Evaluation of combustion characteristics of different size elbistan lignite by using TG/DTG and DTA

Sis H.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, cilt.88, sa.3, ss.863-870, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 88 Sayı: 3
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1007/s10973-005-7447-4
  • Dergi Adı: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.863-870
  • Anahtar Kelimeler: activation energy, combustion, lignite, particle size, thermal analysis, COAL COMBUSTION, PARTICLE-SIZE, REACTIVITY, BEHAVIOR, KINETICS
  • İnönü Üniversitesi Adresli: Evet

Özet

In this research, the relationship between particle size and combustion kinetics and combustion proper-ties of lignite samples was examined by utilizing the thermogravimetric (TG/DTG) and differential thermal analysis (DTA) techniques. The lignite samples separated into different size fractions were subjected to non-isothermal thermogravi metric analysis between ambient and 900 degrees C in the presence of 50 mL min(-1) air flow rate. Activation energy (E) and Arrhenius constant (A(Gamma)) of combustion reaction of each size was evaluated by applying Arrhenius kinetic model to the resulting data. Combustion properties of the samples were interpreted by careful examination of the curves. The apparent activation energies in major combustion region were calculated as 41.03 and 53.110 mol(-1) for the largest size (-2360+2000 mu m) and the finest size (-38 mu m), respectively.