Physical and chemical properties of selected Turkish lignites and their pyrolysis and gasification rates determined by thermogravimetric analysis

Cakal G. O., Yucel H., Guruz A. G.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, cilt.80, sa.1, ss.262-268, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 80 Sayı: 1
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jaap.2007.03.005
  • Dergi Adı: JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.262-268
  • Anahtar Kelimeler: lignite, CO2-gasification, pyrolysis, reactivity, TGA, HEAT-TREATED COALS, CARBON-DIOXIDE, CHAR GASIFICATION, ACTIVATED CARBONS, PORE STRUCTURE, SURFACE-AREA, REACTIVITY, TEMPERATURE, BEHAVIOR, DECOMPOSITION
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Pyrolysis and CO(2)-gasification behavior of lignites representing four different deposits in Turkey were investigated by Thermogravimetric Analysis (TGA) in the temperature range from 750 degrees C to 1000 degrees C. The rates of pyrolysis and CO(2)-gasification were evaluated from the corresponding TGA profiles. As expected, maximum pyrolysis rates for each coal were shown to be constant with respect to the final carbonization temperature. Lignites used in this study are from the tertiary period, chosen from major coal deposits in Turkey and their carbon contents are in the range of 60-70% (daf) based on ultimate analysis. They have shown different gasification reactivities under similar conditions and the reactivity sequence was found to be temperature dependent.