Why is there a difference in the NOx emissions of Indolene and Methanol fuels?

The difference in NOx emissions between Indolene and Methanol fuels primarily stems from their combustion characteristics. Indolene, a hydrocarbon-based fuel, tends to produce higher temperatures during combustion, which promotes the formation of nitrogen oxides (NOx). In contrast, Methanol has a higher oxygen content and burns at lower temperatures, resulting in reduced NOx emissions. Additionally, the chemical structure of Methanol leads to a more complete and efficient combustion process, further lowering NOx production.