Influence of torrefaction pretreatment on the pyrolysis of Eucalyptus clone: A study on kinetics, reaction mechanism and heat flow

Doddapaneni, Tharaka Rama Krishna C.; Konttinen, Jukka; Hukka, Terttu I.; Moilanen, Antero

doi:10.1016/j.indcrop.2016.08.013

Cited by 58 publications

(42 citation statements)

References 28 publications

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“…However, biomass has numerous challenges, such as but not limited to, high moisture content, poor grindability, hydroscopicity, low heating value, fibrous in nature, and so forth. [2,3]. These challenges confine the combustion performance and escalate the handling and transportation cost of biomass.…”

Section: Introductionmentioning

confidence: 99%

Valorization of Waste Wood as a Solid Fuel by Torrefaction

Poudel

Karki

2018

Energies

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Abstract:The aim of this study was to investigate the optimal temperature range for waste wood and the effect torrefaction residence time had on torrefied biomass feedstock. Temperature range of 200-400 • C and residence time of 0-50 min were considered. In order to investigate the effect of temperature and residence time, torrefaction parameters, such as mass yield, energy yield, volatile matter, ash content and calorific value were calculated. The Van Krevelen diagram was also used for clarification, along with the CHO index based on molecular C, H, and O data. Torrefaction parameters, such as net/gross calorific value and CHO increased with an increase in torrefaction temperature, while a reduction in energy yield, mass yield, and volatile content were observed. Likewise, elevated ash content was observed with higher torrefaction temperature. From the Van Krevelen diagram, it was observed that at 300 • C the torrefied feedstock came in the range of lignite. With better gross calorific value and CHO index, less ash content and nominal mass loss, 300 • C was found to be the optimal torrefaction temperature for waste wood.

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Section: Introductionmentioning

confidence: 99%

Valorization of Waste Wood as a Solid Fuel by Torrefaction

Poudel

Karki

2018

Energies

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“…Model-free method is based on the assumption that when activation energy value is constant, the rate of reaction is a function of only temperature [25]. Experimental data with four heating rates (5,10,15, and 20 °C/min) for temperature range 105 °C up to 400 °C obtained from thermogravimetric analysis were fitted according to the chosen model-free method. i.e.…”

Section: Model-free Kinetic Evaluation Via Kas Methodsmentioning

confidence: 99%

“…For torrefaction kinetic analysis, samples were heated at four dynamic heating rates of 5, 10, 15 and 20 °C/min. In this study, single-step reaction scheme was implemented according to Equation (1) [10]:…”

Section: Torrefaction Kinetics Of Raw Opfpmentioning

confidence: 99%

“…Malaysia is blessed with indigenous generation mix of renewable energy resources such as biomass and biomass materials (oil palm mill/plantation residues, forestry biomass, agro-based and farming industries biomass waste), mini-hydro power, solar power and wind energy [1]. In relation to future energy demand and fossil fuel depleting re-gy from biomass source is regarded as a shortterm and sustainable energy resource with mature and readily applicable conversion technologies and could be used in the form of solid, liquid and gaseous products [10].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Model-Free and Model-Fitting Kinetic Analysis during Torrefaction of Oil Palm Frond Pellets

Matali

Rahman

Idris

et al. 2020

Bull. Chem. React. Eng. Catal.

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Torrefaction is a thermal conversion method extensively used for improving the properties of biomass. Usually this process is conducted within a temperature range of 200-300 °C under an inert atmosphere with residence time up to 60 minutes. This work aimed to study the kinetic of thermal degradation of oil palm frond pellet (OPFP) as solid biofuel for bioenergy production. The kinetics of OPFP during torrefaction was studied using frequently used iso-conversional model fitting (Coats-Redfern (CR)) and integral model-free (Kissinger-Akahira-Sunose (KAS)) methods in order to provide effective apparent activation energy as a function of conversion. The thermal degradation experiments were conducted at four heating rates of 5, 10, 15, and 20 °C/min in a thermogravimetric analyzer (TGA) under non-oxidative atmosphere. The results revealed that thermal decomposition kinetics of OPFP during torrefaction is significantly influenced by the severity of torrefaction temperature. Via Coats-Redfern method, torrefaction degradation reaction mechanism follows that of reaction order with n = 1. The activation energy values were 239.03 kJ/mol and 109.28 kJ/mol based on KAS and CR models, respectively. Copyright © 2020 BCREC Group. All rights reserved

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“…Tais tecnologias têm sido cada vez mais aprimoradas, de modo a explorar ao máximo a eficiência da biomassa como alternativa energética (DODDAPANENI et al, 2016). Diferentes procedimentos têm sido investidos a fim de melhorar as propriedades físicas da biomassa sólida, dentre os quais os tratamentos mecânicos, tais como a peletização e a briquetagem, que resultam em um produto da biomassa homogêneo e de alta densidade energética (CHAO et al, 2015;IBRAHIM et al, 2013;CHEN et al, 2017;RUDOLFSSON et al, 2017).…”

Section: Introductionunclassified