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Pyrolysis, Combustion, and Fragmentation Model of Coal Particles: Preliminary Results

descriptionPublicationkeyboard_double_arrow_right Article , Conference object , Journal 03 May 2016 Italy Publisher:Informa UK LimitedJournal:Combustion Science and Technology, volume 188, pages 759-768 (issn: 0010-2202, eissn: 1563-521X,

Authors: Senneca Osvalda; Urciuolo Massimo; Bareschino Piero; Diglio Giuseppe; Pepe Francesco; Chirone Riccardo;

doi: 10.1080/00102202.2016.1138763

handle: 20.500.14243/306228 , 20.500.14243/324168

Pyrolysis, Combustion, and Fragmentation Model of Coal Particles: Preliminary Results

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Abstract

A mathematical model has been developed to predict fragmentation of particles under a wide range of pyrolysis and combustion conditions. The model is an upgrade of a previous one that took into account only fragmentation during the heat up and devolatilization stage. The model calculates the temperature and oxygen profiles within the particle, the evolution of internal porosity as a consequence of both devolatilization and carbon combustion, the mechanical stress caused by temperature gradients, and by volatiles-generated overpressure inside the particles. Eventually the model calculates the probability of rupture of the particle based on the Weibull (1939) theory. The model has been used to simulate heating of coal particles under inert conditions at different heating rates and temperatures showing good agreement with previous work. The model has been further used to simulate heating under oxidative conditions in order to highlight the role of combustion on fragmentation phenomena.

Country

Italy

Related Organizations

University of Sannio
Italy
University of Sannio
Italy
National Research Council
Italy
Institute for Research on Combustion
Italy

Keywords

Fragmentation; Heat treatment; Coal; Combustion, Coal, Fragmentation, Combustion, Heat treatment

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