Pyrolysis of cattle manure: kinetics and thermodynamic analysis using TGA and artificial neural network

Gajera, Bhautik; Tyagi, Uplabdhi; Sarma, Anil Kumar; Jha, Mithilesh Kumar

doi:10.1007/s13399-023-04476-3

Cited by 10 publications

(1 citation statement)

References 40 publications

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“…The parameters were estimated in the ranges of 188–250 kJ/mol (ΔH), 154–232 kJ/mol (ΔG), and 267–356 J/mol K (ΔS) at 5 °C/min; in contrast, these parameters were estimated in the ranges of 188–250 kJ/mol (ΔH), 153–170 kJ/mol (ΔG), and 256–340 J/mol K (ΔS) at 30 °C/min. As shown, the heating rate had a significant effect on the calculated parameters; also, the calculated ΔH parameters had positive values indicating an endothermic nature [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

Pyrolysis Kinetic Behavior and Thermodynamic Analysis of PET Nonwoven Fabric

Yousef,

Eimontas,

Striūgas

et al. 2023

Materials

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This research aims to maximize polyethylene terephthalate (PET) nonwoven fabric waste and make it as a new source for benzoic acid extraction using a pyrolysis process. The treatment was performed using a thermogravimetric analyzer (TGA) and released products were characterized using FTIR spectroscopy and gas chromatography–mass spectrometry (GC–MS). The pyrolysis kinetic and thermodynamic behavior of PET fabric was also studied and simulated using different linear and nonlinear models. The results show that the PET fabric is very rich in volatile matter (80 wt.%) and can completely degrade under 490 °C with a weight loss of 84%. Meanwhile, the generated vapor was rich in the carbonylic C=O functional group (FTIR), and the GC–MS analysis concluded that benzoic acid was the major compound with an abundance of 75% that was achieved at the lowest heating rate (5 °C/min). The linear kinetic results showed that PET samples had an activation energy in the ranges of 193–256 kJ/mol (linear models) and ~161 kJ/mol (nonlinear models). The thermodynamic parameters, including enthalpy, Gibbs free energy, and entropy, were estimated in the ranges of 149–250 kJ/mol, 153–232 kJ/mol, and 256–356 J/mol K, respectively. Accordingly, pyrolysis treatment can be used to extract benzoic acid from PET fabric waste with a 134% increase in the benzoic acid abundance that can be recovered from PET bottle plastic waste.

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Section: Resultsmentioning

confidence: 99%