TY  - JOUR
T1  - Comparative Study on The Effect of Oxygen-Enriched Air on Combustion of a Spark Ignition Engine Fuelled with Methanol and Ethanol
AU  - ., Nıdhı
PY  - 2025
DA  - December
Y2  - 2025
DO  - 10.5541/ijot.1684430
JF  - International Journal of Thermodynamics
PB  - Uluslararası Uygulamalı Termodinamik Derneği İktisadi İşletmesi
WT  - DergiPark
SN  - 1301-9724
SP  - 296
EP  - 307
VL  - 28
IS  - 4
LA  - en
AB  - An experimental investigation was carried out on a single-cylinder four-stroke spark-ignition engine fuelled fuelled with methanol (M100) and ethanol (E100) to study the effect of oxygen enrichment on combustion characteristics of the engine. The experiments were carried out at base compression ratio 9.8 and the results were compared at higher compression ratio 10.6. The compression ratio was increased by decreasing the clearance volume from the cylinder head. The engine was operated at the maximum torque (4.5 Nm at 3600 rpm) achieved with M100 fuel and the results were compared for both the fuels at the same torque. The results indicate that with oxygen enrichment at the increased compression ratio, in-cylinder peak pressure increased significantly by 34.7% with M100 and 8.4% with E100 compared to base gasoline. The rate of pressure rise increased by 2.7 times with M100 and by 20% with E100. Due to high peak pressure, heat release rate, and rate of pressure rise, the combustion duration decreased significantly with both fuels.  The cycle-to-cycle variation in indicated mean effective pressure decreased to 1.48% with E100 and M100. A notable outcome of the study was that the effect of oxygen enrichment was more prominent in methanol combustion than with ethanol at both compression ratios with greater effect at higher CR.
KW  - Methanol
KW  - ethanol
KW  - combustion
KW  - IC engine
KW  - oxygen-enriched air
CR  - E. Lindstad, T. Ø. Ask, P. Cariou, G. S. Eskeland and A. Rialland, “Wide use of renewable energy in transport,” Transportation Research Part D: Transport and Environment, vol. 119, June 2023, Art. no. 103713, doi: 10.1016/j.trd.2023.103713.
CR  - S. Shafiee and E. Topal, “When will fossil fuel reserves be diminished?,” Energy Policy, vol. 37, no. 1, pp. 181–189, Jan. 2009, doi: 10.1016/j.enpol.2008.08.016.
CR  - Z. Tian, X. Zhen, Y. Wang, D. Liu, and X. Li, “Comparative study on combustion and emission characteristics of methanol, ethanol and butanol fuel in TISI engine,” Fuel, vol. 259, Jan. 2020, Art. no. 116199, doi: 10.1016/j.fuel.2019.116199.
CR  - A. M. Pourkhesalian, A. H. Shamekhi, and F. Salimi, “Alternative fuel and gasoline in an SI engine: A comparative study of performance and emissions characteristics,” Fuel, vol. 89, no. 5, pp. 1056–1063, May 2010, doi: 10.1016/j.fuel.2009.11.025.
CR  - Y. Li, X.-S. Bai, M. Tunér, H. G. Im, and B. Johansson, “Investigation on a high-stratified direct injection spark ignition (DISI) engine fueled with methanol under a high compression ratio,” Applied Thermal Engineering, vol. 148, pp. 352–362, Feb. 2019, doi: 10.1016/j.applthermaleng.2018.11.065.
CR  - X. Li, X. Zhen, Y. Wang, and Z. Tian, “Numerical comparative study on performance and emissions characteristics fueled with methanol, ethanol and methane in high compression spark ignition engine,” Energy, vol. 254, Sept. 2022, Art. no. 124374, doi: 10.1016/j.energy.2022.124374.
CR  - X. Li, X. Zhen, S. Xu, Y. Wang, D. Liu, and Z. Tian, “Numerical comparative study on knocking combustion of high compression ratio spark ignition engine fueled with methanol, ethanol and methane based on detailed chemical kinetics,” Fuel, vol. 306, Dec. 2021, Art. no. 121615, doi: 10.1016/j.fuel.2021.121615.
CR  - Q. Duan, X. Yin, X. Wang, H. Kou, and K. Zeng, “Experimental study of knock combustion and direct injection on knock suppression in a high compression ratio methanol engine,” Fuel, vol. 311, Mar. 2022, Art. no. 122505, doi: 10.1016/j.fuel.2021.122505.
CR  - T. G. Leone et al., “The Effect of Compression Ratio, Fuel Octane Rating, and Ethanol Content on Spark-Ignition Engine Efficiency,” Environ. Sci. Technol., vol. 49, no. 18, pp. 10778–10789, Sept. 2015, doi: 10.1021/acs.est.5b01420.
CR  - O. I. Awad, R. Mamat, M. M. Noor, T. K. Ibrahim, I. M. Yusri, and A. F. Yusop, “The impacts of compression ratio on the performance and emissions of ice powered by oxygenated fuels: A review,” Journal of the Energy Institute, vol. 91, no. 1, pp. 19–32, Feb. 2018, doi: 10.1016/j.joei.2016.09.003.
CR  - P. Sakthivel, K. A. Subramanian, and R. Mathai, “Effects of different compression ratios and spark timings on performance and emissions of a two-wheeler with 30% ethanol-gasoline blend (E30),” Fuel, vol. 277, May 2020, Art. no. 118113 doi: 10.1016/j.fuel.2020.118113.
CR  - M. K. Balki and C. Sayin, “The effect of compression ratio on the performance, emissions and combustion of an SI (spark ignition) engine fueled with pure ethanol, methanol and unleaded gasoline,” Energy, vol. 71, pp. 194–201, July 2014, doi: 10.1016/j.energy.2014.04.074.
