Evaluation of Turkish oil shales - Thermal analysis approach

In this research, thermal characteristics of three Turkish oil shales (Himmetoglu, Beypazari and Hatuldag) were studied by thermal analysis techniques (differential scanning calorimetry, thermogravimetry and pressurised differential scanning calorimetry). Two distinct exothermic peaks were identified in all experiments known as low-temperature oxidation and high-temperature oxidation reaction regions. Kinetic data were analysed by Arrhenius, and Coats and Redfern models and the results are discussed.
Oil Shale


Application of TGA-MS technique for oil shale characterization and kinetics
Kök, Mustafa Verşan; Varfolomeev, Mikhail A.; Nurgaliev, Danis K.; Kandasamy, Jayaraman (2022-03-01)
Thermal characteristics and model free kinetics of four different oil shale samples were studied using simultaneous thermogravimetry-mass spectrometer (TGA-MS) analysis performed at three different heating rates and under air atmosphere. All the reaction regions and corresponding peak temperatures, mass loss, and the residue of oil shale samples were determined. Meanwhile, the main volatile products, primary alcohols, and aromatic compounds as products of oil shale combustion, were determined on the basis o...
Comparative Pyrolysis and Combustion Kinetics of Oil Shales
Kök, Mustafa Verşan (2000-02-01)
In this research, thermal characteristics and kinetic parameters of eight Turkish oil shale samples were determined by thermogravimetry (TG/DTG) at non-isothermal heating conditions both for pyrolysis and combustion processes. A general computer program was developed and the methods are compared with regard to their accuracy and the ease of interpretation of the kinetics of thermal decomposition. Activation energies of the samples were determined by five different methods and the results are discussed.
Thermal characterization of different origin class-G cements
Kök, Mustafa Verşan (2014-02-01)
In this study, thermal characteristics and kinetics of three different origin class-G cements (Mix, Bolu, and Nuh) were studied using thermogravimetry (TG/DTG) and differential scanning calorimeter (DSC). In DSC curves at different heating rates a number of peaks were observed consistently in different temperature intervals. TG/DTG is used to identify the detected phases and the corresponding mass loss. In the dehydration kinetic study of the different origin class-G cement samples, three different methods ...
The effect of lime addition on the combustion properties and sulfur contents of three different coals
Ozbas, Kazim Esber; Hiçyilmaz, Cahit; Kök, Mustafa Verşan (2002-01-01)
In this research, combustion characterization of 3 different coals of Turkey, from the Soma, Tuncbilek, and Afsin Elbistan regions, were investigated with thermal analysis techniques such as differential scanning calorimetry (DSC) and thermogravimetry (TG/DTG). Lime was added to these coals in concentrations of 3, 7, and 10% by weight to investigate the change in combustible sulfur content and sulfur in ash. It was observed that lime has a positive effect on sulfur emission. Kinetic analysis was also perfor...
Thermo-oxidative reactions of crude oils
Kök, Mustafa Verşan (Springer Science and Business Media LLC, 2011-08-01)
In this research, thermo-oxidative reactions of crude oils of different origin are determined in limestone matrix using simultaneous thermogravimetry and differential thermal analysis (TG-DTA) systems. Two different reaction regions were identified known as low temperature (LTO) and high temperature oxidation (HTO). Kinetic parameters of the samples were determined by four different methods and the results are discussed.
Citation Formats
M. V. Kök, “Evaluation of Turkish oil shales - Thermal analysis approach,” Oil Shale, pp. 131–138, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55746.