The influence on carbon combustion of the microporous area and of the
residues from devolatilization of macerals of original coals has been
studied in chemical kinetics controlled regime. Three chars, a metallu
rgical coke, a pure graphite and a synthetic carbon, widely differing
in porosity, surface area and maceral composition have been examined.
Basing on experimental findings, a literature model has been modified
to predict the combustion rate vs conversion curves for all the materi
als tested.