Pyrolysis of ficus nitida wood: Determination of kinetic and thermodynamic parameters

Tabal, Amine; Barakat, Abdellatif; Aboulkas, A.; harfi, K. El

doi:10.1016/j.fuel.2020.119253

Cited by 55 publications

(14 citation statements)

References 46 publications

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“…All Iso-conversional methods do not give any notable fluctuation in E a which is generally observed in kinetics of biomass pyrolysis. A similar trend of E a values were also found for pyrolysis of ficus nitida wood [32], and invasive species of water hyacinth [26]. R 2 in Fig.…”

Section: Isoconversional Kinetic Analysissupporting

confidence: 81%

Pyrolytic conversion of a novel biomass Ficus natalensis barkcloth: physiochemical and thermo-kinetic analysis

Farooq

Ashraf

Aslam

et al. 2021

Biomass Conv. Bioref.

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The over reliance on fossil fuels for power generation has resulted in an alarming depletion of petrochemical crude oil reserves, that also is the cause of elevated greenhouse gas effects. Biomass resources are considered potential fuels for the future on account of their renewable and carbon-neutral features. This study presents the physicochemical characteristics and pyrolysis behavior of a novel biomass Ficus natalensis barkcloth (FNB). Physicochemical characterization indicated that the FNB has 74.4% volatile matter contents, a higher heating value (HHV) of 13.8 MJ/kg, and it has 67% cellulose as its main chemical constituent. Thermogravimetric analysis (TGA) showed that major decomposition occurred at the core devolatization (235℃ to 410 ℃) under inert thermal degradation. Model-free and model-fitting kinetic methods were applied to TGA data to compute the kinetics triplet for FNB biomass. The average activation energy (E a ) of the FNB pyrolysis process was determined to be 168 kJ/mol. The compensation effects between pre-exponential factor (A) and E a detected a rise in collision intensity for the pyrolysis of FNB at high heating rates. The Criado master plot results showed that the pyrolysis of FNB followed first-order reaction (F 1 ) mechanism. The thermodynamic parameters, such as change in enthalpy (ΔH), Gibbs free energy (ΔG), and entropy (ΔS), were also calculated and compared with kinetics parameters to evaluate the evolution of thermal degradation. Physiochemical and thermo-kinetic analysis of FBN revealed its comparable bioenergy potential with established biomasses.

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Section: Isoconversional Kinetic Analysissupporting

confidence: 81%

Pyrolytic conversion of a novel biomass Ficus natalensis barkcloth: physiochemical and thermo-kinetic analysis

Farooq

Ashraf

Aslam

et al. 2021

Biomass Conv. Bioref.

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“…This variation of pre-exponential (A) for the three components can be explained by the aggregate and structure composition of the RW biomass and the difficult thermal decomposition behavior of the cellulose, hemicellulose and lignin. Tabal et al (2021) have worked on pyrolysis of Ficus nitada wood biomass; they have determined kinetic parameters from thermogravimetric data of ficus wood biomass (Tabal et al, 2021). The mean values of pre-exponential factors have been 1.12 3 10 12 s À1 , 1.14 3 10 14 s À1 and 3.40 3 10 14 s À1 for hemicellulose, cellulose and lignin, respectively.…”

Section: Activation Energy Determinationmentioning

confidence: 99%

“…The mean values of pre-exponential factors have been 1.12 3 10 12 s À1 , 1.14 3 10 14 s À1 and 3.40 3 10 14 s À1 for hemicellulose, cellulose and lignin, respectively. Several researches have mentioned that the pre-exponential factor is proportional to the energy of activation, and there are kinetic compensation effects between the pre-exponential factor and the activation's energy, that can be interpreted by a linear relationship (Tabal et al, 2021;Anca-Couce et al, 2016;.…”

Section: Activation Energy Determinationmentioning

confidence: 99%

“…As can be seen in Figs 10-12, the comparison between theoretical curves and experimental master curve for the decomposition of RW's three components indicates that hemicellulose can be described by the D 4 kinetic model, the cellulose compound can be described by D 2 and the lignin component can be associated to F 3 kinetic model. Kumar Singh et al (2021) and Tabal et al (2021), have worked on rice bowl and ficus nitida wood biomass, respectively. They have used master plots to determine the kinetic models of hemicellulose, cellulose and lignin components; they have concluded that kinetic model f(x) that describes the thermochemical decomposition of biomass, depends on the nature of the biomass through thermogravimetric analaysis process and the percentage of cellulose, hemicellulose and lignin components, and ash percentage (Kumar Singh et al, 2021;Tabal et al, 2021).…”

Section: Reaction Mechanism Of Rw Biomass' Componentsmentioning

confidence: 99%

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Thermal degradation and kinetic studies of redwood (Pinus sylvestris L.)

