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Kinetic Study of Waste Tire Pyrolysis Using Thermogravimetric Analysis.

ABSTRACT: The influence of particle size (0.3 and 5.0 mm) and heating rate (5, 10, and 20 °C min^-1) on the kinetic parameters of pyrolysis of waste tire was studied by thermogravimetric analysis and mathematical modeling. Kinetic parameters were determined using the Friedman model, the Coats-Redfern model, and the ASTM E1641 standard based on Arrhenius linearization. In the Friedman model, the activation energy was between 40 and 117 kJ mol^-1 for a particle size of 0.3 mm and between 23 and 119 kJ mol^-1 for a particle size of 5.0 mm. In the Coats-Redfern model, the activation energy is in a range of 46 to 87 kJ mol^-1 for a particle size of 0.3 mm and in a range of 43 to 124 kJ mol^-1 for a particle size of 5.0 mm. Finally, in the ASTM E1641 standard, the activation energy calculated was between 56 and 60 kJ mol^-1 for both particle sizes. This study was performed to obtain kinetic parameters from different mathematical methods, examining how the particle size and heating rate influence them.

SUBMITTER: Ramirez Arias AM

PROVIDER: S-EPMC9118263 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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Kinetic Study of Waste Tire Pyrolysis Using Thermogravimetric Analysis.

Ramírez Arias Aida M AM Moreno-Piraján Juan Carlos JC Giraldo Liliana L

ACS omega 20220502 19

The influence of particle size (0.3 and 5.0 mm) and heating rate (5, 10, and 20 °C min<sup>-1</sup>) on the kinetic parameters of pyrolysis of waste tire was studied by thermogravimetric analysis and mathematical modeling. Kinetic parameters were determined using the Friedman model, the Coats-Redfern model, and the ASTM E1641 standard based on Arrhenius linearization. In the Friedman model, the activation energy was between 40 and 117 kJ mol<sup>-1</sup> for a particle size of 0.3 mm and between ...[more]

PMID: 35601327

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Project description:BackgroundIn general, the greater the number of directly linked nitrogen atoms in a molecule, the better its energetic performance, while the stability will be accordingly lower. But 1,1'-azobis-1,2,3-triazole (1) and 4,4'-azobis-1,2,4-triazole (2) show remarkable properties, such as high enthalpies of formation, high melting points, and relatively high stabilities. In order to rationalize this unexpected behavior of the two compounds, it is necessary to study their thermal decompositions and pyrolyses. Although a great deal of research has been focused on the synthesis and characterization of energetic materials with 1 and 2 as the backbone, a complete report on their fundamental thermodynamic parameters and thermal decomposition properties has not been published.MethodsThermogravimetric-differential scanning calorimetry were used to obtain the thermal decomposition data of the title compounds. Kissinger and Ozawa-Doyle methods, the two selected non-isothermal methods, are presented for analysis of the solid-state kinetic data. Pyrolysis-gas chromatography/mass spectrometry was used to study the pyrolysis process of the title compounds.ResultsThe DSC curves show that the thermal decompositions of 1 and 2 are at different heating rates involved a single exothermic process. The TG curves provide insight into the total weight losses from the compounds associated with this process. At different pyrolysis temperatures, the compositions and types of the pyrolysis products differ greatly and the pyrolysis reaction at 500 °C is more thorough than 400 °C.ConclusionsApparent activation energies (E) and pre-exponential factors (lnA/s-1) are 291.4 kJ mol-1 and 75.53 for 1; 396.2 kJ mol-1 and 80.98 for 2 (Kissinger). The values of E are 284.5 kJ mol-1 for 1 and 386.1 kJ mol-1 for 2 (Ozawa-Doyle). The critical temperature of thermal explosion (T b ) is evaluated as 187.01 °C for 1 and 282.78 °C for 2. The title compounds were broken into small fragment ions under the pyrolysis conditions, which then might undergo a multitude of collisions and numerous other reactions, resulting in the formation of C2N2 (m/z 52), etc., before being analyzed by the GC/MS system.

Dataset Information

Kinetic Study of Waste Tire Pyrolysis Using Thermogravimetric Analysis.

Publications

Kinetic Study of Waste Tire Pyrolysis Using Thermogravimetric Analysis.

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