The aim of this work was to investigate the effect that adding charcoal to a coking coalhas uponthe CO
2
reactivity
and structure of cokes produced at a laboratory scale. Charcoal was added to a vitrinite-rich medium volatile cok-
ing coal in three amounts (3, 5 and 8 wt%) and in two different particle size ranges (below 1 mm and between 3
and 4 mm) and carbonization was conducted in a laboratorial scale coke oven. Thermogravimetric analyses were
used to assess coke reactivity towards CO
2
under isothermal and nonisothermal conditions. Morphological anal-
yses via optical and scanning electron microscopies using samples from before and after gasi
fi
cation were also
carried out. It was found that controlling the amount and the particle size of charcoal added, coke reactivity
did not differ considerably from the reference coke, although the TGA indicated that the addition of charcoal
has the tendency to increase cokereactivity. The main structural changes due charcoal addition were the increase
of coke surface area and the decrease of its structural order, justifying the noticed increase of coke reactivity.