Kinetic and thermodynamic comparative study of quince bio-waste slow pyrolysis before and after sustainable recovery of pectin compounds

Torres-Sciancalepore, Rodrigo; Fernandez, Anabel; Asensio, Daniela Anabel; Riveros‐Gomez, Mathias; Fabani, María Paula; Fouga, Gastón G.; Rodríguez, Rosa; Mazza, Germán

doi:10.1016/j.enconman.2021.115076

Cited by 60 publications

(18 citation statements)

References 69 publications

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“…This ensured that the rate of the reaction is influenced by only reaction kinetics. 25 Before analysis, the PCBs were dissolved in concentrated nitric acid (4 M) to extract the metals from the circuit boards. Nitric acid treatment is shown to dissolve a number of metals in PCBs including copper.…”

Section: Methodsmentioning

confidence: 99%

“…A small particle size is preferred to minimize the influence of heat and mass transfer effects that would normally be present across a larger particle size or chunk of materials. This ensured that the rate of the reaction is influenced by only reaction kinetics . Before analysis, the PCBs were dissolved in concentrated nitric acid (4 M) to extract the metals from the circuit boards.…”

Section: Methodsmentioning

confidence: 99%

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Distributed Activation Energy Modeling and Py-GC/MS Studies on Pyrolysis of Different Printed Circuit Boards for Resource Recovery

2022

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Printed circuit boards (PCBs) constitute an important segment of electronic waste that can be effectively utilized to recover valuable metals and organics. The present work is focused on the kinetics and product distribution from pyrolysis of three different PCB samples, viz., television PCB (TV PCB), motherboard PCB (MB PCB), and hard disk PCB (HD PCB). The PCBs were pretreated to eliminate most of the metallic constituents. Kinetic analysis was performed using Vyazovkin’s isoconversional method and distributed activation energy model (DAEM). The average apparent activation energies obtained from the Vyazovkin method were 207.2, 158.9, and 179.7 kJ mol –1 for the TV PCB, MB PCB, and HD PCB, respectively. The DAEM with five, four, and four pseudo-components was used to describe the decomposition kinetics of the TV PCB, MB PCB, and HD PCB, respectively. Importantly, two types of distributions, viz., Gaussian and Weibull, were utilized to effectively model the nonisothermal data obtained from thermogravimetric analysis at 10 and 20 °C min –1 . The evolution of pyrolysates belonging to functional groups such as phenolics, aromatics, aliphatics, halogenated compounds, N-containing compounds, and oxygenates was studied at two different temperatures (500 and 700 °C) using analytical pyrolysis–gas chromatograph/mass spectrometry (Py-GC/MS). The Py-GC/MS results demonstrated an increase in selectivity to aromatics and straight-chain aliphatics at 700 °C with a concomitant decrease in selectivity to phenols and oxygenates.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Distributed Activation Energy Modeling and Py-GC/MS Studies on Pyrolysis of Different Printed Circuit Boards for Resource Recovery

2022

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“… 23 − 25 This problem widely exists in the fields of biomass and coal pyrolysis. For instance, Torres-Sciancalepore et al 24 studied the kinetic and thermodynamic behavior of the pyrolysis of quince waste and pectin-free quince waste after extraction. It was found that the pyrolysis process followed a multiple-step mechanism with three different steps.…”

Section: Introductionmentioning

confidence: 99%

“…The master decomposition curve of the feedstocks was established to help optimize the thermal debinding process. Similarly, polymers formed from some gel systems often exhibit multiple pyrolysis peaks, and the pyrolysis reaction does not follow a single mechanism function. − This problem widely exists in the fields of biomass and coal pyrolysis. For instance, Torres-Sciancalepore et al studied the kinetic and thermodynamic behavior of the pyrolysis of quince waste and pectin-free quince waste after extraction.…”

Section: Introductionmentioning

confidence: 99%

Thermal Debinding Kinetics of Gelcast Ceramic Parts via a Modified Independent Parallel Reaction Model in Comparison with the Multiple Normally Distributed Activation Energy Model

