Oil shale kinetics by differential methods

Date

2007-06-01

Author

Kök, Mustafa Verşan

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In this research, pyrolysis and combustion behavior of three different oil shale samples from Turkey were characterized using thermal analysis techniques (TG/DTG). In pyrolysis experiments, two different mechanisms causing mass loss were observed as distillation and cracking. In combustion experiments, two distinct exothermic peaks were identified known low and high temperature oxidation. On the other hand, determination of activation energies are required for the estimation of oil extraction conditions from the oil shales. Differential methods are used to determine the activation energies of the samples where various f(alpha) models are applied from the literature. It was observed that the activation energies of the all oil shale samples are varied between 13.1-215.4 kJ mol(-1) in pyrolysis and 13.1-408.4 kJ mol(-1) in combustion experiments which are consistent with other kinetic results.

Subject Keywords

Physical and Theoretical Chemistry, Condensed Matter Physics, Activation energy, Combustion, Kinetics, Oil shale, Pyrolysis, Thermal analysis

URI

https://hdl.handle.net/11511/40004

Journal

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

DOI

https://doi.org/10.1007/s10973-006-8027-y

Collections

Department of Petroleum and Natural Gas Engineering, Article

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Oil shale: Pyrolysis, combustion, and environment: A review Kök, Mustafa Verşan (2002-02-01) In this study, instances where combustion techniques have been applied for oil shale characterization, kinetics, and effect on environment are reviewed. The major themes of the review were the composition, geochemistry, advanced spectroscopic and pyrolysis techniques, thermal analysis (differential scanning calorimetry, thermogravimetry, differential thermal analysis), conversion including static and fluid bed retorting, and environmental considerations.
Light crude oil combustion in the presence of limestone matrix Kök, Mustafa Verşan; Keskin, C; Madarasz, J; Bagci, S (Springer Science and Business Media LLC, 2004-01-01) In this study the combustion characteristics of crude oils (Karakus and Beykan) in the presence of a limestone matrix were determined using the thermogravimetry (TG/DTG). Experiments were performed at a heating rate of 10degreesC min(-1), whereas the air flow rate was kept constant at 10 L h(-1) in the temperature range of 20-900degreesC. In combustion with air, three distinct reaction regions were identified in all crude oil/limestone mixtures studied known as low temperature oxidation (LTO), fuel depositi...
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.
Influence of reservoir rock composition on the combustion kinetics of crude oil Kök, Mustafa Verşan (Springer Science and Business Media LLC, 2009-08-01) In this research, the effect of different lithology (limestone and sandstone) on the combustion of light crude oils was investigated using thermal analysis techniques. Three distinct reaction regions were identified in all of the crude oil+limestone and sandstone mixtures, known as low temperature oxidation (LTO), fuel deposition (FD) and high temperature oxidation (HTO), respectively. Kinetic analysis of the crude oil+limestone and sandstone mixtures was performed using Coats and Redfern method and the res...
Non-isothermal kinetic analysis and feasibilty study of medium grade crude oil field Kök, Mustafa Verşan (Springer Science and Business Media LLC, 2008-03-01) In this research, non-isothermal kinetics and feasibility study of medium grade crude oil is studied in the presence of a limestone matrix. Experiments were performed at a heating rate of 10 degrees C min(-1), whereas the air flow rate was kept constant at 50 mL min(-1) in the temperature range of 20 to 600 degrees C (DSC) and 20 to 900 degrees C (TG). In combustion with air, three distinct reaction regions were identified in all crude oil/limestone mixtures, known as low temperature oxidation (LTO), fuel d...

Citation Formats

M. V. Kök, “Oil shale kinetics by differential methods,” JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, pp. 657–661, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40004.