Thermal conversion behavior of paper mill sludge: characterization, kinetic, and thermodynamic analyses


Yaras A., DEMİREL B. , AKKURT F., Arslanoglu H.

Biomass Conversion and Biorefinery, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 2021
  • Doi Number: 10.1007/s13399-020-01232-9
  • Title of Journal : Biomass Conversion and Biorefinery

Abstract

© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.The present paper reports the pyrolysis behavior, kinetic, and thermodynamic parameters of paper mill sludge (PMS), which is a paper manufacturing residue and cannot be re-evaluated, at three heating rates (5, 10, and 20 °C min−1) under non-isothermal conditions. Ultimate and proximate analyses of the paper mill sludge were carried out. Kinetic and thermodynamic parameters were calculated using four model-free methods; Flynn-Wall Ozawa (FWO), Friedman, Kissinger-Akahira-Sunose (KAS), and distributed activation energy model (DAEM). High R2 values revealed that all models are compatible with TGA data. The activation energy calculated (101.01 kJ mol−1) from FWO was higher than the other three methods. Pre-exponential factor values ranged from 0.56 × 103 and 14.55 × 103 s−1 for all methods. Kinetic and thermodynamic findings will be beneficial in terms of the process design of PMS pyrolysis. Graphical abstract: [Figure not available: see fulltext.]