Experimental Investigation of Performance, Emission and Combustion Characteristics of a Di-diesel Engine Fuelled with Aqueous Cerium Oxide and Aqueous Aluminium Oxide Nanoparticle Additives P. Ravichandra Ganesh, K. Hemachandra Reddy, J. M. Babu, and M. Sarath Chandra Abstract Experiments were conducted to determine the engine performance and emission characteristics of Direct Injection (DI)—diesel engine using aqueous cerium oxide nanoparticles (ACONP) and aqueous aluminium oxide nanoparticles (AAONP) as an additive in diesel, ethanol and surfactant blended fuel and were compared with diesel fuel. Blends were prepared by in proportions of Diesel 83%, Ethanol 15% and Surfactant 2% (Span 80) with 50 and 75 ppm aqueous cerium oxide and aqueous aluminium oxide nanoparticles as an additive, denoted as ACONP50, ACONP75, AAONP50 and AAONP75, respectively. The blends are prepared by uniform mixing of nanoparticles with the help of an ultrasonicator. Nanoparticles were acted as an oxygen-donating catalyst which improves the combustion process and results in complete combustion. This will also reduce the hydrocarbons (HC) and carbon monoxide (CO) emissions. It was observed that there is a significant enhancement of performances and decrease of exhaust emissions HC, CO, smoke, P. Ravichandra Ganesh (B ) Department of Mechanical Engineering, Dr. M. G. R. Educational and Research Institute, University, Chennai, Tamil Nadu 600095, India e-mail: prcganesh@gmail.com K. Hemachandra Reddy Andhra Pradesh State Council of Higher Education, Mangalagiri, Andrapradesh, India e-mail: konireddy@gmail.com J. M. Babu Department of Mechanical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu 600062, India e-mail: jmbabu@veltech.edu.in M. Sarath Chandra Department of Mechanical Engineering, Guru Nanak Institutions Technical Campus, Ibrahimpatnam, Hyderabad, Telangana, India © Springer Nature Singapore Pte Ltd. 2021 G. S. V. L. Narasimham et al. (eds.), Recent Trends in Mechanical Engineering, Lecture Notes in Mechanical Engineering, https://doi.org/10.1007/978-981-15-7557-0_8 85