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Coai is a worldwide fuel for large scale thennoelectric power generation. Whatever the clevice usecl for burning coai, t h e ult i mate reaction r ate depeneis on chemical kinet ics anel mass transpor! conelitions. Chemical kinetics is mainly defineel by process temperature, reacting atmosphere, chenlical composit ion anel physical structu re of the particles, anel particulate size. Mass transport externai to the react ing particles depeneis on fluicl mechanics, anel particulate size anel concentration. Mass transport internai to the reacting particles depeneis on intra-particle fluid mechanics, physical stlllcture of the particles anel pa11iculate size. This work aims to contribute for enhancing knowleelge regarding the int rinsic or intra-particle controllecl combustion rate of a particular CE4500 Brazilian coai. A stuely is carrieel out regareling coai combustion in thermogravimetric non-isothermal experiments, in air atmosphere. Evaluations are performed on reaction behavior regarding the mass anel particle size of the sample, anel the BET surface area anel the physical structurc of the coai anel the ashes. Jntrinsic reaction rale coeflicients are cstabli sheel for combust ion in condit íons identitíecl as primai)' anel seconelat)', the first accounting for the combined efYect of devolati lization anel fi xecl carbon combustion, anel the seconel accounting tà r fi xed carbon combustion alone.

Estudo cinético-químico não isotérmico e caracterização da combustão de um carvão CE4500