A CFD-assisted investigation into the mechanism behind the surge in NO2 emissions from methanol/diesel dual fuel engines

In the pursuit of carbon neutrality, the adoption of methanol as a transportation fuel presents a viable strategy for decarbonization. Methanol/diesel dual fuel operation, notable for its reduction in the overall carbon content of the fuel mix, presents a compelling method to mitigate carbon-based emissions. Notably, this mode of combustion has been observed to exhibit an unusual phenomenon where the NO 2 /NOx ratio surpasses 50%, diverging from the typical ratio of below 20% observed in diesel engines. This study aims to elucidate the underlying mechanism responsible for the elevated NO 2 concentration in methanol/diesel dual fuel engines, a topic that remains inadequately understood in existing literature.…