Chemical characteristics of supercritical toluene extracts from two turkish lignites
Fuel Science and Technology International, cilt.9, sa.7, ss.825-837, 1991 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 9 Sayı: 7
- Basım Tarihi: 1991
- Doi Numarası: 10.1080/08843759108942298
- Dergi Adı: Fuel Science and Technology International
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.825-837
- Ankara Üniversitesi Adresli: Evet
Özet
Samples from two major deposits of Turkish lignites were subjected to supercritical toluene extraction at 325°C and 14.1 MPa in an autoclave. The resultant extracts were separated into pre-asphaltene, asphaltene, saturates, aromatics and resin fractions by column chromatography. The fractions were characterized by 1H-NMR, 13C-NIVIR IR, and elemental analysis in order to compare the chemical composition of extracts from the two coal samples. The results show that the extracts from the Tungbilek (T-coal) deposits contain aliphatic constituent which is composed of mostly long chain unbranched alkyl compounds while the extracts from the Soma Merkeg (S-coal) deposits contain a significant amount of branched paraffinic compounds. The resin fractions from both samples were found to contain a significant amount of single ring aromatic compounds. Copyright © 1991, Taylor & Francis Group, LLC. All rights reserved.