Jale NAKTİYOK, A. Kadir ÖZER, M. Şahin GÜLABOĞLU

The Combustion Behavior and Kinetics of Dost (Oltu) Coal

Dost kömürünün yanma davranışı ve kinetiği hakkında bilgi elde etmek için TG/DTA analizi yapılmıştır. Termal analiz verileri hava atmosferinde 298 K’den 1273 K’e kadar farklı ısıtma hızlarında (1, 2.5, 5 ve 10 K dak-1) elde edilmiştir. Isıtma hızı arttıkça tutuşma sıcaklığı ve sönme sıcaklıklarının da arttığı görülmektedir. Ayrıca serbest-model olan Kissinger-Akahira-Sunose (KAS) ve Flynn-Wall-Ozawa (FWO) metotlarını kullanarak kinetik parametreler tanımlanmaktadır. KAS ve FWO metotlarıyla hesaplanan aktivasyon enerjileri (Ea) sırasıyla 81.38 ve 87.82 kJ mol-1’dir.

Anahtar Kelimeler:

Kömür, Yanma, Termal Analiz, KAS-FWO

The Combustion Behavior and Kinetics of Dost (Oltu) Coal

TGA/DTA analysis was used to have the knowledge on the combustion behavior and kinetics of Dost coal. The thermal analysis data were obtained at different heating rates (1, 2.5, 5, and 10 Kmin-1) in air atmosphere from 298 to 1273 K. It is seen that when the heating rates increase, the ignition temperature and the burn out temperature increase. It is also determined the kinetic parameters by using two model-free methods, i.e. Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO). The activation energies (Ea) calculated by KAS and FWO methods were 81.38 and 87.82 kJ mol-1.

Keywords:

Coal, Combustion, Thermal Analysis, KAS-FWO,

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