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A generalized heat transfer and devolatilization model coupled with the thermal balance between the heating gas and particles was established to predict the complex coal pyrolysis behaviors in the practical plasma reactors. It was proved that this model could well describe the coal devolatilization behaviors in both the pilot‐scale and lab‐scale plasma reactors as the mechanisms of coal chemistry...
Devolatilization is acknowledged as the first important step in coal conversion techniques. A comprehensive heat transfer and devolatilization model was established, with special consideration of the particle‐scale physics and chemistry, to predict the internal heat transport and pyrolysis behavior of particles. The chemical percolation devolatilization model with corrected kinetic parameters and...
Experiments were carried out in a drop tube furnace and a lab-scale plasma reactor to investigate the effects of coal properties, particle ultimate temperature and heating rate (i.e., 10 −1 to 10 1 K/s for slow pyrolysis, 10 2 to 10 4 K/s for fast pyrolysis and 10 4 to 10 6 K/s for rapid plasma pyrolysis processes) on coal devolatilization performances...
Thermodynamic analyses are performed for solar thermal steam and dry gasification of coal. The selected types of coal are anthracite, bituminous, lignite and peat. Two model conversion paths are considered for each combination of the gasifying agent and the coal type: production of the synthesis gas with its subsequent use in a combined cycle power plant to generate power, and production of the synthesis...
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