Study on Mechanisms of NOx and SOx Formation in a Marine Diesel Engine Based on Quantum Chemistry

Abstract

This paper presents the study on mechanisms of NO_x and SO_x formation in a marine diesel engine and models about NO_x and SO_x formation were set up based on theory of quantum chemistry. The new NO_x model covers thermal NO, prompt NO, fuel NO and NO via N₂O, etc. SO_x formation model discovers the detailed composition changes of sulphur-contained materials during combustion process. The correction and availability of the models were proved by engine emission tests. In the last, simulations of NO_x and SO_x formation in a marine diesel engine were carried out and by that the laws of engine parameters on engine emissions were obtained. The models suggested in present work can do help to reduce engine emissions.