Determination of the Self-Heating Temperature of Coal by Means of TGA Analysis


NAKTİYOK J.

ENERGY & FUELS, cilt.32, sa.2, ss.2299-2305, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 2
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1021/acs.energyfuels.7b02296
  • Dergi Adı: ENERGY & FUELS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2299-2305
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, the self-heating tendency of Tavsanh (Turkey) coal was investigated by the apparatus of thermal analysis. TG-DTG and DSC-DDSC plots obtained at air atmosphere from 25 to 800 degrees C were used to determine the self-heating temperature (T-sh) and the combustion behavior of coal. The self-heating temperature changes versus the particle sizes of coal and heating rates were examined. Also, kinetic parameters of the main combustion region were obtained in the temperature range of 25 to 800 degrees C at different heating rates (1, 2.5, 5, and 10 degrees C min(-1)) under nonisothermal heating conditions at air atmosphere. The activation energy, pre-exponential factor, and reaction mechanism were calculated by using KAS, FWO, Coats-Redfern, and Master-Plot methods. It was understood that the oxidation process of coal was controlled by the first order [F-1: -ln (1 - alpha)] mechanism.