Pyrolysis Kinetics Mechanism Analysis of Sawdust by Sestak-Berggren Function

Xu, Qiao; Zhang, H.; Li, H.; Zhao, Shenghao; Wan, Ling; Yan, Yunfei

doi:10.1080/15567036.2011.551922

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…This approach has been used on carbon glass epoxy 45 and epoxy phenol 46 . While epoxy composite degradation kinetics have been investigated using the Sestak‐Berggren model, such as in this literature 47–49 . According to

f ((), α)

expressions of Bna and SB, the conversion variation over time is given by Equations (7) and (8), respectively, where n is the reaction order and m is the autocatalytic one.…”

Section: Methodsmentioning

confidence: 99%

“…46 While epoxy composite degradation kinetics have been investigated using the Sestak-Berggren model, such as in this literature. [47][48][49] According to f α ð Þ expressions of Bna and SB, the conversion variation over time is given by Equations ( 7) and ( 8), respectively, where n is the reaction order and m is the autocatalytic one. Multivariate nonlinear regression optimization has been used for Bna and SB models to predict the kinetic parameters of each sample.…”

Section: Model-basedmentioning

confidence: 99%

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Intumescent fire‐retardant performance and small‐scale reaction mechanism on banana/bio‐epoxy composites

Melati,

Settar,

Chetehouna

et al. 2023

Fire and Materials

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The present work deals with the thermal degradation, the physical characterization, and kinetic mechanisms of green epoxy resin‐based biocomposites (BC) reinforced by banana leaf fiber (BLF). The two main samples have been manufactured using the vacuum bag resin transfer molding method. The first, BLF‐based BC, is used as a control sample, while the second sample is coated with 6% wt. of intumescent fire retardant (IFR), which contains APP and boric acid. The effect of IFR coating has been investigated using thermogravimetric analysis (TGA) under inert and oxidative atmospheres and kinetic studies of model‐free and model‐based approaches have been applied for predicting the kinetic parameters of thermal degradation reactions. The TGA results show that the IFR coating delays the thermal degradation around 13–20 K of BLF‐based BC materials, which leads to an increase of 8% in the char residue under inert atmosphere. In addition, the sample has been characterized by SEM, EDS, and FTIR analysis (before and after the TGA test). The effectiveness of the IFR protective role is displayed on the SEM micrographs by showing the hole of the char enclosed and built the foam layer. The kinetic parameters from model‐free and model‐based curve fitting of BLF‐based BC and BLF‐based BC‐coated IFR are obtained, while the effect of IFR on the kinetic parameter increased the activation energy (model‐free and model‐based) under inert atmosphere. The fitting methods and optimization procedure gave excellent results for kinetic parameters, showing a particularly good correspondence with the TGA experimental data.

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f ((), α)

expressions of Bna and SB, the conversion variation over time is given by Equations (7) and (8), respectively, where n is the reaction order and m is the autocatalytic one.…”

Section: Methodsmentioning

confidence: 99%

Section: Model-basedmentioning

confidence: 99%

Intumescent fire‐retardant performance and small‐scale reaction mechanism on banana/bio‐epoxy composites

Melati,

Settar,

Chetehouna

et al. 2023

Fire and Materials

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“…Similar to FWO, KAS is also an integral iso‐conversional method to determine the activation energy required for the process at different conversion, based on the following equation.

\ln ((), \frac{β}{T^{2}}) = \ln ((), \frac{A \cdot E}{R \cdot g (α)}) - \frac{E}{RT}

…”

Section: Methodsmentioning

confidence: 99%

Iso‐conversional kinetic and thermodynamic studies of Indian sagwan sawdust pyrolysis for its bioenergy potential

Gupta

Mondal

2018

Env Prog and Sustain Energy

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Thermochemical conversion of biomass for bio‐energy production is a potential option where condensable fractions can be utilized as fuel or for valuable chemicals and residual fractions for syngas (CO + H2) production. Present study aims at investigating the physicochemical properties and pyrolysis kinetics of Indian sagwan sawdust degradation using thermogravimetric analyzer at three heating rates (5, 10, and 20 K/min). Physical and chemical properties of ISS were determined by proximate, ultimate, compositional analysis, FTIR, XRD, and higher heating value. TGA results showed maximum devolatilization took place in the temperature range of 480–750 K. Three different iso‐conversional models Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, and Friedman methods were applied on TGA results to calculate the activation energy and pre‐exponential factors. Average activation energies from FWO, KAS, and Friedman methods were 145.78, 143.35, and 142.87 kJ/mol and pre‐exponential factors ranged from 105 to 1011 indicating empirical first order reaction. Gibbs free energy change and entropy change varied from 184.43 to 187.21 kJ/mol and from −147.21 to −35.59 J/mol, representing disorderness of products were lower than that of the initial compound. The above kinetics, thermodynamics and HHV results, confirmed that ISS has enough potential to be a source bio‐energy. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13131, 2019

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“…Interestingly, the similar table was iterated in Ref. [12]. Both the above equations were concurrently named by readers as the SB equation as e.g.…”

mentioning

confidence: 99%

On the eliminating attempts toward Šesták–Berggren equation

Militký

Šesták

2016

J Therm Anal Calorim

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Some recent commentaries doubt the originality of Š esták-Berggren equation even though it received until today almost eight hundred citation responses. The worth of SB equation is examined in terms of general logistic equation showing its divergent philosophical strategy from dissimilar orthodox geometrical modeling in kinetics. The use of appended terms 'truncated' and 'extended' is questioned.

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Pyrolysis Kinetics Mechanism Analysis of Sawdust by Sestak-Berggren Function

Cited by 6 publications

References 15 publications

Intumescent fire‐retardant performance and small‐scale reaction mechanism on banana/bio‐epoxy composites

Intumescent fire‐retardant performance and small‐scale reaction mechanism on banana/bio‐epoxy composites

Iso‐conversional kinetic and thermodynamic studies of Indian sagwan sawdust pyrolysis for its bioenergy potential

On the eliminating attempts toward Šesták–Berggren equation

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