Sugarcane Bagasse Torrefaction for Fluidized Bed Gasification

Sugarcane Bagasse Torrefaction for Fluidized Bed Gasification

Sugarcane bagasse has a great potential to be used as biofuel; however, its use as feedstock in fluidized bed reactors is hampered due to its fibrous nature, low apparent density, high moisture content, and difficulties with its fluidization. The present study evaluated the torrefaction of sugarcane...

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Bibliographic Details
Published in:Applied sciences Vol. 11; no. 13; p. 6105
Main Authors: Pedroso, Daniel Travieso, Machin, Einara Blanco, Cabrera-Barjas, Gustavo, Flores, Mauricio, Urra, Héctor Grandón, de Carvalho, Felipe Solferini, Santos, Maria Isabel Silva dos, Machín, Adrian Blanco, Canettieri, Eliana Vieira, Pérez, Néstor Proenza, Teixeira Lacava, Pedro, Ribeiro dos Santos, Leila, Andrade de Carvalho Júnior, João
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-07-2021
Subjects:
Bagasse
Biofuels
Biomass
Bulk density
Cellulose
Drying
Efficiency
Electricity distribution
Energy
Energy requirements
entrained flow gasifier
Fluidization
Fluidized beds
Flux density
Gasification
Heating rate
Lignin
Moisture content
Nuclear fuels
Pyrolysis
Raw materials
Sugarcane
sugarcane bagasse
Thermogravimetric analysis
torrefaction
Volatiles
Water content
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Summary:Sugarcane bagasse has a great potential to be used as biofuel; however, its use as feedstock in fluidized bed reactors is hampered due to its fibrous nature, low apparent density, high moisture content, and difficulties with its fluidization. The present study evaluated the torrefaction of sugarcane bagasse to propose suitable process conditions that balance the properties of the fuel obtained in the torrefaction and the process’s energy requirements. Based on the thermogravimetric analysis and previous reports, two final process temperatures (230 °C and 280 °C) and residence times (35 and 45 min) for the same heating rate (5 °C/min) and nitrogen flow (1 L/min) were evaluated. Within the experimental conditions evaluated, it can be concluded that for 30 min of residence time, the average target temperature of 230 °C should be high enough to produce a stable torrefacted bagasse with a 3.41% reduction in the volatile content and obtain 98.85% of energy yield. Higher temperatures increase the feedstock’s carbon content and energy density, but the reduction in energy yield and the fraction of volatiles do not justify higher temperatures or longer residence times for pretreating the sugarcane bagasse.
ISSN:2076-3417
2076-3417
DOI:10.3390/app11136105