Chlorination kinetics of pyrite mineral in two Turkish lignites

KARACA S., KADIOĞLU Y., Bayrakçeken S., Şahin Gülaboǧlu M. Ş.

Fuel Processing Technology, cilt.50, sa.2-3, ss.225-234, 1997 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50 Sayı: 2-3
  • Basım Tarihi: 1997
  • Doi Numarası: 10.1016/s0378-3820(96)01061-2
  • Dergi Adı: Fuel Processing Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.225-234
  • Anahtar Kelimeler: Chlorination kinetics, Pyrite mineral, Turkish lignites
  • Erzincan Binali Yıldırım Üniversitesi Adresli: Hayır

Özet

The kinetics of the chlorination of pyrite in two Turkish lignites in water and water-carbon tetrachloride media at ambient pressure (≅610 mm Hg) are investigated. The effects of speed of stirring (5-20 s-1) particle size (74-88, 150-180 and 250-425 μm), temperature (13-70°C) and reaction time (0-18 000 s) were studied. The experimental data were analyzed on the basis of the unreacted shrinking core model. The fine pyrite particles are assumed to be embedded inside the coal particles. The rate-controlling step was found to be diffusion of chlorine through the ash (the coal matrix). The activation energies were calculated as 25.1 kJ mol-1 for Dadaǧi coal in water medium and 25.0 kJ mol-1 for Mengen coal in water-carbon tetrachloride medium. © 1997 Elsevier Science B.V.