Effect of cleaning process on the combustion characteristics of two different rank coals

Date

2001-11-01

Author

Kök, Mustafa Verşan
Hicyilmaz, C.
Ozbas, K.E.

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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In this research, thermogravimetry (TG/DTG) was used to determine the combustion characteristics of two different rank coals (Tuncbilek and Af in Elbistan) before and after cleaning process. Applying sink-float process cleaned raw coal samples, and optimum-separating densities for each sample was determined using the criteria of "degree of washability". The results indicated that coal cleaning was very effective on Tuncbilek sample due to its high rank. TG/DTG analysis of raw and cleaned samples indicated different reaction regions occurring at different temperature intervals. Easy combustibility and long-lasting combustion were the distinctive effects of coal cleaning on raw coals. Kinetic analysis of the samples showed that clean coals require lower activation energies to initiate the combustion process than raw coals.

Subject Keywords

Pyrolysis kinetics, Thermal-analysis, Particle-size, Thermogravimetry, Lignite

URI

https://hdl.handle.net/11511/42901

Collections

Department of Petroleum and Natural Gas Engineering, Article