Int. J. Global Warming, Vol. 7, No. 4, 2015 487 Copyright © 2015 Inderscience Enterprises Ltd. Effect of nanoparticle additives on NO X emissions of diesel fuelled compression ignition engine Tayfun Ozgur*, Gökhan Tuccar, Erinç Uludamar, Ali Can Yilmaz, Ceyla Güngör, Mustafa Ozcanli, Hasan Serin and Kadir Aydin Department of Mechanical Engineering, Cukurova University, 01330, Adana, Turkey Email: tozgur@cu.edu.tr Email: gtuccar@cu.edu.tr Email: euludamar@cu.edu.tr Email: acyılmaz@cu.edu.tr Email: cgungor@cu.edu.tr Email: ozcanli@cu.edu.tr Email: hserin@cu.edu.tr Email: kdraydin@cu.edu.tr *Corresponding author Abstract: The amount of emitted harmful emission gases increases in parallel with increasing energy consumption. This increase has forced many countries to take various precautions and various restrictions on emitted emissions have been carried. In this study, effects of addition of oxygen containing nanoparticle additives on NO x emissions of diesel fuelled test engine were investigated. Nine different nanoparticle additives namely aluminium oxide (Al 2 O 3 ), magnesium oxide (MgO), titanium oxide (TiO 2 ), zinc oxide (ZnO), silicon oxide (SiO 2 ), iron oxide Fe 2 O 3 , nickel oxide (NiO), nickel iron oxide (NiFe 2 O 4 ) and nickel zinc iron oxide Zn 0.5 Ni 0.5 Fe 2 O 4 were added to diesel fuel at the dosages of 25, 50 and 100 ppm. As a result, optimum additive and addition dosages were determined. Finally, the results showed that NO x emissions were decreased with the addition of nanoparticles. Keywords: nanoparticle; nitrogen oxide; NO x ; emission; additive; diesel. Reference to this paper should be made as follows: Ozgur, T., Tuccar, G., Uludamar, E., Yilmaz, A.C., Güngör, C., Ozcanli, M., Serin, H. and Aydin, K. (2015) ‘Effect of nanoparticle additives on NO x emissions of diesel fuelled compression ignition engine’, Int. J. Global Warming, Vol. 7, No. 4, pp.487–498. Biographical notes: Tayfun Ozgur received his BSc degree in 2008 and MSc degree in 2011 in the Mechanical Engineering Department of Çukurova University, Adana, Turkey. He is currently a PhD student in the Mechanical Engineering Department. Gökhan Tuccar received his MSc degree in 2011 in the Mechanical Engineering Department of Çukurova University, Adana, Turkey. He is currently a PhD student in the Mechanical Engineering Department.