The Combustion Behavior and Kinetics of Dost (Oltu) Coal

Year 2017, Volume: 10 Issue: 1, 148 - 155, 28.06.2017

Jale Naktiyok A. Kadir Özer M. Şahin Gülaboğlu

Abstract

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 (E_a) calculated by KAS and FWO methods were
81.38 and 87.82 kJ mol^-1.

Keywords

Coal, Combustion, Thermal Analysis, KAS-FWO

The Combustion Behavior and Kinetics of Dost (Oltu) Coal

Abstract

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.

Keywords

Kömür, Yanma, Termal Analiz, KAS-FWO

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