Mineral maddenin kömürün karbonizasyonuna etkisi
Effect of mineral matter on the carbonization of coal
- Tez No: 39225
- Danışmanlar: PROF.DR. SADRİYE KÜÇÜKBAYRAK
- Tez Türü: Yüksek Lisans
- Konular: Kimya Mühendisliği, Chemical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1993
- Dil: Türkçe
- Üniversite: İstanbul Teknik Üniversitesi
- Enstitü: Fen Bilimleri Enstitüsü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 85
Özet
for 3D rrıin to remove all traces of oxygen. The flow rate of the nitrogen was fixed at kO cc/min. The chart speed Idas selected as 5 mm/min. The temperature mas raised with a heating rate of 40 K/min to 1423 K and held at this temperature after the weight was constant. The proximate analyses of the coal samples and the chemical analyses of the ashes were carried out according to the ASTM standards. Determination of the total mineral matter of the lignite samples was carried out occording to the ISO-602 standard. The demineralisation of the lignite samples was performed by treatment with hydrochloric and hydrofluoric acids. The porosity of the coal samples was measured by using a mercury porosimeter. The DTG curves of the samples were derived from TG applications. The TG and DTG curves of the original and demineralised lignite samples were compared and discussed. The mineral matter content of the lignite samples plays an important role in determining the carbonisation characteristics of the lignite samples. Xll
Özet (Çeviri)
of 4^. 1 uıt.%. In most cases, concentrations of trace minerals are in the ppm range. The purpose of this study was to examine the effect of the mineral matter on the carbonization of some Turkish lignites. The lignite samples are from: 1)- Cayirhan- Ankara 2)- Aşkale- Erzurum 3)- Bağyaka- Muğla 4)- Merkeşler- Bolu 5)- Dodurga- Çorum 6)- Akpınar- istanbul 7)- Mihalççık- Eskişehir 8)- Milas- Muğla 9)- Orhaneli- Bursa 10)- Tepebaşı- Konya 11 )- Yatağan- Muğla The carbonization of the lighite samples was carried out using a thermogravimetric analyser. The thermal analysis technique of thermogravimetry (TG) is one in which the change in sample mass (massloss or gain) is determined as a function of temperature and/or time. The resulting mass-change versus temperature curve provides information concerning the thermal stability and composition of the initial sample, the thermal stability, and composition of any intermediate compounds that may be formed, and the composition of the residue, if any. To yield usuful information with this technique, the sample must evolve a volatile product, which can originate by various physical and chemical processes. The rate of decomposition reactions occurring in coal under the action of heat may best be studied by means of TG. The weight curves obtained make it possible to derive the rate of loss in weight as a function of temperature and time. Thermogravimetric analysis was carried out using a Shimadzu TG 41 thermal analyser. kQ mg lignite samples which have been ground to pass a 0.25 mm sieve were spread uniformly on the bottom of the crucible made of alumina. Before heating, the system was flushed with dry nitrogen XIfor 3D rrıin to remove all traces of oxygen. The flow rate of the nitrogen was fixed at kO cc/min. The chart speed Idas selected as 5 mm/min. The temperature mas raised with a heating rate of 40 K/min to 1423 K and held at this temperature after the weight was constant. The proximate analyses of the coal samples and the chemical analyses of the ashes were carried out according to the ASTM standards. Determination of the total mineral matter of the lignite samples was carried out occording to the ISO-602 standard. The demineralisation of the lignite samples was performed by treatment with hydrochloric and hydrofluoric acids. The porosity of the coal samples was measured by using a mercury porosimeter. The DTG curves of the samples were derived from TG applications. The TG and DTG curves of the original and demineralised lignite samples were compared and discussed. The mineral matter content of the lignite samples plays an important role in determining the carbonisation characteristics of the lignite samples. Xllof 4^. 1 uıt.