Internal combustion engines with application in automobiles and other relevant industries constitute significant environmental pollution via the release of toxic exhaust gasses like carbon monoxide (CO), hydrocarbons (HC), par ticulate matter (PM), and nitrogen oxide (NO x ). Engine researchers and manufacturers are challenged to develop external and internal measures to ensure environmentally friendly solutions to accommodate and conform to the growing list of emission standards. Therefore, this work presents an experimental investigation of the NO x emission profile of a diesel engine that is fuelled and fitted with waste frying oil-based biodiesel and catalytic converter. Using a single-cylinder, four-stroke air-cooled CI engine at a constant speed of 1900 rpm and different loadings of 25%, 50%, 75%, and 100%; fitted with a catalytic converter at the exhaust outlet of the engine and linked to a dynamometer and a gas analyser, an experiment was conducted at biodiesel/diesel volume blends of B0 (0/10), B5 (5/95), B20 (20/80), B30 (30/70), B70 (70/30), B10 0 (100/0); and 30% concentration (v/v), 0.5 litre/hr flow rate of aqueous urea from the catalytic converter. The results show an increasing NO x emission as the biodiesel component increased in the blend. The catalytic converter showed a downward NO x reduction with a significant 68% reduction in efficiency at high exhaust gas temperatures. It is concluded that the combined utilisation of waste frying oil-based biodiesel and the catalytic converter yields substantial NO x emission reduction.
U.S. Environmental Protection Agency (2002) Air Pollution Control Technology Fact Sheet—Selective Non-Catalytic Reduction. U.S. Environmental Protection Agency, Washington DC, 1-4. http://www.epa.gov/ttn/catc/dir1/cs4-2ch2.pdf
Clean Air Technology Center (1999) Nitrogen Oxides (NOX), Why and How They Are Controlled. Epa-456/F-99-006R, No. November, Clean Air Technology Center, Washington DC, 48.
Barabas, I. and Todoru, I.-A. (2012) Biodiesel Quality, Standards and Properties. In: Montero, G. and Stoytcheva, M., Eds., Biodiesel-Quality, Emissions and By-Products, IntechOpen, London. https://doi.org/10.5772/25370
Shahid, E.M. and Jamal, Y. (2011) Performance Evaluation of a Diesel Engine Using Biodiesel. Pakistan Journal of Engineering and Applied Sciences, 9, 68-75. http://journal.uet.edu.pk/ojs_old/index.php/pjeas/article/view/169
Murugesan, A., Umarani, C., Subramanian, R. and Nedunchezhian, N. (2009) Bio-Diesel as an Alternative Fuel for Diesel Engines—A Review. Renewable and Sustainable Energy Reviews, 13, 653-662. https://doi.org/10.1016/j.rser.2007.10.007
Fasogbon, S.K. and Asere, A.A. (2014) Effects of Soybean Methyl Ester on the Performance Characteristics of Compression Ignition Engine. International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, 8, 499-502. http://waset.org/Publication/9998417
Fasogbon, S.K. (2015) Melon Oil Methyl Ester: An Environmentally Friendly Fuel. Journal of Natural Resources and Development, 5, 47-53. https://doi.org/10.5027/jnrd.v5i0.06
Thangavelu, E. and Thamilkolundhu, S. (2011) Combustion and Emission Characteristics of a Diesel Engine Fuelled with Jatropha and Diesel Oil Blends. Thermal Science, 15, 1205-1214. https://doi.org/10.2298/TSCI100614109E
Vallinayagam, R., Vedharaj, S. and Yang, W.M. (2013) Emission Reduction from a Diesel Engine Fueled by Pine Oil Biofuel Using SCR and Catalytic Converter. Atmos. Environ, 80, 190-197. https://doi.org/10.1016/j.atmosenv.2013.07.069
Banerjee, N., Ramakrishnan, R. and Jash, T. (2014) Biodiesel Production from Used Vegetable Oil Collected from Shops Selling Fritters in Kolkata. Energy Procedia, 54, 161-165. https://doi.org/10.1016/j.egypro.2014.07.259
Al-Kofahi, A.J. (2017) Waste Cooking Oil to Biodiesel Fuel. https://www.academia.edu/28595601/Waste_Cooking_Oil_To_Biodiesel_Fuel
Shaban, S.A. (2012) Biodiesel Production from Waste Cooking Oil. Egyptian Journal of Chemistry, 55, 437-452. https://doi.org/10.21608/ejchem.2012.1167
Sanli, H. (2018) An Experimental Investigation on the Usage of Waste Frying Oil-Diesel Fuel Blends with Low Viscosity in a Common Rail DI-Diesel Engine. Fuel, 222, 434-443. https://doi.org/10.1016/j.fuel.2018.02.194
Guo, J., Peltier, E., Carter, R.E., Krejci, A.J., Stagg-Williams, S.M. and Depcik, C. (2012) Waste Cooking Oil Biodiesel Use in Two Off-Road Diesel Engines. ISRN Renew. Energy, 2012, Article ID: 130782. https://doi.org/10.5402/2012/130782
Utlu, Z. and Kocak, M.S. (2008) The Effect of Biodiesel Fuel Obtained from Waste Frying Oil on Direct Injection Diesel Engine Performance and Exhaust Emissions. Renewable Energy, 33, 1936-1941. https://doi.org/10.1016/j.renene.2007.10.006
Kocak, M.S., Ileri, E. and Utlu, Z. (2007) Experimental Study of Emission Parameters of Biodiesel Fuels Obtained from Canola, Hazelnut, and Waste Cooking Oils. Energy and Fuels, 21, 3622-3626. https://doi.org/10.1021/ef0600558
Dennis, L.Y. (2001) Development of a Clean Biodiesel Fuel in Hong Kong Using Recycled Oil. Water, Air, and Soil Pollution, 130, 277-282. https://doi.org/10.1023/A:1013883823851
Benjumea, P., Agudelo, J.R. and Agudelo, A.F. (2011) Effect of the Degree of Unsaturation of Biodiesel Fuels on Engine Performance, Combustion Characteristics, and Emissions. Energy and Fuels, 25, 77-85. https://doi.org/10.1021/ef101096x
Sala, R., Krasowski, J., Dzida, J. and Woodburn, J. (2018) Experiment of Selective Catalytic Reduction Retrofit for Euro 6 NOx Emission Level Compliance for Euro 5 Light Duty Vehicle. IOP Conference Series: Materials Science and Engineering, 421, Article ID: 042070. https://doi.org/10.1088/1757-899X/421/4/042070
Yang, L., Vicente, F., Alex, C., John, G. and Peter, M. (2015) NOx Control Technologies for Euro 6 Diesel Passenger Cars: Market Penetration and Experimental Performance Assessment (White Paper). Vol. 29, International Council on Clean Transportation, Berlin.
