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Published on: June 12, 2019
Experimental study on drying and moisture re-adsorption kinetics of an Indonesian low rank coal
Xianchun Li1, Hui Song2, Qi Wang3
1School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China; School of Material Science and Engineering, University of Science and Technology Liaoning, Anshan 114051, China; Faculty of Energy and Power Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang 110136, China.
Abstract:
The drying kinetics of an Indonesian low rank coal and moisture re-adsorption of the dried coal using a thermobalance and a climatic chamber were investigated. Results show that the drying kinetics is best represented by two stages, as a constatnt rate stage followed by a rate decay stage. The water removal rate is dependent mainly on drying temperature and coal sample size. The apparent activation energy (E) of drying was 26.58 kJ/mol. A rate equation for drying of the coal was obtained from the experimental data. The moisture re-adsorption rate was dependent on drying temperature, coal particle size, and relative humidity of the atmosphere.
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