Thermal decomposition of polymeric resin [(C29H24N205)n]: Kinetic parameters and mechanisms

Perondi, Daniele; Broetto, C.C.; Dettmer, Aline; Wenzel, Bruno München; Godinho, Marcelo

doi:10.1016/j.polymdegradstab.2012.08.022

Cited by 9 publications

(2 citation statements)

References 37 publications

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“…The CS can be used as a support in fluidized bed reactors. The kinetic parameters and mechanisms from polymeric resin [(C 29 H 24 N 2 0 5 ) n ] thermal decomposition were studied by Perondi et al [11]. Only 1% of CS is composed by polymeric resin (organic fraction), which would make it technically unfeasible for the pyrolysis process.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Pyrolysis Products from Waste Tyres and Spent Foundry Sand Co-Pyrolysis

Perondi

Scopel

Silva

et al. 2016

Progress in Rubber, Plastics and Recycling Technology

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The products obtained through thermal conversion of tyres can represent a solution for its disposal which has been considered an environmental problem. In the foundry industry two types of sand are generated: core sand (CS) and green sand (GS); CS is classified as hazardous waste. In this paper two kinds of industrial wastes were approached, in order to propose a solution through co-pyrolysis. The experiments were performed in a bubbling fluidized bed reactor. The oil, fuel gas and char obtained were characterized. The main components present in the oil were naphthalene and anthracene. Char morphology was assessed by Scanning Electron Microscopy, confirming the resin absence on its surface. Isothermal adsorption and desorption indicated that the char obtained from tyre pyrolysis with lower particles has higher superficial area (higher than 200 m2·g−1). The main compounds identified in fuel gas were hydrogen, carbon monoxide, carbon dioxide and hydrocarbons up to 5 carbons.

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Section: Introductionmentioning

confidence: 99%

Characteristics of Pyrolysis Products from Waste Tyres and Spent Foundry Sand Co-Pyrolysis

Perondi

Scopel

Silva

et al. 2016

Progress in Rubber, Plastics and Recycling Technology

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“…Isoconversional methods which determine the kinetic parameters, such as Coats-Redfern (1964), MacCallum-Tanner (1970), andvan Krevelend (1951), use thermogravimetric data to adjust the parameters to attain the best fit to the data experimentally generated. These methods were applied by previous works which studied the thermal degradation of materials, especially for polymeric materials as biomasses, resins, and some selected organic matter, and were related with thermogravimetric data (White et al, 2011;Perondi, 2012).…”

Section: Introductionmentioning

confidence: 99%

Determination of the Giant-Bamboo Pyrolysis Kinetic Parameters

Homrich¹,

Toss²,

Godinho³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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The kinetics involved in giant bamboo thermal degradation under N2 atmosphere was investigated through non-isothermal thermogravimetric analyses (TGA) and derivative thermogravimetry (DTG) applying three isoconversional methods: Coats and Redfern (CR), MacCallum and Tanner (MT), and van Krevelen (VK). Besides that, samples characterization was conducted by van Soest's method and by proximate analysis. The TGA experiments were performed with a N2 rate of 50 mL/min and five different heating rates were used: 5, 10, 15, 25 and 50 °C/min, for a samples aged 5.5 years. The van Soest's test indicated that the giant bamboo is composed of up to 73% of cellulose and the proximate analysis showed up to 84% of volatile matter. The highest weight loss region evaluated by the DTG was between 200-450°C, corresponding to a weight loss range of 10-85% in mass. The Coats-Redfern's fitting-model indicated that two-dimensional diffusion was the mechanism which best describes the pyrolysis process in the highest weight loss region. The kinetic parameters determined by CR's, MT's, and MT's methods, respectively, varied between 136 and 150 kJ/mol for the activation energy and between 2.75×10 10 and 3.6×10 11 s-1 for the preexponential factor. Comparing the calculated and experimental weight loss, was verified that the CR's and MT's average deviations were lower than the evaluated by VK's method, indicating that the CR's and MT's describe better the giant bamboo pyrolysis.

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Kinetic study of the multistep thermo‐oxidative degradation of thermosetting siloxane‐containing polyimide and unmodified polyimide

Liu

Song

et al. 2020

J of Applied Polymer Sci

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In this study, the thermo‐oxidative degradation kinetics of thermosetting siloxane‐containing polyimide (SPI) and unmodified polyimide (PI) were comparatively studied to reveal effect of siloxane on the thermo‐oxidative stability, and to understand how they behave under elevated temperature. Results of thermogravimetirc analysis complemented by structural and morphological observations indicate two individual processes compose thermo‐oxidative degradation of SPI and PI. Therefore, different kinetic triplets are employed to describe the two processes. It is found that the degradation activation energy (E) of the first process for SPI is lower than that for PI, while in the second process, the E value of SPI goes beyond that of PI. The difference of structural changes between SPI and PI during thermo‐oxidative degradation offers rational explanation. The oxidation of siloxane in the first process results in weight loss of SPI at relatively lower temperature, while the formed silica‐type structures retard the second degradation process, making SPI exhibited a slower degradation rate than PI. In addition, the two constituent processes for thermo‐oxidative degradation of SPI and PI obey the Avrami‐Erofeev models. Based on the obtained kinetic parameters, simulations of thermo‐oxidative degradation for both SPI and PI were successfully realized, which gives a precise mathematical description of their degradation behaviors.

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Thermal decomposition of polymeric resin [(C29H24N205)n]: Kinetic parameters and mechanisms

Cited by 9 publications

References 37 publications

Characteristics of Pyrolysis Products from Waste Tyres and Spent Foundry Sand Co-Pyrolysis

Characteristics of Pyrolysis Products from Waste Tyres and Spent Foundry Sand Co-Pyrolysis

Determination of the Giant-Bamboo Pyrolysis Kinetic Parameters

Kinetic study of the multistep thermo‐oxidative degradation of thermosetting siloxane‐containing polyimide and unmodified polyimide

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