Sinzenich, H. (2014, May 29) How Does Selective Catalytic Reduction Work? https://www.mtu-solutions.com/eu/en/stories/technology/research-development/how-does-selective-catalytic-reduction-work.html
Krocher, O. (2018) Selective Catalytic Reduction of NOX. Catalysts, 8, Article No. 459. https://doi.org/10.3390/catal8100459
Rafal, M.S. and Piotr, B. and Brzezanski, M. (2017) Concept of Vaporized Urea Dosing in Selective Catalytic Reduction. Catalysts, 7, Article No. 307. https://doi.org/10.3390/catal7100307
Schill, L. and Fehrmann, R. (2018) Strategies of Coping with Deactivation of NH3-SCR Catalysts Due to Biomass Firing. Catalysts, 8, Article No. 135. https://doi.org/10.3390/catal8040135
Senthilkumar, S., Madhankumar, P.M. and Shanmugam, N. (2014) Experimental Investigation of Urea-Scr IN C.I. Engine Fuelled with Diesel and Jatropha Blends. International Journal of Innovative Research in Science, Engineering and Technology, 3, 11387-11396. https://www.researchgate.net/publication/268278003
Praveen, R. and Natarajan, S. (2014) Experimental Study of Selective Catalytic Reduction System on CI Engine Fuelled with Diesel-Ethanol Blend for NOX Reduction with Injection of Urea Solutions. International Journal of Engineering and Technology, 6, 895-904.
Praveena, V., Martin, M.L.J. and Geo, V.E. (2022) Combined Effects of Various Strategies to Curtail Exhaust Emissions in a Biomass Waste Fueled CI Engine Coupled with SCR System. Engineering Science and Technology, an International Journal, 33, Article ID: 101085. https://doi.org/10.1016/j.jestch.2021.101085
Shi, X., Yu, Y., He, H., Shuai, S., Dong, H. and Li, R. (2008) Combination of Biodiesel-Ethanol-Diesel Fuel Blend and SCR Catalyst Assembly to Reduce Emissions from a Heavy-Duty Diesel Engine. Journal of Environmental Sciences, 20, 177-182. https://doi.org/10.1016/S1001-0742(08)60028-5
Yusuf, A.A., Abdu Yusuf, D., Yusuf Bello, T., Tambaya, M., Abdullahi, B., Ali Muhammed-Dabo, I., et al. (2022) Influence of Waste Oil-Biodiesel on Toxic Pollutants from Marine Engine Coupled with Emission Reduction Measures at Various Loads. Atmospheric Pollution Research, 13, Article ID: 101258. https://doi.org/10.1016/j.apr.2021.101258
Kumar, S., Sushma, U., Chandrasagar, L., Raju, V. and Devi, V. (2017) Use of Waste Frying Oil as C.I. Engine Fuel—A Review. Open Access Library Journal, 4, Article No. e3958. https://doi.org/10.4236/oalib.1103958
Tziourtzioumis, D.N. and Stamatelos, A.M. (2017) Experimental Investigation of the Effect of Biodiesel Blends on a DI Diesel Engine’s Injection and Combustion. Energies, 10, Article No. 970. https://doi.org/10.3390/en10070970
Tan, P.Q., Zhang, S.C., Wang, S.Y., Hu, Z.Y. and Lou, D.M. (2020) Simulation on Catalytic Performance of Fresh and Aged SCR Catalysts for Diesel Engines. Journal of the Energy Institute, 93, 2280-2292. https://doi.org/10.1016/j.joei.2020.06.011
Bhaskarrao, P.A. and Shinde, R.M. (2015) Development of Catalytic Converter for Emission. International Journal of Mechanical and Production Engineering Research and Development, 1, 87-92. http://troindia.in/journal/ijapme/vol1iss4/87-91.pdf
Kumar, K.S., Balaji, G., Teja, P. and Rahul Kumar, S. (2021) Experimental Investigation on Reducing Agents for Catalytic Converters of CI Engine. Journal of Physics: Conference Series, 2054, Article ID: 012029. https://doi.org/10.1088/1742-6596/2054/1/012029