Thermogravimetric analysis of pretreated Turkish lignites

Ceylan, Kadim; Karaca, Hüseyın; Önal, Yunus

doi:10.1016/s0016-2361(99)00009-5

Cited by 36 publications

(28 citation statements)

References 24 publications

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“…Whereas only one thermal phenomenon is observed in the pyrolysis of reed and peat, two thermal phenomena occur in that of lignite and bituminous coal. In the case of blends, three and even four phenomena can be observed (Vuthaluru, 2004b;Ceylan et al, 1999). In blends with reed, only one stage takes place.…”

Section: Pyrolysismentioning

confidence: 99%

Pyrolysis by thermogravimetric analysis of blends of peat with coals of different characteristics and biomass

Sütçü

2007

Journal of the Chinese Institute of Chemical Engineers

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Section: Pyrolysismentioning

confidence: 99%

Pyrolysis by thermogravimetric analysis of blends of peat with coals of different characteristics and biomass

Sütçü

2007

Journal of the Chinese Institute of Chemical Engineers

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“…(8), the best value for n was searched in the range from 0.2 to 2.5 to get a straight line. The n value giving a straight line with a highest correlation coefficient was assumed to be the order of the overall pyrolysis and combustion reactions [20]. The main temperature range of volatile evolution (350-600°C) was always taken into account in the calculation and a regression factor, R 2 , was obtained in both processes [8,9,13].…”

Section: Combustion and Pyrolysis Characteristics Of Tunçblek Lignitementioning

confidence: 99%

Combustion and pyrolysis characteristics of tunçblek lignite

Elbeyli

Pişkin

2006

J Therm Anal Calorim

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In this study, thermal characteristics and kinetic parameters of cleaned Tunçbilek lignite were determined by using a Setaram Labsys DTA/TG/DSC thermal analysis system both for combustion and pyrolysis reactions. Experiments were performed at a heating rate of 10°C min -1 under reactive (air) and inert (nitrogen) gases up to 1000°C. Non-isothermal heating conditions were applied and reaction intervals were determined for combustion and pyrolysis reactions from obtained curves. The combustion properties were evaluation by considering the burning profile of the lignite sample. Burning temperatures and rate of combustion were determined from TG/DTG curves. Calorific value of the lignite sample was measured by DSC curve and compared with the adiabatic bomb calorimeter result.In addition to investigation of the combustion properties, pyrolysis characteristics of the lignite sample were investigated based on TG/DTG/DSC curves. Activation energy (E) and pre-exponential factor (A) were calculated from the TG data by using a Coats-Redfern kinetic model both for combustion and pyrolysis reactions of cleaned Tunçbilek lignite.

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“…Well known desulfurization processes include caustic treatment (NaOH, KOH, CaOH vs), acidic treatment (HCl, HNO 3 , H 2 SO 4 , HF, H 2 O 2 vs) and thermal treatment [1,18,22,[24][25][26][27][28]. Thermal treatment can be used efficiently for desulfurization of coals by both removal of organic sulfur species and pyrite decomposition prior to combustion.…”

Section: Chemical Desulfurizationmentioning

confidence: 99%

Characterization and Desulfurization Possibilities of High Sulfur Gediz-Turkey Coal

Demir¹

2017

JESE-A

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Abstract:Coal is one of the important energy sources, but it causes serious environmental problems such as air pollution, acid rain and greenhouse effects. Sulfur in coal is one of the responsibilities of these negative effects. Coal includes two types of sulfur: organic and inorganic. While inorganic sulfur can be completely removed with physical desulfurization methods, organic sulfur can be removed only by chemical desulfurization methods. But chemical methods are not only expensive but also difficult processes. Firstly in desulfurization, types of the sulfur content in coal should be well characterized. High sulfur Gediz-Turkey coal has been chosen to this study. This coal basin is located in the centre of the Turkey. In this study, characterization and desulfurization possibilities of high sulfur Gediz coal were investigated. For this purpose, several physical and chemical characterization methods such as proximate and ultimate coal analysis (ash, calorific value, volatile matter, moisture and sulfur analysis), mineralogical and petrographic analysis, fourier transform infrared spectroscopy, scanning electron microscope were used. Results of these analysis are shown that Gediz coals include 3.15% pyritic sulfur and 2.89% organic sulfur. Removing pyritic sulfur from Gediz-Turkey coal with physical methods such as gravity and sink-float separation is not possible because pyrite particle has 1-2 micron liberation size in coal.

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Thermogravimetric analysis of pretreated Turkish lignites

Cited by 36 publications

References 24 publications

Pyrolysis by thermogravimetric analysis of blends of peat with coals of different characteristics and biomass

Pyrolysis by thermogravimetric analysis of blends of peat with coals of different characteristics and biomass

Combustion and pyrolysis characteristics of tunçblek lignite

Characterization and Desulfurization Possibilities of High Sulfur Gediz-Turkey Coal

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