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Population-balance model of physical transformations of ash during char oxidation

โœ Scribed by Alan R. Kerstein

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
940 KB
Volume
77
Category
Article
ISSN
0010-2180

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โœฆ Synopsis

A population-balance model, involving a set of coupled rate equations, is formulated to represent the agglomeration of fused ash droplets on the surface of an oxidizing char particle. Numerical solutions reproduce several features and trends obtained previously by Monte Carlo simulation. The present formulation identifies the key aspect of this phenomenoiogy, namely the competition between the relaxation to a steady-state surface-droplet distribution and the departure from this steady state due to the increasing curvature of the particle perimeter. A principal consequence of this competition is that the mean surface-droplet diameter is predicted to exhibit an inflection point when plotted as a function of particle radius or fractional conversion.

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