Combustion characteristics of lignite and oil shale samples by thermal analysis techniques

Date

2004-01-01

Author

Kök, Mustafa Verşan
Keskin, C
Madarasz, J
Bagci, S

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In this research thermal analysis and kinetics of ten lignite's and two oil shale samples of different origin were performed using a TA 2960 thermal analysis system with themogravimetry (TG/DTG) and differential al analysis (DTA) modules. Experiments were performed with a sample size of similar to10 mg, heating rate of 10degreesC min(-1). Flow rate was kept constant (10 L h(-1)) in the temperature range of 20-900degreesC. Mainly three different reaction regions were observed in most of the samples studied. The first region was due to the evaporation of moisture in the sample. The second region was chic to the release of volatile matter and burning of carbon and called as primary reaction region. Third region Was due to the decomposition of mineral matter in samples studied. In kinetic calculations, oxidation of lignite and oil shale is described by first-order kinetics. Depending on the characteristics of the samples, the activation energy values are varied and the results are discussed.

Subject Keywords

Thermal analysis, Oil shale, Lignite, Kinetics, Coal, Activation energy

URI

https://hdl.handle.net/11511/42338

Journal

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

DOI

https://doi.org/10.1023/b:jtan.0000027823.17643.5b

Collections

Department of Petroleum and Natural Gas Engineering, Article

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Citation Formats

M. V. Kök, C. Keskin, J. Madarasz, and S. Bagci, “Combustion characteristics of lignite and oil shale samples by thermal analysis techniques,” JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, pp. 247–254, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42338.