Journal
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
Volume 39, Issue 14, Pages 1478-1483Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15567036.2016.1278488
Keywords
Activation energy; char; devolatilization; heating rate; tar
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Coal as a form of fossil fuel may be utilized in two thermochemical techniques: directly by combustion of coal particles and indirectly by converting it into valuable products. In this research, a kinetic model of coal devolatilization has been developed based on the Arrhenius expression. To validate the model, an experimental study also has been performed in a drop-tube fluidized bed. There was reasonably good agreement between modeling data and experimental data obtained from single-tube fluidized bed. The effects of reaction temperature on the pyrolysis products and fuel conversion were studied. As a result, the maximum tar yield obtained was 28.3 (%) at 400 degrees C. An increase in activation energy was led to a relative decrease in the fuel conversion maybe due to a decrease of heating rate.
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