et al. 2022

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In this scientific paper, thermochemical conversion of redwood (RW) was studied. Using the thermogravimetric analysis' technique (TGA), the thermal behavior of RW samples was examined at four heating rates ranging from 5 to 20 K min−1 in inert atmosphere between 300 and 900 K. Two main objectives have been set for this study; the first one was the determination of the kinetic decomposition parameters of RW (Pinus sylvestris L.), and the second one was the study of the variation of characteristic parameters from the TG-DTG curves of the main RW's components, such as; cellulose, hemicellulose and lignin. The kinetic analysis was performed using three isoconversional methods (Vyazovkin (VYA), Friedman (FR) and Flynn-Wall-Ozawa (FWO)), Avrami theory method and the Integral master-plots (Z(x)/Z(0.5)) method to estimate activation energy (Ea), reaction order (n), pre-exponential factor (A) and model kinetic (f(x)) for the thermal decomposition of cellulose, hemicellulose and lignin components.The DTG and TG curves showed that three stages identify the thermal decomposition of RW, the first stage corresponds to the decomposition of hemicellulose and the second stage corresponds to the cellulose, while the third stage corresponds to the lignin's decomposition. For the range of conversion degree (x) investigated (0.1 ≤ x ≤ 0.7), the mean values of apparent activation energies for RW biomass were 127.60–130.65 KJ mol−1, 173.74–176.48 KJ mol−1 and 197.21–200.36 KJ mol−1 for hemicellulose, cellulose and lignin, respectively. Through varied temperatures from 550 to 600 K for hemicellulose, from 600 to 650 K for cellulose and from 750 to 800 K for lignin, the corresponding mean values of reaction order (n) were 0.200 for hemicellulose, 0.209 for cellulose and 0.047 for lignin. The pre-exponential factor's average values for three components of RW ranges from 0.08 × 1012 s−1 to 2.5 × 1012 s−1 (Ahemicellulose = 1.09 × 1012 s−1), 0.10 × 1014 s−1 to 0.28 × 1014 s−1 (Acellulose = 0.17 × 1014 s−1) and 3.07 × 1016 s−1 to 3.69 × 1016 s−1 (Alignin = 3.33 × 1016 s−1), respectively. The experimental data of RW had overlapped the D4, D2 and F3 in the conversion degree of 10–30%, 30–55% and 55–70% for the three components, respectively.

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“…The results showed that both FWO and KAS models fitted well the experimental date and were suitable for the assessment of the involved mechanisms during the degradation of the used lignocellulosic materials. Thermogravimetric analysis is the most common technique used to estimate the kinetic triplets and thermodynamic parameters of pyrolysis process [14,15]. In addition, Jeguirim et al investigated the thermal degradation behavior of five tropical biomasses using thermogravimetric method [16].…”

Section: Introductionmentioning

confidence: 99%

Investigations on potential Tunisian biomasses energetic valorization: thermogravimetric characterization and kinetic degradation analysis

Mabrouki¹,

Abbassi²,

Khiari³

et al. 2022

Comptes Rendus. Chimie

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In this work, six Tunisian local biomasses, namely ziziphus wood (ZW), almond shells (AS), olive stones (OS), vine stems (VS) and date palm leaflets (DPL) and trunks (DPT) were slowly pyrolyzed under inert atmosphere at a heating rate of 5 °C/min through thermogravimetric (TG) analyses. The thermal degradation of samples involves the interaction in a porous media of heat, mass and momentum transfer with chemical reactions. Heat is transported by conduction, convection and radiation and, mass transfer is driven by pressure and concentration gradients. Thermal degradation curves have been studied with minute details for each degradation step. The Coats-Redfern model was used to extract the kinetic parameters from the TG data, then the kinetic parameters such as the activation energy, the pre-exponential factor and the order of the reaction were calculated. Results showed that the total mass losses amounts and kinetics are dependent on the type of the used biomass. Moreover, the devolatilization could be described by the first order model, while the char formation stage was better described by the second and third order reactions model. The physicochemical characteristics of these samples were also determined. The volatile matter (VM) content varies considerably, with values ranging from 67.19% for AS to 77.4% for ZW. The maximum values were obtained for ZW and VS with values of 77.4% and 71.9%, respectively. The lowest value (67.19%) was determined for AS. In addition, the ash contents vary between 0.8% for OS and 5.66% for DPT.

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Pyrolysis of ficus nitida wood: Determination of kinetic and thermodynamic parameters

Cited by 55 publications

References 46 publications

Pyrolytic conversion of a novel biomass Ficus natalensis barkcloth: physiochemical and thermo-kinetic analysis

Pyrolytic conversion of a novel biomass Ficus natalensis barkcloth: physiochemical and thermo-kinetic analysis

Thermal degradation and kinetic studies of redwood (Pinus sylvestris L.)

Investigations on potential Tunisian biomasses energetic valorization: thermogravimetric characterization and kinetic degradation analysis

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