Evaluation of agricultural residues pyrolysis under non-isothermal conditions: Thermal behaviors, kinetics, and thermodynamics

Chen, Jianbiao; Wang, Yanhong; Lang, Xuemei; Ren, Xiue; Fan, Shuanshi

doi:10.1016/j.biortech.2017.05.036

Cited by 103 publications

(37 citation statements)

References 40 publications

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“…After 750 • C, the DTG curve has stabilized and the final residue has stayed in the range of 30-40%. The amount of the residual weight has found to be in good agreement with the proximate analysis, reflecting the total amount of fixed carbon and ash in biomass [45]. The heating rate is an important factor on biomass pyrolysis.…”

Section: Discussionsupporting

confidence: 57%

Sustainable Valorization of Animal Manure and Recycled Polyester: Co-pyrolysis Synergy

Akyürek

2019

Sustainability

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In this study sustainable valorization of cattle manure, recycled polyester, and their blend (1:1 wt.%) were examined by the thermogravimetric analysis (TGA) method. Pyrolysis tests were performed at 10, 30, and 50 °C/min heating rate from room temperature to 1000 °C under a nitrogen environment with a flow of 100 cm3/min. Kinetics of decomposition were analyzed by using Flynn–Wall–Ozawa (FWO) method. Based on activation energies and conversion points, a single region was established for recycled polyester while three regions of pyrolysis were obtained for cattle manure and their blend. Comparison between experimental and theoretical profiles indicated synergistic interactions during co-pyrolysis in the high temperature region. The apparent activation energies calculated by FWO method for cattle manure, recycled polyester. and their blend were 194.62, 254.22 and 227.21 kJ/mol, respectively. Kinetics and thermodynamic parameters, including E, ΔH, ΔG, and ΔS, have shown that cattle manure and recycled polyester blend is a remarkable feedstock for bioenergy.

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Section: Discussionsupporting

confidence: 57%

Sustainable Valorization of Animal Manure and Recycled Polyester: Co-pyrolysis Synergy

Akyürek

2019

Sustainability

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“…The mechanism function of the gasification reactions was determined by the master-plots method. The mechanism function was calculated using the following equation [32]：…”

Section: Kinetic Model Descriptionmentioning

confidence: 99%

Kinetic study on the CO2 gasification of biochar derived from Miscanthus at different processing conditions

Tian

Wang

et al. 2021

Energy

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CO 2 gasification is an emerging process that can improve the quality of syngas and enhance the CO 2 circular utilisation. This paper presents an analysis on the CO 2 gasification of Miscanthus-derived biochar produced at various processing conditions. The gasification behaviour, kinetics and biochar reactivity were investigated and the correlations to the biochar preparation condition and their microstructure were developed. Results showed that the preparation and gasification reaction conditions had major impact on the biochar reactivity.The order of significance that affected the biochar reactivity was gasification temperature, biochar preparation temperature and processing atmosphere. Increasing heating rate could enhance the biochar reactivity, while increasing preparation temperature could reduce the reactivity in N 2 and He atmosphere. At 600 and 1000 °C, He atmosphere produced the most activity biochar, followed by N 2 and CO 2 . At 800 °C, CO 2 atmosphere gave the highest reactivity, followed by He and N 2 . The Activation Energy (E) of gasification reaction calculated by the Hybrid Model was mainly in the range of 78.09-212.46 kJ mol -1 . The E decreased with the increase of carbon conversion rate. A great kinetic compensation effect between E and A was identified during the CO 2 gasification process.

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“…The master-plots method was used to determine the kinetic model mechanism function. Thermal analysis kinetic equation integral can be expressed as follows [34]：…”

Section: Kinetic Model Descriptionmentioning

confidence: 99%

“…The relative error ranges of the fitted straight line slopes of the three methods were 0-3.49%, 0.11-5.76%, and 0.14-4.23%. When the relative error of the fit straight line slope was less than 10%, the E value can be considered as an independent of X [54].…”

Section: 32non-isothermal Gasification Reaction Kinetic Studies Of MCmentioning

confidence: 99%

Steam gasification of Miscanthus derived char: the reaction kinetics and reactivity with correlation to the material composition and microstructure

Tian

Wang

et al. 2020

Energy Conversion and Management

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This work presents a comprehensive study on the steam gasification kinetics and reactivity of Miscanthus chars (MC) prepared at different temperatures (600 °C, 800 °C and 1000 °C) with the correlations to their composition and microstructure. The results showed that the order of gasification reactivity was MC600 > MC800 > MC1000, and the microcrystalline structure and the content of inherent alkali and alkaline earth metals in the MC were the main factors affecting their reactivity under steam gasification. The reactivity also increased with the increase of gasification temperature, and the effect of gasification temperature on the reactivity of MC was far greater than that of the char production temperature. High heating rate could also effectively promote the gasification reactivity of MC. The kinetics of the steam gasification process were analyzed by different modelling methods. The Random pore model (RPM), among the three methods compared, was the most suitable one to describe the kinetics of isothermal gasification process, of which, the activation energies were in the range of 176-203 kJ/mol with a good kinetic compensation effect between activation energy and pre-exponential factor. The master-plots method proved that the F 2 mechanism was suitable for describing the early stage (X<50%) of the MC gasification reaction, and the D 1 mechanism was suitable to the late stage (X >50%) of the MC gasification process.

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Evaluation of agricultural residues pyrolysis under non-isothermal conditions: Thermal behaviors, kinetics, and thermodynamics

Cited by 103 publications

References 40 publications

Sustainable Valorization of Animal Manure and Recycled Polyester: Co-pyrolysis Synergy

Sustainable Valorization of Animal Manure and Recycled Polyester: Co-pyrolysis Synergy

Kinetic study on the CO2 gasification of biochar derived from Miscanthus at different processing conditions

Steam gasification of Miscanthus derived char: the reaction kinetics and reactivity with correlation to the material composition and microstructure

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