Application of Model-free Methods for Analysis of Combustion Kinetics of Coals with Different Ranks


Sis H.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, cilt.31, ss.1016-1027, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 12
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1080/15567030802089037
  • Dergi Adı: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
  • Sayfa Sayıları: ss.1016-1027

Özet

Model-free kinetic approaches were employed to investigate the combustion kinetics of coals with different ranks, namely, lignite, bituminous coal, and anthracite. The experimental data were provided under non-isothermal conditions at different heating rates in the range of 2-25C min-1. The activation energy values were estimated by two model-free methods, that is, Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods. Slightly higher activation energy values were obtained by Ozawa-Flynn-Wall method at a wide range of conversion extent. Variation of activation energy was found to be comparably more significant for lower rank lignite (between 44.82 and 287.56 kJ mol-1) while less significant for higher rank bituminous coal (between 101.97 and 155.64 kJ mol-1) and anthracite (between 106.04 and 160.31 kJ mol-1).