Determination of kinetic parameters for the sisal residue pyrolysis through thermal analysis

Santos, Daniel Bemmuyal Passos; Jesus, Marcos Fábio de; Júnior, José Mário Ferreira; Pires, Carlos Augusto de Moraes

doi:10.1016/j.jiec.2022.02.013

Cited by 7 publications

(5 citation statements)

References 52 publications

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“…The Friedman model uses a differential isoconversional technique [14] to determine the activation energy (E A ) and frequency factor (A) of the pyrolysis process. This model can be found by rearranging Equation (7).…”

Section: Friedman Modelmentioning

confidence: 99%

“…On the other hand, Camelo et al 2022 [13] carried out a thermokinetic study of the pyrolysis of Abelmoschus esculentus L. Moench over zirconium oxide, observing the occurrence of dehydration reactions and oxidative degradation of the chelating agents present in the biomass. Santos et al 2022 [14] proposed a new model to determine the degradation kinetics of sisal residue, where a fit model is used to define the reaction order and an isoconversion model is used to obtain the activation energy and pre-exponential factor. The authors conclude that the Friedman model was the only one that presented satisfactory results and had good agreement with the results already reported in the literature using only the free model.…”

Section: Introductionmentioning

confidence: 99%

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Thermokinetic Study of Catalytic Pyrolysis of Medium-Density Fiberboards over Beta-Zeolite-Supported Platinum

Carvalho

Mayer

Oliveira

et al. 2023

Biomass

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Catalytic pyrolysis is an attractive alternative for converting biomass into energy and chemicals, replacing fossil sources. Efficient catalysts can be used to remove compounds containing oxygen during pyrolysis, improving the bio-oil properties and thus being an important route towards sustainability. Catalytic pyrolysis of medium-density fiberboard (MDF) residues over platinum (1%) supported on beta zeolite was carried out using a biomass/catalyst ratio of 1.0/0.2. The catalysts were characterized via Fourier transform infrared spectroscopy, flame atomic absorption spectrometry, X-ray diffraction, nuclear magnetic resonance, temperature-programmed reduction, and temperature-programmed desorption of ammonia. The thermokinetic and thermodynamic parameters were determined using the isoconversional and non-isothermal methods of Friedman, Flynn-Wall-Ozawa (FWO), and Kissinger-Ahakira-Sunose (KAS). The Friedman method was the most adequate to describe the reaction and thermodynamic parameters. The results show that the catalysts promote the reduction in activation energy compared to non-catalytic pyrolysis. Non-impregnated and impregnated catalysts showed different activation energies and thus different reactions. The addition of platinum slightly increased the activation energy due to the promotion of reactions that require more energy, for example, cracking and coke deposition.

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Section: Friedman Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermokinetic Study of Catalytic Pyrolysis of Medium-Density Fiberboards over Beta-Zeolite-Supported Platinum

Carvalho

Mayer

Oliveira

et al. 2023

Biomass

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“…Furthermore, other factors can affect the process, like intraphase and/or interphase transport phenomena, particle size and operational parameters such as heating rate, temperature, and type of reactor. The understanding of pyrolysis is fundamental for designing industrial-scale processes and choosing the most suitable catalyst to obtain commercially valuable products [16]. To better understand pyrolysis, two strategies are generally adopted: the prediction of the pathway reaction by monitoring and quantifying the products and the determination of the thermokinetic and thermodynamic parameters [17].…”

Section: Introductionmentioning

confidence: 99%

“…Several techniques can be used for the determination of kinetic parameters from non-isothermal thermogravimetric analysis, such as isoconversional fit and free models, which provide information related to the energy required for the pyrolysis reaction in a temperature range [18]. Isoconversional fit models use a single heating rate while free models calculate the thermokinetic parameters from curves obtained at different heating rates [16]. Isoconversional fit methods assume that the entire process can be simplified to a single-step equation without the need for analysis of intermediate processes.…”

Section: Introductionmentioning

confidence: 99%

“…Carvalho et al (2020) used the Friedman model to predict the effect of alkaline treatment on Pachira aquatica A. biomass [20] and Castro et al (2020) used both model-free (Friedman) and model-fit (Criado) to study the effect of chemical pretreatment on the behavior of pseudo-components of Nephelium lappaceum L [21]. All these values are needed to simulate and design industrial processes, therefore, making the experimental research of great importance [16]. In this study, the thermokinetic parameters of residues of medium density fiber (MDF) of pyrolysis over beta zeolite-supported nickel were determined by Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS) and Friedman isoconversional methods.…”

