Application of Model-free Methods for Analysis of Combustion Kinetics of Coals with Different Ranks
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, cilt.31, sa.12, ss.1016-1027, 2009 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 31 Sayı: 12
- Basım Tarihi: 2009
- Doi Numarası: 10.1080/15567030802089037
- Dergi Adı: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1016-1027
- Anahtar Kelimeler: activation energy, coal rank, iso-conversional models, thermal analysis, VARYING ACTIVATION-ENERGIES, SOLID-STATE KINETICS, ISOCONVERSIONAL METHODS, COMPUTATIONAL ASPECTS, PROJECT, LIGNITE, PART
- İnönü Üniversitesi Adresli: Evet
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).