The swelling behaviour of coal and maceral groups in some solvents and effects on the extraction­

ABSTRACTPh.D. THESISTHE SWELLING BEHAVIOUR OF COAL AND MACERAL GROUPS INSOME SOLVENTS AND EFFECTS ON THE EXTRACTIONÖzgür SÖNMEZDEPARTMENT OF CHEMISTRYINSTITUTE OF NATURAL AND APPLIED SCIENCESUNIVERSTY OF CUKUROVASupervisor : Prof. Dr. E. Sultan GİRAYYear : 2006, Pages: 112Jury : Prof. Dr. E. Sultan GİRAY: Prof. Dr. Hunay EVLİYA: Prof. Dr. Mesut ANIL: Prof. Dr. Oktay ERBATUR: Prof. Dr. O.Mete KOÇKARIn this study; the solvent swelling behaviors of Nasifoğlu and Soma coalswere investigated using the solvents which can/cannot form H bonds. The maceralconcentrates obtained from Nasifoğlu coal were also examined. Liquefactionbehaviors of Nasifoğlu coal and its macerals with NMP/CS2 mixed solvent andsupercritical toluen were studied. The best swelling ratio was obtained using EDA.The swelling ratio for Nasifoğlu coal was 1.81 while that value was 2.16 for Somacoal. It was observed that swelling was increased significantly after demineralization.The highest and lowest swelling ratios were obtained with NSF 1.28 and NSF 1.32,respectively among all maceral compositions. The most efficient extraction wasobserved with NSF 1.30 which had high content of vitrinite while NSF 1.40 whichwith high content of inertinite had lowest extraction yield during NMP/CS2extraction. The conversion of macerals was higher than parent coal Nasifoğlu duringsupercritical toluen extraction. The highest and lowest conversions were observed inNSF 1.28 and NSF 1.40, respectively. The extraction efficiency decreased bypreswelling in NMP/CS2 extraction and increased at supercritical conditions. Theexperiment results show that the best model for Nasifoğlu coal and its macerals wascovalent model.Keywords: Coal, maceral, solvent swelling, solvent extraction