| NOx emissions from automotive engines a major concern, especially from lean burn engines fuelled by diesel or natural gas. These engines are more fuel efficient than gasoline engines, however, catalytic NOx removal from these engines is difficult because of the high oxygen content.; This work describes the development of kinetic models for the description of SCR using propene as a reductant. The models proposed are based on literature models for oxidation of CO and hydrocarbons, and the reduction of NO x. A single channel monolith reactor model is coupled to a general pattern search optimizer to validate the proposed models using experimental data. A reasonable fit was obtained for the proposed models.; An experimental program was performed to evaluate the emission characteristics of a single cylinder compressed natural gas engine, and the efficiency of a NOx absorber catalyst placed in the exhaust. Hydrogen was used to regenerate the catalyst. |