Huang

2022

ACS Omega

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This work aims to provide useful insights into the thermal debinding kinetics of gelcast ceramic parts, especially for debinding kinetics prediction involving heat preservation. Debinding experiments were conducted in a differential thermogravimetric analyzer at five heating rates (5, 8, 10, 15, and 20 °C/min) in the temperature range of 35–900 °C under an air atmosphere. The conversion (α) and pyrolysis rate (dα/d T ) data were simulated using a modified independent parallel reaction (IPR) model and a multiple normally distributed activation energy model (M-DAEM). Their validity was assessed and compared by checking the agreement between the experimental results and the prediction capability. The results showed that both the modified IPR model and M-DAEM had high predictability for thermal debinding kinetics under linear heating conditions. The fitting quality parameters (Fit) were less than 1.406 and 1.01%, respectively. The activation energies ( E i , i = 1, 2, 3, 4, and 5) calculated by the M-DAEM ranged from 153.312 to 217.171 kJ/mol. The relationships between E i of pseudo components 1 to 5 calculated by the modified IPR model were a function of the conversion rate. The E i values were E 1 (α) = 116.750 + 11.153α – 26.772α 2 + 4.362α 3 kJ/mol, E 2 (α) = 139.595 – 66.162α + 75.702α 2 – 38.041α 3 kJ/mol, E 3 (α) = 190.854 + 135.755α – 214.801α 2 + 116.093α 3 kJ/mol, E 4 (α) = 64.068 + 280.086α – 380.270α 2 + 264.724α 3 kJ/mol, and E 5 (α) = 188.257 – 77.086α + 74.129α 2 – 48.669α 3 kJ/mol, respectively. However, it is noteworthy that the α and dα/d T curves predicted by the modified IPR model with a deviation of less than 8% were better than those predicted by the M-DAEM for the linear thermal debinding process with the holding stage. Accordingly, it is believed that the proposed modified IPR model is suitable for describing the thermal debinding kinetics involving the heat preservation of gelcast green parts.

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“…The preparation techniques of biochar involve slow and fast pyrolysis, hydrothermal carbonization, gasification, and microwave irradiation [3,5]. To preserve more chars, slow pyrolysis is widely applied for biochar production on a large scale [6]. Most biological residues experience the conversion of carbon phases under a range of moderate-low temperatures (300-500 • C), which is similar to smoldering wildfires.…”

Section: Introductionmentioning

confidence: 99%

The Sorption of Sulfamethoxazole by Aliphatic and Aromatic Carbons from Lignocellulose Pyrolysis

et al. 2022

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Massive biomass waste with lignocellulose components can be used to produce biochar for environmental remediation. However, the impact of lignocellulose pyrolysis on biochar structure in relation to the sorption mechanism of ionizable antibiotics is still poorly understood. In this paper, diverse techniques including thermogravimetric analysis and 13C nuclear magnetic resonance were applied to investigate the properties of biochars as affected by the pyrolysis of cellulose and lignin in feedstock. Cellulose-derived biochars possessed more abundant groups than lignin-derived biochars, suggesting the greater preservation of group for cellulose during the carbonization. Higher sorption of sulfamethoxazole (SMX) was also observed by cellulose-derived biochars owing to hydrogen bond interaction. Sorption affinity gradually declined with the conversion aliphatic to aromatic carbon, whereas the enhanced specific surface area (SSA) subsequently promoted SMX sorption as evidenced by increased SSA-N2 and SSA-CO2 from 350 to 450 °C. The decreased Kd/SSA-N2 values with increasing pH values implied a distinct reduction in sorption per unit area, which could be attributed to enhanced electrostatic repulsion. This work elucidated the role of carbon phases from thermal conversion of lignocellulose on the sorption performance for sulfonamide antibiotics, which will be helpful to the structural design of carbonaceous adsorbents for the removal of ionizable antibiotics.

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Kinetic and thermodynamic comparative study of quince bio-waste slow pyrolysis before and after sustainable recovery of pectin compounds

Cited by 60 publications

References 69 publications

Distributed Activation Energy Modeling and Py-GC/MS Studies on Pyrolysis of Different Printed Circuit Boards for Resource Recovery

Distributed Activation Energy Modeling and Py-GC/MS Studies on Pyrolysis of Different Printed Circuit Boards for Resource Recovery

Thermal Debinding Kinetics of Gelcast Ceramic Parts via a Modified Independent Parallel Reaction Model in Comparison with the Multiple Normally Distributed Activation Energy Model

The Sorption of Sulfamethoxazole by Aliphatic and Aromatic Carbons from Lignocellulose Pyrolysis

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