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Application of a DAEM Method for a Comparison of Devolatilization Kinetics of Imported Coals  

Kim, Ryang Gyoon (Department of Mechanical Engineering, Pusan National University, Eaesl)
Song, Ju Hun (Department of Mechanical Engineering, Pusan National University, PGSL)
Lee, Byoung Hwa (Department of Mechanical Engineering, Pusan National University, Ecsl)
Chang, Young June (Department of Mechanical Engineering, Pusan National University, Eaesl)
Jeon, Chung Hwan (Department of Mechanical Engineering, Pusan National University, Ecsl)
Publication Information
Korean Chemical Engineering Research / v.48, no.1, 2010 , pp. 110-115 More about this Journal
Abstract
The experiment was designed to compare pyrolysis kinetics of two different classes of imported coal. The pyrolysis behaviors of the coals were first observed with thermogravimetric analyzer(TGA). The kinetic analysis was further done based on a new distributed activation energy model(New DAEM). During the analysis, weight loss curves measured at three different heating rates were used to obtain the activation energy distribution function curve f(E) of a given coal sample where a mean activation energy is determined by its peak. The results show a significant difference in the mean activation energy between two coals for the pyrolytic reaction. The prediction of a chemical percolation devolatilization(CPD) model where the kinetics obtained from the New DAEM method were incorporated is in much closer agreement with an experimental data of TGA particularly for the bituminous coal.
Keywords
Devolatilization; Kinetics; New Distributed Activation Energy Model(New DAEM); Chemical Percolation Devolatilization(CPD) Model;
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