The influence of fragmentation on the behavior of pyrite particles during pulverized coal combustion

Fragmentation was found to increase particle temperature and sulfur release rate compared with a no fragmentation case, speeding up the particle temperature increase towards its melting point. Increased oxygen content in the bulk environment decreases the time required for a particle to reach its melting point and for complete sulfur release due to increased oxidation reaction rates. Model results also indicate that small pyrite particles need less time to reach both decomposition and melting temperatures; suggesting that smaller particles will spend more time in a molten state and react more completely.