20.500.12556/RUL-133260 Pyrolytic kinetics of polystyrene particle in nitrogen atmosphere particle size effects and application of distributed activation energy method 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. particle size model free model fitting Avrami-Eroféev DAEM true false true Angleški jezik Ni določen Članek v reviji 2021-11-18 15:12:24 2021-11-18 15:12:25 2022-09-12 04:15:32 0000-00-00 00:00:00 2020 0 0 18 str. iss. 2, art. 421 Vol. 12 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 62 2073-4360 10.3390/polym12020421 3172745 RAZ_Lin_Jiang_2020.pdf RAZ_Lin_Jiang_2020.pdf 1 F8B85E40B1DAF6D75821271E4C739646 e76772ca5c4c7dfa9dbd05c323e83bb2ce778c8ff0a8f57a8b9d810a62f3dd18 b61c67c0-4879-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=151166 https://www.mdpi.com/2073-4360/12/2/421 1 7ba15d94-4879-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=151165 Biotehniška fakulteta 0 0 0