Öz
Bu çalışmada üç farklı kömürün hava atmosferinde yanma prosesleri termal analiz (TG-DTG/DSC) cihazı ile incelendi. Termogravimetrik analiz deneyleri için 25°C’den 1000°C’ye kadar hava atmosferinde 10°C/dak ısıtma hızında çalışıldı. TG-DTG/DSC verilerinden faydalanarak örneklerin hem ana yanma bölgesi için gerekli olan aktivasyon enerjileri hesaplandı, hem de kendiliğinden ısınma sıcaklıkları belirlendi. Yanma kinetiği için modele bağlı (model fitting) metotlardan olan Ortega metodu uygulandı. Buna göre EK kömürünün ana yanma bölgesine ait olan aktivasyon enerjisi 69.49 kJ/mol, TK kömürünün 86.77 kJ/mol ve YK kömürünün ise 77.34 kJ/mol’ dür. TK ve EK linyitlerinin kendiliğinden ısınma sıcaklıklarının oldukça düşük, YK kömürünün ise oldukça yüksek olduğu belirlendi. EK kömürünün düşük karbon, yüksek kül içeriğinden dolayı diğer kömürlere göre daha düşük tutuşma ve yanma sıcaklıklarına sahip iken YK kömürünün yüksek karbon ve düşük kül içeriğinden dolayı yüksek tutuşma ve yanma sıcaklıklarına sahip olduğu anlaşıldı.
Anahtar Kelimeler
Kömür TG-DTG/DSC Kinetik analiz Ortega metot Kendiliğinden ısınma
Kaynakça
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Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Konular | Mühendislik |
| Bölüm | Kimya Mühendisliği |
| Yazarlar | |
| Yayımlanma Tarihi | 3 Aralık 2022 |
| Gönderilme Tarihi | 8 Ağustos 2022 |
| Yayımlandığı Sayı | Yıl 2022Cilt: 25 Sayı: 4 |
