Kinetic analysis of DSC and thermogravimetry data for combustion of lignite

Date

1996-06-01

Author

Kök, Mustafa Verşan

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Thermal analysis increasingly being used to obtain kinetic data relating to sample decomposition. This work involves a comparative study of several methods used to analyse DSC and TG/DTG data obtained on the oxidation of Beypazari lignite. 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. For this study, the ratio method was regarded as the preferred method, because it permits the estimation of reaction order, activation energy and Arrhenius constant simultaneously from a single experiment.

Subject Keywords

Activation energy, Combustion, Differential scanning calorimetry, Kinetics, Lignite, Oxidation, Thermogravimetrie analysis

URI

https://hdl.handle.net/11511/83828

Journal

Journal of Thermal Analysis

Collections

Department of Petroleum and Natural Gas Engineering, Article

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Kinetic analysis of DSC and thermogravimetric data on combustion of lignite Kök, Mustafa Verşan (Springer Science and Business Media LLC, 1996-06-01) Thermal analysis increasingly being used to obtain kinetic data relating to sample decomposition. This work involves a comparative study of several methods used to analyse DSC and TG/DTG data obtained on the oxidation of Beypazari lignite. 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. For this study, the ratio method was regarded as the preferred method, because it permits the estim...
Kinetic analysis of in situ combustion processes with thermogravimetric and differential thermogravimetric analysis and reaction tube experiments Kök, Mustafa Verşan (1995-01-01) This research comprises the determination of kinetic parameters of in situ combustion processes by reaction tube and thermal (thermogravimetric analysis (TGA)/differential thermogravimetric analysis (DTGA)) experiments. A previously developed laboratory model and a Du Pont 9900 thermalanalyzer unit were used to run the experiments. Three reaction regions for combustion of crude oil in porous media were observed in the reaction tube and TGA/DTGA experiments and are defined as low temperature oxidation, fuel ...
ASTM kinetics of oil shales Kök, Mustafa Verşan (1998-01-01) Thermal analysis is increasingly being used to obtain kinetic data relating to sample decomposition. In this research differential scanning calorimeter (DSC) was used to determine the combustion kinetics of three (Can, Himmetoglu and Mengen) oil shale samples by ASTM and Roger & Morris methods. On DSC curves two reaction regions were observed on;oil shale sample studied except Can oil shale. In DSC experiments higher heating rates resulted in higher reaction temperatures and higher heat of reactions. Distin...
Thermal analysis applications in fossil fuel science - Literature survey Kök, Mustafa Verşan (2002-01-01) In this study, instances where thermal analysis techniques ( differential scanning calorimetry, thermogravimetry, differential thermal analysis, etc.) have been applied for fossil fuel characterisation and kinetics are reviewed. The scientific results presented clearly showed that thermal analysis is a well-established technique used in fossil fuel research area. The literature survey showed that thermal methods were important not only theoretically but also from a practical point of view.
Pyrolysis analysis and kinetics of crude oils Kök, Mustafa Verşan (1998-01-01) This research presents the results of an experimental study on the determination of pyrolysis behaviour and kinetics of six crude oils by differential scanning calorimetry (DSC) and thermogravimetry (TG/DTG). Crude oil pyrolysis indicated two main temperature ranges where loss of mass was observed. The first region between ambient to 400 degrees C was distillation. The second region between 400 and 600 degrees C was visbreaking and thermal cracking. Arrhenius-type kinetic model is used to determine the kine...

Citation Formats

M. V. Kök, “Kinetic analysis of DSC and thermogravimetry data for combustion of lignite,” Journal of Thermal Analysis, pp. 1657–1669, 1996, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/83828.