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Upgrading properties of biochar fuel derived from cassava rhizome via torrefaction: Effect of sweeping gas atmospheres and its economic feasibility
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Document Title
Upgrading properties of biochar fuel derived from cassava rhizome via torrefaction: Effect of sweeping gas atmospheres and its economic feasibility
Author
Nakason K., Khemthong P., Kraithong W., Chukaew P., Panyapinyopol B., Kitkaew D., Pavasant P.
Name from Authors Collection
Affiliations
Department of Sanitary Engineering, Faculty of Public Health, Mahidol University, Bangkok, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), Bangkok, Thailand; National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand; Tree Moments Co. Ltd., Bangkok, Thailand
Type
Article
Source Title
Case Studies in Thermal Engineering
ISSN
2214157X
Year
2021
Volume
23
Open Access
Gold
Publisher
Elsevier Ltd
DOI
10.1016/j.csite.2020.100823
Format
Abstract
Torrefaction is a promising biomass thermal conversion technology to produce biochar due to its ease of operation and mild operating conditions. In this study, cassava rhizome (CR) was torrified under various sweeping gas types (nitrogen (N2), carbon dioxide (CO2), mixture gas (N2 + CO2)) and flow rates (50, 150, 250 mL/min) at 200-300 °C for 30 min. The experimental results show that fuel properties of CR were remarkably upgraded after torrefaction. Sweeping gas has less effect on fuel properties of torrified CR than torrefaction temperature. Torrefaction under CO2 atmosphere produced the biochar with minimum ash content. Torrefaction at 300 °C under 50 mL/min CO2 was recommended as the promising condition to produce biochar replacing lignite coal. Thermal properties and chemical functional groups of the derived biochar suggested that torrefaction process removed mainly oxygen and hydrogen contents which could be achieved through decarbonization (DC), dehydrogenation (DH), and deoxygenation (DO) pathways. Economic feasibility revealed that the torrefaction of CR is cost-advantage under the proposed condition. © 2020 The Author(s).
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
China Medical Board; Mahidol University; National Science and Technology Development Agency; National Nanotechnology Center
License
CC BY or CC BY-NC-ND
Rights
Elsevier B.V.
Publication Source
Scopus
Note
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