Influence of adding carbon nanotubes in diesel‐biodiesel blend on theperformance and emission in a CI engine

In this present work, the investigations are carried out to study the performance and emission of a 6 cylinderCompression Ignition (CI) engine using carbon nanotubes (CNT) as additive in diesel‐biodiesel blend. Multiwalledcarbon nanotubes Particles with the nano structure of chiral metal (1/3) and zigzag semiconductor(2/3) that has a length of (L = 10μn), the diameter of (D = 5nm) and 95% purity was used in this experiment.The dosing level of the carbon nanotube samples in the base fuel varied from 20 to 80 ppm. This blend fuel wasprepared by the sonication method in the proportion of 78% diesel, 20% biodiesel, and 2% surfactant byvolume. An ultrasonic vibrator was used for the uniform dispersion of the carbon nanotubes. The results indicatethat adding carbon nanotubes to diesel‐biodiesel fuel has a perceptible effect on engine performance, anddecreasing the specific fuel consumption as compared to base fuels. In addition to the performanceimprovement, significant reductions of CO & HC compared to base fuels and also a reduction of NOx than to thebiodiesel in the engine exhaust are observed.

Keywords:

emissions , engine , fuel , nanoparticles , additive