Investigation of the effect of nano manganese dioxide addition to cottonseed oil biodiesel-diesel fuel blends and its usability in diesel engines

This study examines the production of biodiesel from cottonseed oil, focusing on its use in diesel engines. The biodiesel was produced through transesterification using sodium hydroxide as a catalyst and methanol as the alcohol, with different fuel blends created by mixing it with diesel fuel. Some blends also included nano manganese dioxide (MnO₂). The properties of the biodiesel, including kinematic viscosity, flammability point, and cetane number, showed improvements with MnO₂ addition, while low temperature filterability limit, pour point, and freezing point decreased. The calorific value was lower compared to diesel, and the addition of MnO₂ did not significantly impact it. SEM analysis revealed MnO₂ nanoparticles with enhanced catalytic properties, which may improve biodiesel performance and reduce emissions. Overall, the study highlights the potential of cottonseed oil biodiesel and the role of MnO₂ nanoparticles in enhancing fuel properties and engine performance.