A detailed model for combustion characteristics of petroleum residue and heat transfer coefficients in a CFB combustor

The authors developed a mathematical model for predicting the combustion characteristics of petroleum residue in a circulating fluidized bed at various conditions. It is a 1D unsteady state model that can be predicted the char conversion, output temperature, and heat transfer coefficients. Results showed that the heating rate plays a major role in the process; higher heating rate causes higher output temperature and heat transfer coefficient. It also found that the oxygen ratio has a positive influence on the char conversion and heat transfer coefficients. The model was validated against experimental data available in the literature and found to be in good agreements.