Pyrolytic kinetics of polystyrene particle in nitrogen atmosphere : particle size effects and application of distributed activation energy method

Jiang, Lin (avtor), Yang, Xin-Rui (avtor), Gao, Xu (avtor), Xu, Qiang (avtor), Das, Oisik (avtor), Sun, Jin-Hua (avtor), Kitek Kuzman, Manja (avtor)

This work was motivated by a study of particle size effects on pyrolysis kinetics and models of polystyrene particle. Micro-size polystyrene particles with four different diameters, 5, 10, 15, and 50 µm, were selected as experimental materials. Activation energies were obtained by isoconversional methods, and pyrolysis model of each particle size and heating rate was examined through different reaction models by the Coats–Redfern method. To identify the controlling model, the Avrami–Eroféev model was identified as the controlling pyrolysis model for polystyrene pyrolysis. Accommodation function effect was employed to modify the Avrami–Eroféev model. The model was then modified to f(α) = nα$^{0.39n − 1.15}$(1 − α)[−ln(1 − α)]$^{1 − 1/n}$, by which the polystyrene pyrolysis with different particle sizes can be well explained. It was found that the reaction model cannot be influenced by particle geometric dimension. The reaction rate can be changed because the specific surface area will decrease with particle diameter. To separate each step reaction and identify their distributions to kinetics, distributed activation energy method was introduced to calculate the weight factor and kinetic triplets. Results showed that particle size has big impacts on both first and second step reactions. Smaller size particle can accelerate the process of pyrolysis reaction. Finally, sensitivity analysis was brought to check the sensitivity and weight of each parameter in the model.

• Jezik: Angleški jezik
• Ključne besede: particle size, model free, model fitting, Avrami-Eroféev, DAEM
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 18 str.
• Številčenje: Vol. 12, iss. 2, art. 421
• PID: 20.500.12556/RUL-133260
• UDK: 62
• ISSN pri članku: 2073-4360
• DOI: 10.3390/polym12020421
• COBISS.SI-ID: 3172745
• Datum objave v RUL: 18.11.2021

Gradivo je del revije

• Naslov: Polymers
• Skrajšan naslov: Polymers
• Založnik: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 12.02.2020