Biomass Torrefaction in a Bench-Scale Screw Reactor: Effect of Temperature and Biomass Type

dc.creatorJaramillo , Fredy E.
dc.creatorAlvarado , Pedro N.
dc.creatorMazo , Ricardo A.
dc.date2022-06-28
dc.date.accessioned2025-10-01T23:52:47Z
dc.descriptionThe intensive use of fossil fuels contributes significantly to global warming and the growing world energy crisis. Thus, it is necessary to develop alternative energy sources that make the energy matrix more flexible and reduce environmental impacts. An outstanding option is the conversion of residual biomass into energy because it produces a low-emission fuel in terms of CO2. Therefore, this study aimed to improve the physicochemical properties of two residual biomasses (i.e., pine sawdust and spent coffee ground, SCG) through a torrefaction process. Biomass valorization was carried out in a bench-scale screw reactor (2.8 kg/h). The effect of temperature was evaluated between 200 °C and 300 °C, and the torrefied biomasses were characterized by instrumental techniques: calorific value, infrared spectroscopy analysis, thermogravimetric analysis, and scanning electron microscopy. Both biomasses exhibited an increase in calorific value when the process temperature was raised. This behavior is associated with the thermal degradation of the hemicellulose fraction and the increase in fixed carbon. In addition, the infrared analysis showed a decrease in OH and H-O-H signals associated with polar functional groups. These results show the high potential of the valorization of these two biomasses thanks to the decrease in polar groups, which have a great affinity with water, and the obtaining of calorific values close to those of fossil fuels such as lignite or sub-bituminous coal.en-US
dc.descriptionEl uso intensivo de combustibles fósiles contribuye significativamente al calentamiento global y a la creciente crisis energética mundial, en consecuencia, es necesario el desarrollo de fuentes de energía alternativas que permitan flexibilizar la matriz energética y mitigar los impactos ambientales. Una opción destacada es la conversión de biomasa residual a energía, pues la biomasa constituye un combustible con impacto menor respecto a las emisiones de CO2. Por consiguiente, este estudio tuvo como objetivo promover las propiedades fisicoquímicas de dos biomasas residuales, el aserrín de pino y la borra de café, mediante el proceso de torrefacción. La valorización energética de las biomasas se realizó en un reactor de tornillo a escala de banco (2.8 kg/h). Se evaluó el efecto de la temperatura en el rango entre 200 °C y 300 °C y se caracterizaron las biomasas torrefactadas mediante técnicas instrumentales: poder calorífico, análisis próximo, análisis infrarrojo y microscopía electrónica de barrido. Para ambas biomasas, al aumentar la temperatura de proceso se obtuvo un incremento del poder calorífico. Este comportamiento se asocia a la degradación térmica de la fracción de hemicelulosa, así como al incremento del carbono fijo. Además, en los análisis infrarrojos se observó una disminución de las señales OH y H-O-H asociadas a grupos funcionales polares. Los resultados anteriores muestran el alto potencial de valorización de las biomasas de estudio, respecto a la disminución de grupos polares que tienen gran afinidad por el agua, así como la obtención de poderes caloríficos cercanos a un combustible tipo carbón lignito o subbituminoso.es-ES
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dc.identifierhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/2269
dc.identifier10.22430/22565337.2269
dc.identifier.urihttps://hdl.handle.net/20.500.12622/7817
dc.languagespa
dc.publisherInstituto Tecnológico Metropolitano (ITM)es-ES
dc.relationhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/2269/2449
dc.relationhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/2269/2455
dc.relationhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/2269/2456
dc.relationhttps://revistas.itm.edu.co/index.php/tecnologicas/article/view/2269/2464
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dc.rightsDerechos de autor 2022 TecnoLógicases-ES
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0es-ES
dc.sourceTecnoLógicas; Vol. 25 No. 54 (2022); e2269en-US
dc.sourceTecnoLógicas; Vol. 25 Núm. 54 (2022); e2269es-ES
dc.source2256-5337
dc.source0123-7799
dc.subjectBiomass energyen-US
dc.subjectenergy efficiencyen-US
dc.subjecttemperatureen-US
dc.subjecttorrefactionen-US
dc.subjectEnergía de la biomasaes-ES
dc.subjectrendimiento energéticoes-ES
dc.subjecttemperaturaes-ES
dc.subjecttorrefacciónes-ES
dc.titleBiomass Torrefaction in a Bench-Scale Screw Reactor: Effect of Temperature and Biomass Typeen-US
dc.titleTorrefacción de biomasa en un reactor de tornillo a escala de banco: efecto de la temperatura y del tipo de biomasaes-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeResearch Papersen-US
dc.typeArtículos de investigaciónes-ES

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