Nitric oxide emissions from a coal-fueled engine: Numerical results
A cycle simulation for coal-fueled, reciprocating, internal-combustion engines has been expanded to include calculations of nitric oxide exhaust emissions. Calculations have been completed for a diesel oil and a coal-water slurry fuel. The fuels were assumed to be direct injected and compression ignited. The numerical simulation was based on a thermodynamic analysis with models for the injection, ignition, mixing, combustion, and heat transfer. The calculations of the nitric oxide formation and reduction reactions were based on the Zel'dovich mechanism. The engine performance parameters were in good agreement with published values in the literature. The computed exhaust nitric oxide concentrations for both the diesel and coal-water slurry fuels were in fair agreement with recent preliminary experimental values from the literature. In general, the exhaust nitric oxide concentrations were lower for the coal-water slurry fuel relative to the diesel fuel. The thermal nitric oxide production for the coal-water slurry fuel was a strong function of the coal/water mass ratio for the conditions examined.
author list (cited authors)
Caton, J. A., Schmidt, J., Roth, J., Bachman, F., & Annamalai, K.