A steady state model of the Refuse Derived Fuel (RDF) incinerator at Hartford, Connecticut was developed. The model was based on data from the National Incinerator Testing and Evaluation Program (NITEP) conducted by Environment Canada. The model was developed using a steady state simulation package, AspenPlus, incorporating a non-ideal Gibbs free energy minimisation approach to predict the CO, NO_x, SO₂, HCl, polychlorinated dibenzo-p dioxins (PCDD) and furan (PCDF) emissions. Statistical correlations were also used to predict critical parameters such as furnace temperature, particulate matter, and the higher heating value of RDF. This model can be used to predict emissions for the design of air pollution control equipment as well as energy production for a given flow and composition of fuel.