Biyokütle, arıtma çamuru ve linyit içeren yakıt karışımlarının yanma karakteristiklerinin, kinetiklerinin ve yanma indekslerinin termogravimetrik olarak incelenmesi

Öz

Bu çalışmada, gül posası (G), evsel arıtma çamuru (Ç) ve yerli Kale Linyiti (L) kullanılarak hazırlanan farklı oranlardaki yakıt karışımlarının termogravimetrik analizleri (TGA) yapılarak; yanma karakteristikleri, yanma indeksleri ve aktivasyon enerjileri incelenmiştir. Bu çalışmada üç farklı yakıt karışımı (%15Ç+%15G+%70L; %25Ç+%25G+%50L; %40Ç+%40G+%20L) hazırlanmıştır. Yakıt karışımlarının termal bozunmaları genel olarak dört bölgede gerçekleşmiştir. Bu çalışmada alev alma sıcaklıklarının karışımdaki çamur oranı arttıkça yükseldiği, son yanma sıcaklıklarında ise genel bir değişim olmadığı görülmektedir. Karışımların maksimum kütle kaybı hızları çamur oranı arttıkça artmış ve daha stabil bir yanma sağlamıştır. Yanma indeksleri açısından, linyite arıtma çamuru eklenmesinin yakıtın yanma karakteristiğini iyileştirdiği gözlemlenmiştir. Bu çalışmada hazırlanan yakıt karışımlarının aktivasyon enerjileri ise %15Ç+%15G+%70L için 86.68 kJ/mol, %25Ç+%25G+%50L için 107.20 kJ/mol, %40Ç+%40G+%20L için 114.07 kJ/mol ve %100 çamur için 160.05 kJ/mol olarak hesaplanmıştır. Dolayısıyla biyokütle ve linyitin arıtma çamurları ile termokimyasal kullanımının çevresel ve ekonomik açıdan önemli bir potansiyele sahip olduğu görülmektedir.

Anahtar Kelimeler

• Biyokütle
• Kinetik
• TGA
• Yanma Karakteristikleri

Thermogravimetric investigation of combustion characteristics, kinetics and combustion index of fuel blends with biomass, sewage sludge and lignite

Öz

In this study, the combustion characteristics, combustion index and activation energies were investigated by thermogravimetric analysis (TGA) of different proportions of fuel blends prepared using rose pulp (R), domestic sewage sludge (S) and local Kale Lignite (L). In this study, three different fuel blends (15%S+15%R+70%L; 25%S+25%R+50%L; 40%S+40%R+20%L) were prepared. Thermal degradation of the fuel blends occurred mainly in four regions. In this study, it was observed that the ignition temperatures increased with increasing sludge content in the blends, while there was no general change in the burnout combustion temperatures. The maximum mass loss rates of the blends increased with increasing sludge content and provided a more stable combustion. In terms of combustion index, it was observed that the addition of sewage sludge to lignite improved the combustion characteristics of the fuel. The activation energies of the fuel blends prepared in this study were calculated as 86.68 kJ/mole for 15%S+15%R+70%L, 107.20 kJ/mole for 25%S+25%R+50%L, 
114.07 kJ/mole for 40%S+40%R+20%L and 160.05 kJ/mole for 100% sludge. Therefore, it is seen that the thermochemical utilization of biomass and lignite with sewage sludge has a significant environmental and economic potential.

Anahtar Kelimeler

• Biomass
• Combustion Characteristics
• Kinetic
• TGA

Kaynakça

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