Investigation of Swelling Properties and Liquefaction of Solid Fuels

Yıl 2023, Cilt: 16 Sayı: 1, 14 - 23, 12.10.2023

Ahmet Turan Tekeş , Aslıhan Aycan Tanrıverdi , Ahmet Muammer Canel

https://doi.org/10.58688/kujs.1120954

Öz

In this study, the effect of various parameters on the swelling of Edirne Uzunköprü, Edirne Keşan Çanakkale Yeniçirpılar and Bursa Mustafa Kemal Paşa lignites was investigated. In the first part of the study, swelling processes were applied to the lignites. Swelling measurements were made in closed glass tubes using 10 different solvents. Swelling ratios of lignite samples treated with solvents were determined and the dependence of these ratios on the properties of the solvent was examined. In the second part, the original lignite samples, swollen with various solvents, were subjected to soxhlet extraction with THF and the liquid product yields obtained from each sample were determined. Then, the same samples were extracted with toluene under supercritical conditions, and the effects of temperature, pressure, and pre-expansion on the extract yield were investigated. Extract yields of lignite samples swollen with solvents such as THF, TBAH, DMSO, DMF, and EDA were found to be higher than those of other solvents. The common features of these solvents are that they have atoms containing unpaired electrons such as N, O, etc. In addition, it was thought that the high extract yields of solvents with a large and positive difference in the number of donors and acceptors may be related to the breaking of the cross-links in the lignites by the solvent.

Anahtar Kelimeler

Lignite, solvent blowing, catalyst, supercritical extraction

Destekleyen Kurum

-

Teşekkür

-

Katı Yakıtların Şişme Özelliklerinin İncelenmesi ve Sıvılaştırılması

Öz

Bu çalışmada Edirne Uzunköprü, Edirne Keşan Çanakkale Yeniçırpılar ve Bursa Mustafa Kemal Paşa linyitlerinin şişirilmesine çeşitli parametrelerin etkisi incelenmiştir. Çalışmanın ilk bölümünde, linyitlere şişme işlemleri uygulanmıştır. Şişme ölçümleri ağzı kapalı cam tüplerde 10 ayrı çözücü kullanılarak yapılmıştır. Çözücülerle işlem gören linyit örneklerinin şişme oranları belirlenmiş ve bu oranların çözücünün özelliklerine bağlılığı irdelenmiştir. İkinci bölümde ise orjinal linyit, çeşitli çözücülerle şişirilmiş linyit örnekleri, THF ile soxhlet ekstraksiyonuna tabi tutulmuş ve her bir örnekten elde edilen sıvı ürün verimleri belirlenmiştir. Daha sonra aynı örnekler toluen ile süperkritik koşullarda ekstrakte edilerek sıcaklığın, basıncın ve ön şişirme işleminin ekstrakt verimine etkisi incelenmiştir. THF, TBAH, DMSO, DMF ve EDA gibi çözücülerle şişirilen linyit örneklerinin ekstrakt verimlerinin diğer çözücülerinkinden yüksek olduğu bulunmuştur. Bu çözücülerin ortak özellikleri yapısında N gibi O gibi ortaklanmamış elektron bulunduran atomlara sahip olmalarıdır. Ayrıca donör sayısı – akseptör sayısı farkı büyük ve pozitif olan çözücülerin ekstrakt verimlerinin büyük olmasının linyitlerdeki çapraz bağların çözücü tarafından koparılmasıyla ilişkili olabileceği düşünülmüştür.

Anahtar Kelimeler

Linyit, çözücü ile şişirme, katalizör, kritik üstü ekstraksiyon

Kaynakça

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