Develop a model of a coal combustor fed with Illinois No. 6 coal, a bituminous coal, at 2 atm pressure. The atmospheric air for combustion is available at a temperature of 150°C. The flow of combustion air is 10% more than the stoichiometric requirement. The coal is also available at 150°C. The composition for Illinois No. 6 coal is

The combustor is adiabatic. Assume the carbon conversion to be 100%. The high heating value (HHV) of the coal is reported to be 27,113 kJ/kg. Compare the heating value estimated by the process simulator with this reported value. As mentioned before, most of the models for heterogeneous solids are empirical. Modify the parameters of the enthalpy model to match the reported heating value. What is the composition at the outlet of the combustor?

Transcribed Image Text:

Proximate Analysis (wt%) Moisture Ash Volatile Matter Fixed Carbon 11.12 9.70 34.99 44.19