The scarcity of conventional fuel and stringent emission norms made researchers to look after alternative fuels to run an internal combustion engine. One of the possible alternatives for the Compression Ignition engine is biodiesel. Although there are some challenges such as high viscosity, low calorific value, carbon deposit on the injector nozzle, etc. To overcome these challenge nanoparticles are added which will bring most properties near to virgin diesel. Simarouba a non-edible biodiesel feedstock used and aluminum oxide nanoparticles are added with 50 nm size. Using a probe-type Ultrasonication process nano-biodiesel blend is prepared. To improve stability SDS surfactants are added. The characterization of nanoparticles studied using SEM image. The performance of the engine tested for different dosage levels of nanoparticles mainly 25 ppm, 50 ppm, and 75 ppm. The injection timing, injector pressure, and speed kept constant, whereas injection pressure is varied 200 bar, 225 bar, and 250 bar. There is found a 5.2% increase in brake thermal efficiency for nanoparticles added blend biodiesel at 250 bar compare to 200 bar pressure. For the same thing brake specific fuel consumption decreased by 9%. Most of emissions such as Carbon monoxide, unburnt hydrocarbons decreased, whereas there is a significant amount of increase in oxides of nitrogen emission found.

The current study reports outcome of aluminium oxide nanoparticles blend biodiesel fuel on the performance and emission distinctiveness of a compression ignition engine. The biodiesel is formed from Simarouba oil by transesterification method and blended with 50ppm Aluminium oxide nanoparticles. The entire analysis is carried out in invariable speed CI engines with four phase's pure diesel, diesel+50pppm Aluminium oxide nanoparticles, blended biodiesel (S20) and S20+50pppm Aluminium oxide nanoparticles. The outcome revealed a significant improvement in brake thermal efficiency and reduction in brake specific fuel consumption, carbon monoxide (CO), unburnt Hydrocarbons (UHC). But there is also small percentage increase in oxides of nitrogen emissions.