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LİNYİTLERİN YAPISAL ÖZELLİKLERİ VE ISIL DEĞERLERİ ÜZERİNE OKSİDASYONUN ETKİSİ

THE EFFECT OF OXIDATION ON THE STRUCTURE PROPERTIES AND CALORIFIC VALUES OF LIGNITES

Journal Name:

  • Sigma Mühendislik ve Fen Bilimleri Dergisi

Publication Year:

  • 2004

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Information on the change of oxygen functional groups in the oxidizing coal is important to coal utilization particularly for lower rank coal which has high oxygen content. In this work, effect of oxidation on the structure properties and calorific values of lignites was investigated by using two different Turkish lignites. Lignite samples were oxidized by air circulation and in aqueous media, solution of hydrogen peroxide (5%H2 O2). FT-i.r. technique was applied to the original and oxidized lignite samples to investigate functional group analyses. The results indicated that oxidation reaction caused a decrease in the aliphatic C-H stretching bands, whereas it lead to a significant increase in the C=O, C-O, and -OH stretching absorption bands.
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Abstract (Original Language): 
Oksitlenmiş kömürlerde bulunan oksijen bağlı fonksiyonel grupların değişimi, özellikle yüksek oksijen içeren düşük ranklı kömürlerin kullanımı için önemlidir. Bu çalışmada, oksidasyonun linyitlerin yapısal özellikleri ve ısıl değerleri üzerine etkileri, iki farklı Türk linyiti kullanarak araştırılmıştır. Linyit numuneleri, hava sirkülasyonu ve hidrojenperoksit çözeltisi (5%H2 O2) ile muamele edilerek oksitlendirilmiştir. FT-i.r tekniği kullanılarak orjinal ve oksitlendirilmiş linyit numunelerinin fonksiyonel grup analizleri yapılmıştır. Sonuçlar, oksidasyon reaksiyonlarının alifatik C-H absorbsiyon bandlarında azalmaya, C=O, C-O, -OH absorbsiyon bantlarında önemli derecede artışa neden olduğuna işaret etmektedir.
FULL TEXT (PDF): 
PDF icon arastrmx_845_22_pp_43-49.pdf
  • 3
43-49
  • Turkish

REFERENCES

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