Kinetics and thermodynamics of microalgae residue oxidative pyrolysis based on double distributed activation energy model with simulated annealing method

Xiaojuan Guo, Junmeng Cai, Xi Yu

Research output: Contribution to journalArticlepeer-review

Abstract

Non-isothermal thermogravimetric analysis (TGA) at four heating rates of 10, 20, 30 and 40 K min−1 under oxidative atmosphere was employed to investigate the characteristics of microalgae residue oxidative pyrolysis. The double distributed activation energy model (DAEM) was used to analyze the oxidative pyrolysis kinetics of microalgae residue and the simulated annealing method was employed for the estimation of the model parameters. The results showed that the double DAEM could describe the kinetic experimental data of microalgae residue oxidative pyrolysis very well whilst the simulated annealing method was effective for determining the kinetic parameters of the double DAEM. The kinetic process of microalgae residue oxidative pyrolysis could be considered as two partially overlapped pseudo-sub-processes. The mean values of activation energy distributions were 179 and 259 kJ mol−1 for the first and second pseudo-sub-processes. The thermodynamic parameters of microalgae residue oxidative pyrolysis processes at the different heating rate were studied based on the obtained kinetic parameters.
Original languageEnglish
Article number104997
JournalJournal of Analytical and Applied Pyrolysis
Volume154
Early online date2 Jan 2021
DOIs
Publication statusE-pub ahead of print - 2 Jan 2021

Keywords

  • Distributed activation energy model (DAEM)
  • Kinetics
  • Microalgae residue
  • Simulated annealing method
  • Thermochemical conversion
  • Thermodynamics

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