The oxy-coal combustion is emerging as the most likely low-cost “clean coal” technology for both carbon capture and NOx and SOx emissions reduction. The use of CFD tools is crucial for cost-effective oxy-fuel technologies development and environmental concerns minimization. The coupling of detailed chemistry and CFD simulations is still prohibitive, especially for large-scale plants, because of the high computational effort required. So, the development of simple and reliable kinetic mechanisms is therefore necessary. This work presents a CFD study on coal pyrolysis, regarding implementation, validation and comparison of different devolatilization models, assessing their capacity to predict the total volatile yield, depending on heating rate, temperature and coal type.
ADAPTIVE KINETIC MODEL FOR COAL DEVOLATILIZATION IN OXY-COAL COMBUSTION CONDITIONS
Caposciutti, Gianluca;GALLETTI, CHIARA;TOGNOTTI, LEONARDO;
2015-01-01
Abstract
The oxy-coal combustion is emerging as the most likely low-cost “clean coal” technology for both carbon capture and NOx and SOx emissions reduction. The use of CFD tools is crucial for cost-effective oxy-fuel technologies development and environmental concerns minimization. The coupling of detailed chemistry and CFD simulations is still prohibitive, especially for large-scale plants, because of the high computational effort required. So, the development of simple and reliable kinetic mechanisms is therefore necessary. This work presents a CFD study on coal pyrolysis, regarding implementation, validation and comparison of different devolatilization models, assessing their capacity to predict the total volatile yield, depending on heating rate, temperature and coal type.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