Section: Introductionmentioning

confidence: 99%

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Thermokinetic and Thermodynamic Parameters for Catalytic Pyrolysis of Medium Density Fiber over Ni/Beta Zeolite

Rangel¹,

Virgens²,

Mayer³

et al. 2022

Catal Res

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Catalytic pyrolysis is an attractive alternative for converting biomass into energy and chemicals to replace fossil sources. This has encouraged the search for efficient catalysts that can directly remove oxygenated products during pyrolysis, since they are the main problem in the processing and use of the products obtained. The catalytic and non-catalytic pyrolysis of medium density fiber (MDF) over beta zeolite-supported nickel (3 and 5%) was performed using the biomass/catalyst of 1.0/0.2 ratio. The thermokinetic and thermodynamic parameters were determined using the isoconversional and non-isothermal methods of Flynn-Wall-Ozawa (FWO), Kissinger-Ahakira-Sunose (KAS) and Friedman. In addition, the master plots by the Criado method were used to determine the most suitable theoretical solid-state mechanism. The thermodynamic parameters were also obtained using the Friedman method. The results showed that the addition of the catalyst decreased the activation energy and affected the initial, final and maximum decomposition temperatures, which was related to the superficial acidic sites of beta zeolite that promote cracking and hydrocracking reactions. Nickel further decreased this parameter due to the activity of this metal in hydrodeoxygenation/deoxygenation, oligomerization and dehydration. The Friedman method provided the best correlation coefficient among the methods and was used to determine the thermodynamic parameters. The results showed that E<sub>a</sub> increases in the order: MB3Ni < MB5Ni < MB < M.

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Thermal decomposition characteristics and study of the reaction kinetics of tea-waste

Alashmawy

Hassan

Elwardany

2023

Biomass Conv. Bioref.

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This study aimed to investigate waste-tea’s pyrolysis kinetics and thermodynamics to assess its potential for thermochemical processes. In this study, three primary samples of tea-waste are prepared for investigation: raw, torrefied at 200 °C, and torrefied at 600 °C. Under a nitrogen environment, thermogravimetric analyses (TGA) were conducted at seven heating rates (10, 15, 20, 25, 30, 35, and 40 °C/min) to investigate the effect of heating rates on the kinetic parameters at temperatures ranging from 27 to 1000 °C. Using seven heating rates was beneficial to take advantage of multiple heating rates techniques alongside single heating rate techniques. These heating rates were combined, forming four heating rate groups (HRG). The pyrolysis kinetic parameters are determined using two model-fit-methods, direct Arrhenius and Coats-Redfern methods, and two model-free methods, Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) methods. Thermodynamic data comprising ΔH, ΔG, and ΔS are addressed. The X-ray fluorescence (XRF) and Fourier transform infrared (FTIR) spectrum are used to assess the presence of natural minerals in tea-waste. The results indicated that the tea-waste material has the potential to produce syngas. The torrefaction process at 600 °C shows a 53% increase in the energy content compared to the raw biomass. The Coats-Redfern is shown to be more reliable than the direct Arrhenius method. The activation energy (Ea) witnesses rising with the heating rate (β) from Ea = 55.27 kJ mol−1 at β = 10 °C min−1 to 60.04 kJ mol−1 at β = 40 °C min−1 for raw tea-waste using Coats-Redfern method. For model-free approaches, the minimum activation energy values of the raw tea-waste samples are 82 kJ/mol for FWO and 78 kJ/mol for KAS, whereas the peak values are 420 kJ/mol for KAS and 411 kJ/mol for FWO. A comparison of the effect of heating rate groups for FWO method in raw material case indicated that HRG1 has the maximum activation energy average value. The resulting values of HRG1, HRG2, HRG3, and HRG4 were 269 kJ/mol, 145 kJ/mol, 174 kJ/mol, and 202 kJ/mol, respectively.

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Determination of kinetic parameters for the sisal residue pyrolysis through thermal analysis

Cited by 7 publications

References 52 publications

Thermokinetic Study of Catalytic Pyrolysis of Medium-Density Fiberboards over Beta-Zeolite-Supported Platinum

Thermokinetic Study of Catalytic Pyrolysis of Medium-Density Fiberboards over Beta-Zeolite-Supported Platinum

Thermokinetic and Thermodynamic Parameters for Catalytic Pyrolysis of Medium Density Fiber over Ni/Beta Zeolite

Thermal decomposition characteristics and study of the reaction kinetics of tea-waste

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