extraction by screw pressing only (namely, JMET), the results indicated that the ED of the torrefaction of JMS yielding the torrefied product JMST (two-stage product) was higher than that of the torrefaction of JME giving the torrefied product JMET (single-stage product). Further, it was found that JMET contained some tar, which was attributed to a thermal reaction in the residual oil in JME during torrefaction. The tar/oil content of JMET was about 1.0−1.8 wt.% in the determined optimal conditions. Thus, the enhanced recovery of the residual oil is advantageous not only because it allows obtaining more oil from Jatropha seed residue with a positive net energy gain but also because it prevents the formation of tar in torrefied biomass products.
This study investigated the torrefaction of de-oiled Jatropha seed residue after a two-stage sequential process consisting of mechanical screw pressing and solvent extraction using n-hexane (denoted as JMS). The optimal torrefaction temperature (Tr) and torrefaction time (tr) were determined in the ranges of 260−300 °C and 10−60 min, respectively, so to achieve a better heating value and satisfactory energy densification (ED) with acceptable mass loss. Thermogravimetric analysis was employed to elucidate the thermal decomposition behaviors of JMS. By comparison with the torrefaction of Jatropha seed residue after mechanical oil extraction by screw pressing only (namely, JMET), the results indicated that the ED of the torrefaction of JMS yielding the torrefied product JMST (two-stage product) was higher than that of the torrefaction of JME giving the torrefied product JMET (single-stage product). Further, it was found that JMET contained some tar, which was attributed to a thermal reaction in the residual oil in JME during torrefaction. The tar/oil content of JMET was about 1.0−1.8 wt.% in the determined optimal conditions. Thus, the enhanced recovery of the residual oil is advantageous not only because it allows obtaining more oil from Jatropha seed residue with a positive net energy gain but also because it prevents the formation of tar in torrefied biomass products.
Record ID
Keywords
biomass waste, de-oil process, Jatropha curcas L., solid recovered fuel, torrefaction
Subject
Suggested Citation
Yuan MH, Chang CC, Hsu TC, Shie JL, Chen YH, Chang CY, Lin CF, Yu CP, Wu CH, Do MV, Lin FC, Lee DJ, Liu BL, Chen YH, Huang M. A Technical Analysis of Solid Recovered Fuel from Torrefied Jatropha Seed Residue via a Two-Stage Mechanical Screw Press and Solvent Extraction Process. (2023). LAPSE:2023.17180
Author Affiliations
Yuan MH: Department of Occupational Safety and Health, China Medical University, Taichung 406, Taiwan
Chang CC: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Hsu TC: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Shie JL: Department of Environmental Engineering, National I-Lan University, Yi-Lan 260, Taiwan
Chen YH: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
Chang CY: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Lin CF: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Yu CP: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Wu CH: Department of Environmental Engineering, Da-Yeh University, Changhua 515, Taiwan
Do MV: Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi 1000000, Vietnam [ORCID]
Lin FC: Department of Forestry and Resource Conservation, National Taiwan University, Taipei 106, Taiwan
Lee DJ: Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
Liu BL: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Chen YH: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan [ORCID]
Huang M: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan [ORCID]
Chang CC: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Hsu TC: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Shie JL: Department of Environmental Engineering, National I-Lan University, Yi-Lan 260, Taiwan
Chen YH: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan
Chang CY: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Lin CF: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Yu CP: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Wu CH: Department of Environmental Engineering, Da-Yeh University, Changhua 515, Taiwan
Do MV: Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi 1000000, Vietnam [ORCID]
Lin FC: Department of Forestry and Resource Conservation, National Taiwan University, Taipei 106, Taiwan
Lee DJ: Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
Liu BL: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
Chen YH: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan [ORCID]
Huang M: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan [ORCID]
Journal Name
Energies
Volume
14
Issue
23
First Page
7876
Year
2021
Publication Date
2021-11-24
ISSN
1996-1073
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PII: en14237876, Publication Type: Journal Article
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LAPSE:2023.17180
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Mar 6, 2023
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