%. In most cases, concentrations of trace minerals are in the ppm range. The purpose of this study was to examine the effect of the mineral matter on the carbonization of some Turkish lignites. The lignite samples are from: 1)- Cayirhan- Ankara 2)- Aşkale- Erzurum 3)- Bağyaka- Muğla 4)- Merkeşler- Bolu 5)- Dodurga- Çorum 6)- Akpınar- istanbul 7)- Mihalççık- Eskişehir 8)- Milas- Muğla 9)- Orhaneli- Bursa 10)- Tepebaşı- Konya 11 )- Yatağan- Muğla The carbonization of the lighite samples was carried out using a thermogravimetric analyser. The thermal analysis technique of thermogravimetry (TG) is one in which the change in sample mass (massloss or gain) is determined as a function of temperature and/or time. The resulting mass-change versus temperature curve provides information concerning the thermal stability and composition of the initial sample, the thermal stability, and composition of any intermediate compounds that may be formed, and the composition of the residue, if any. To yield usuful information with this technique, the sample must evolve a volatile product, which can originate by various physical and chemical processes. The rate of decomposition reactions occurring in coal under the action of heat may best be studied by means of TG. The weight curves obtained make it possible to derive the rate of loss in weight as a function of temperature and time. Thermogravimetric analysis was carried out using a Shimadzu TG 41 thermal analyser. kQ mg lignite samples which have been ground to pass a 0.25 mm sieve were spread uniformly on the bottom of the crucible made of alumina. Before heating, the system was flushed with dry nitrogen XIfor 3D rrıin to remove all traces of oxygen. The flow rate of the nitrogen was fixed at kO cc/min. The chart speed Idas selected as 5 mm/min. The temperature mas raised with a heating rate of 40 K/min to 1423 K and held at this temperature after the weight was constant. The proximate analyses of the coal samples and the chemical analyses of the ashes were carried out according to the ASTM standards. Determination of the total mineral matter of the lignite samples was carried out occording to the ISO-602 standard. The demineralisation of the lignite samples was performed by treatment with hydrochloric and hydrofluoric acids. The porosity of the coal samples was measured by using a mercury porosimeter. The DTG curves of the samples were derived from TG applications. The TG and DTG curves of the original and demineralised lignite samples were compared and discussed. The mineral matter content of the lignite samples plays an important role in determining the carbonisation characteristics of the lignite samples. Xllof 4^. 1 uıt.%. In most cases, concentrations of trace minerals are in the ppm range. The purpose of this study was to examine the effect of the mineral matter on the carbonization of some Turkish lignites. The lignite samples are from: 1)- Cayirhan- Ankara 2)- Aşkale- Erzurum 3)- Bağyaka- Muğla 4)- Merkeşler- Bolu 5)- Dodurga- Çorum 6)- Akpınar- istanbul 7)- Mihalççık- Eskişehir 8)- Milas- Muğla 9)- Orhaneli- Bursa 10)- Tepebaşı- Konya 11 )- Yatağan- Muğla The carbonization of the lighite samples was carried out using a thermogravimetric analyser. The thermal analysis technique of thermogravimetry (TG) is one in which the change in sample mass (massloss or gain) is determined as a function of temperature and/or time. The resulting mass-change versus temperature curve provides information concerning the thermal stability and composition of the initial sample, the thermal stability, and composition of any intermediate compounds that may be formed, and the composition of the residue, if any. To yield usuful information with this technique, the sample must evolve a volatile product, which can originate by various physical and chemical processes. The rate of decomposition reactions occurring in coal under the action of heat may best be studied by means of TG. The weight curves obtained make it possible to derive the rate of loss in weight as a function of temperature and time. Thermogravimetric analysis was carried out using a Shimadzu TG 41 thermal analyser. kQ mg lignite samples which have been ground to pass a 0.25 mm sieve were spread uniformly on the bottom of the crucible made of alumina. Before heating, the system was flushed with dry nitrogen XIfor 3D rrıin to remove all traces of oxygen. The flow rate of the nitrogen was fixed at kO cc/min. The chart speed Idas selected as 5 mm/min. The temperature mas raised with a heating rate of 40 K/min to 1423 K and held at this temperature after the weight was constant. The proximate analyses of the coal samples and the chemical analyses of the ashes were carried out according to the ASTM standards. Determination of the total mineral matter of the lignite samples was carried out occording to the ISO-602 standard. The demineralisation of the lignite samples was performed by treatment with hydrochloric and hydrofluoric acids. The porosity of the coal samples was measured by using a mercury porosimeter. The DTG curves of the samples were derived from TG applications. The TG and DTG curves of the original and demineralised lignite samples were compared and discussed. The mineral matter content of the lignite samples plays an important role in determining the carbonisation characteristics of the lignite samples. Xll
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