Göynük bitümlü şistinin kimyasal yapısına çözücü ve asit etkisinin incelenmesi
Effect of acid and organic solvent on chemical structure of Göynük oil shale
- Tez No: 66137
- Danışmanlar: DOÇ. DR. MURAT AZIK
- Tez Türü: Yüksek Lisans
- Konular: Kimya, Chemistry
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1997
- Dil: Türkçe
- Üniversite: Hacettepe Üniversitesi
- Enstitü: Fen Bilimleri Enstitüsü
- Ana Bilim Dalı: Kimya Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 93
Özet
vnı mineral matter containing samples were decomposed and softened at higher temperatures than the low mineral matter containing samples.VII inorganic materials more easily. It was concluded that the silicates were the key minerals in the structure, and as long as the silicates did not remove, hydrochloric acid and citric acid had limited effects on the inorganic materials. It was also found that HF/HC1/SA sequence was the most effective combination to remove the minerals from the oil shale. Acid treatments changed the molar H/C and O/C values of the oil shale. It was also observed from infrared analysis that during hydrochloric acid and citric acid treatments of the silicate free sample, carboxylic acids were formed from carboxylate groups and acid catalyzed esterification reactions were occurred between alcohols and carboxylic acid groups of the organic structure. The GC-MS analysis of all aqueous solutions of the acid-treated samples indicated that 1,2 benzenedicarboxylic acid dialkylesters were the main component of the dissolved organic material. The presence of the ester functional groups in both aqueous phase and macromolecular network showed that organic structure was partly changing and dissolving due to demineralization. In addition to the effect of citric acid on the esterification reactions, the extraction yields of the citric acid treated samples decreased due to the reorganization of the organic matter. The similar trend was also observed for solvent swelling indexes of the same samples. It was thought that the new covalent cross linkages and non-covalent interactions were formed during citric acid treatment. The thermal behavior of the original and demineralized samples were different from each other. The organic matter of the original and the
Özet (Çeviri)
vnı mineral matter containing samples were decomposed and softened at higher temperatures than the low mineral matter containing samples.VII inorganic materials more easily. It was concluded that the silicates were the key minerals in the structure, and as long as the silicates did not remove, hydrochloric acid and citric acid had limited effects on the inorganic materials. It was also found that HF/HC1/SA sequence was the most effective combination to remove the minerals from the oil shale. Acid treatments changed the molar H/C and O/C values of the oil shale. It was also observed from infrared analysis that during hydrochloric acid and citric acid treatments of the silicate free sample, carboxylic acids were formed from carboxylate groups and acid catalyzed esterification reactions were occurred between alcohols and carboxylic acid groups of the organic structure. The GC-MS analysis of all aqueous solutions of the acid-treated samples indicated that 1,2 benzenedicarboxylic acid dialkylesters were the main component of the dissolved organic material. The presence of the ester functional groups in both aqueous phase and macromolecular network showed that organic structure was partly changing and dissolving due to demineralization. In addition to the effect of citric acid on the esterification reactions, the extraction yields of the citric acid treated samples decreased due to the reorganization of the organic matter. The similar trend was also observed for solvent swelling indexes of the same samples. It was thought that the new covalent cross linkages and non-covalent interactions were formed during citric acid treatment. The thermal behavior of the original and demineralized samples were different from each other. The organic matter of the original and thevnı mineral matter containing samples were decomposed and softened at higher temperatures than the low mineral matter containing samples.
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FİLİZ TÜZBÜK
