Kinetics Study of Polypropylene Pyrolysis by Non-Isothermal Thermogravimetric Analysis

Dubdub, Ibrahim

doi:10.3390/ma16020584

Cited by 19 publications

(8 citation statements)

References 35 publications

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“…Among them, the pyrolysis of MR and individual plastics can be described by a single one-stage reaction, while the pyrolysis of the mixtures is fitted by two successive first-order reactions. The E values of MR, PE, PP, and PET were 6.18, 119.05, 84.30, and 74.38 kJ/mol, respectively, similar to previous studies [ 36 , 37 , 38 ]. The E values of plastics are 12~19 times higher than that of MR, indicating that plastics have relatively high thermal stability.…”

Section: Resultssupporting

confidence: 90%

Thermal Behavior and Pyrolysis Kinetics of Mushroom Residue with the Introduction of Waste Plastics

Li,

Pu,

Wang

et al. 2023

Polymers

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Co-pyrolysis is considered a very promising technology for the treatment of solid wastes as it can rapidly realize the volume reduction of raw materials and obtain high value-added products. To realize the resource utilization of newly emerging solid wastes in relation to edible fungi residue and waste plastics, mushroom residue (MR), a representative of edible fungi residue, was co-pyrolyzed with waste plastic bags (PE), waste plastic lunch boxes (PP), and waste plastic bottles (PET). The thermal behavior and pyrolysis kinetics of the mixtures were investigated. It was found that the softening of the plastics in the mixtures led to an increase in the initial pyrolysis temperature of MR by 2–27 °C, while the pyrolytic intermediates of MR could greatly promote the decomposition of the plastics, resulting in a decrease in the initial pyrolysis temperatures of PE, PP, and PET in the mixtures by 25, 8, and 16 °C, respectively. The mixture of MR and PE (MR/PE) under different mixture ratios showed good synergies, causing the pyrolysis peaks attributed to MR and PE to both move towards the lower temperature region relative to those of individual samples. The increase in heating rate led to enhanced thermal hysteresis of the reaction between MR and PE. The strength of the interaction between plastics and MR based on mass variation was subject to the order PE > PP > PET. The pyrolysis activation energies of MR, PE, PP, and PET calculated from kinetic analysis were 6.18, 119.05, 84.30, and 74.38 kJ/mol, respectively. The activation energies assigned to MR and plastics were both reduced as plastics were introduced to co-pyrolyze with MR, indicating that MR and plastics have a good interaction in the co-pyrolysis process. This study provides theoretical and experimental guidance for the resource utilization of agricultural solid wastes via thermochemical conversion.

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Section: Resultssupporting

confidence: 90%

Thermal Behavior and Pyrolysis Kinetics of Mushroom Residue with the Introduction of Waste Plastics

Li,

Pu,

Wang

et al. 2023

Polymers

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“…The derivative curves show a single peak. The position of the peak in the DTGA trace is well consistent with the DTGA curve for PP reported in some literature [ 33 ]. It should be considered that deviation from this position has been also reported [ 34 ], and that a shift towards lower temperatures was observed for PP waste and PP samples after several reprocessing cycles or oxidative decomposition [ 34 , 35 ].…”

Section: Resultssupporting

confidence: 89%

Composition and Workability of Plastic Fractions Recovered from Commingled Waste Discarded by a Composting Plant

et al. 2023

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This paper deals with the recovery of plastic fractions from waste discarded by an industrial composting plant that processes the organic fraction of municipal solid waste. Polymeric fractions (PE, PP and PET) were sorted from this discarded waste using a NIR separator. The polymeric fractions were then washed to remove residual contaminants and characterized with the aim of assessing their composition. A process of pelletizing and injection molding suitable for producing specimens made of 100% of these recovered materials was set up. The tensile strength and stiffness, as well as the microstructure of the recycled plastics, were investigated. The mechanical features of samples fully made of recycled PE and PP were like those characteristic of virgin polymers. Samples made of PET did not show completely satisfactory properties, as they displayed rather poor elastic modulus and ductility.

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“…In this case, bioPP shows a single-step curve; the polymer chains are completely degraded in a wide range between 300 °C and 460 °C, with the maximum degradation rate at 435 °C. During the polymer degradation, chains break, and as a result, volatile products are realized, leading to a mass loss [ 67 ]. The employed PP used by Azizi et al [ 68 ] shows a similar range of degradation in a single step; this single-step degradation process changes to a two-step degradation after the introduction of a lignocellulosic filler.…”

Section: Resultsmentioning

confidence: 99%

Incorporation of Argan Shell Flour in a Biobased Polypropylene Matrix for the Development of High Environmentally Friendly Composites by Injection Molding

et al. 2023

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In this study, a new composite material is developed using a semi bio-based polypropylene (bioPP) and micronized argan shell (MAS) byproducts. To improve the interaction between the filler and the polymer matrix, a compatibilizer, PP-g-MA, is used. The samples are prepared using a co-rotating twin extruder followed by an injection molding process. The addition of the MAS filler improves the mechanical properties of the bioPP, as evidenced by an increase in tensile strength from 18.2 MPa to 20.8 MPa. The reinforcement is also observed in the thermomechanical properties, with an increased storage modulus. The thermal characterization and X-ray diffraction indicate that the addition of the filler leads to the formation of α structure crystals in the polymer matrix. However, the addition of a lignocellulosic filler also leads to an increased affinity for water. As a result, the water uptake of the composites increases, although it remains relatively low even after 14 weeks. The water contact angle is also reduced. The color of the composites changes to a color similar to wood. Overall, this study demonstrates the potential of using MAS byproducts to improve their mechanical properties. However, the increased affinity with water should be taken into account in potential applications.

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Kinetics Study of Polypropylene Pyrolysis by Non-Isothermal Thermogravimetric Analysis

Cited by 19 publications

References 35 publications

Thermal Behavior and Pyrolysis Kinetics of Mushroom Residue with the Introduction of Waste Plastics

Thermal Behavior and Pyrolysis Kinetics of Mushroom Residue with the Introduction of Waste Plastics

Composition and Workability of Plastic Fractions Recovered from Commingled Waste Discarded by a Composting Plant

Incorporation of Argan Shell Flour in a Biobased Polypropylene Matrix for the Development of High Environmentally Friendly Composites by Injection Molding

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