Thermal degradation properties, kinetic, thermodynamic and reaction mechanism of pyrolysis of biomass shells: pistachio, almond, walnut and hazelnut as bioenergy potential

SARAÇOĞLU M., Coruh M. K.

Biomass Conversion and Biorefinery, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1007/s13399-023-05052-5
  • Dergi Adı: Biomass Conversion and Biorefinery
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Anahtar Kelimeler: Biomass, Degradation, Pyrolysis, Reaction mechanism, Thermodynamic, Thermogravimetric
  • Atatürk Üniversitesi Adresli: Evet

Özet

The study investigates thermal degradation behaviors of pistachio (PS), almond (AS), walnut (WS), and hazelnut (HS) shells that are vegetal biomass sources using thermogravimetric analysis (TGA/DTG) methods and under high temperatures. The study was conducted in nitrogen at 298–1173 K heat intervals, at 5, 10, 20, and 25 K.min−1 heating rates. Using data achieved as a result of thermal characterization procedures, model-free Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and model-based Coats-Redfern (CR) methods are used to investigate kinetic and thermodynamic parameters including Ea, ΔH, ΔS, ΔG, and pyrolysis reaction mechanism. Two regions in (0.1 ⩽ α ⩽ 0.5) and (0.55 ⩽ α ⩽ 0.9) intervals are created based on the change of Ea values of pistachio, almond, and hazelnut shells based on α. The best model in Region I was determined to be one of the diffusion (D) models while in Region II, it was determined to be one of the nth-degree chemical reaction (F) models. Graphical Abstract: [Figure not available: see fulltext.].