CR  - B. S. Nuthan Prasad, J. K. Pandey, and G. N. Kumar, “Impact of changing compression ratio on engine characteristics of an SI engine fueled with equi-volume blend of methanol and gasoline,” Energy, vol. 191, Jan. 2020, Art. no. 116605, doi: 10.1016/j.energy.2019.116605.
CR  - C. Wouters, P. Burkardt, and S. Pischinger, “Limits of compression ratio in spark-ignition combustion with methanol,” International Journal of Engine Research, vol. 23, no. 5, pp. 793–803, May 2022, doi: 10.1177/14680874211043390.
CR  - C. Gong, F. Liu, J. Sun, and K. Wang, “Effect of compression ratio on performance and emissions of a stratified-charge DISI (direct injection spark ignition) methanol engine,” Energy, vol. 96, pp. 166–175, Feb. 2016, doi: 10.1016/j.energy.2015.12.062.
CR  - M. B. Çelik, B. Özdalyan, and F. Alkan, “The use of pure methanol as fuel at high compression ratio in a single cylinder gasoline engine,” Fuel, vol. 90, no. 4, pp. 1591–1598, Apr. 2011, doi: 10.1016/j.fuel.2010.10.035.
CR  - Y. Zhou et al., “Potential of compression ratio and exhaust gas dilution on improving combustion and nitrogen oxides emission performance on a PFI engine fueled with methanol,” Fuel, vol. 323, Sept. 2022, Art. no. 124197, doi: 10.1016/j.fuel.2022.124197.
CR  - L. Li, D. Qiu, and Z. Liu, “The Characteristic of Transient HC Emissions of the First Firing Cycle During Cold Start on an LPG SI Engine,” Toronto, Canada, Oct. 2006, doi: 10.4271/2006-01-3403.
CR  - J. A. Caton, “The Effects of Oxygen Enrichment of Combustion Air for Spark-Ignition Engines Using a Thermodynamic Cycle Simulation,” in ASME 2005 Internal Combustion Engine Division Spring Technical Conference, Chicago, Illinois, USA: ASMEDC, pp. 135–147, Jan. 2005, doi: 10.1115/ICES2005-1006.
CR  - P. Seers, F. Foucher, and C. Mounaïm-Rousselle, “Influence of O2 -enriched intake air with CO2 dilution on the combustion process of an optically accessible spark-ignition engine,” International Journal of Engine Research, vol. 14, no. 1, pp. 34–44, Feb. 2013, doi: 10.1177/1468087412442122.
CR  - Nidhi and K. A. Subramanian, “Experimental investigation on effects of oxygen enriched air on performance, combustion and emission characteristics of a methanol fuelled spark ignition engine,” Applied Thermal Engineering, vol. 147, pp. 501–508, Jan. 2019, doi: 10.1016/j.applthermaleng.2018.10.066.
CR  - J. Jeevahan, A. Poovannan, V. Sriram, R. B. Durai Raj, G. Maghwaran, and G. Britto Joseph, “Effect of intake air oxygen enrichment for improving engine performance and emissions control in diesel engine,” International Journal of Ambient Energy, vol. 40, no. 1, pp. 96–100, Jan. 2019, doi: 10.1080/01430750.2017.1372811.
CR  - T. T. Maxwell, V. Setty, J. C. Jones, and R. Narayan, “The Effect of Oxygen Enriched Air on the Performance and Emissions of an Internal Combustion Engines,” Philadelphia, Pennsylvania, United States, Oct. 1993, Art. no. 932804. doi: 10.4271/932804.
CR  - A. A. Quader, “Exhaust Emissions and Performance of a Spark Ignition Engine Using Oxygen Enriched Intake Air,” Combustion Science and Technology, vol. 19, no. 1–2, pp. 81–86, Nov. 1978, doi: 10.1080/00102207808946869.
CR  - S. Kajitani, N. Sawa, T. McComiskey, and K. T. Rhee, “A Spark Ignition Engine Operated by Oxygen Enriched Air,” San Francisco, California, United States, Oct. 1992, Art. no. 922174. doi: 10.4271/922174.
CR  - R. B. Poola, H. K. Ng, R. R. Sekar, J. H. Baudino, and C. P. Colucci, “Utilizing Intake-Air Oxygen-Enrichment Technology to Reduce Cold-Phase Emissions,” Toronto, Canada, Oct. 1995, Art. no. 952420. doi: 10.4271/952420.
CR  - J. Heywood, Internal Combustion Engine Fundamentals 2E, 2nd edition. New York, N.Y: McGraw-Hill Education, 2019.
CR  - S. Verhelst, J. W. Turner, L. Sileghem, and J. Vancoillie, “Methanol as a fuel for internal combustion engines,” Progress in Energy and Combustion Science, vol. 70, pp. 43–88, Jan. 2019, doi: 10.1016/j.pecs.2018.10.001.
CR  - H. Köten, Y. Karagöz, and Ö. Balcı, “Effect of different levels of ethanol addition on performance, emission, and combustion characteristics of a gasoline engine,” Advances in Mechanical Engineering, vol. 12, no. 7, July 2020, Art. no. 1687814020943356, doi: 10.1177/1687814020943356.
CR  - X. Li, X. Zhen, Y. Wang, and Z. Tian, “Numerical comparative study on performance and emissions characteristics fueled with methanol, ethanol and methane in high compression spark ignition engine,” Energy, vol. 254, Sept. 2022, Art. no. 124374, doi: 10.1016/j.energy.2022.124374.
CR  - V. Ya. Basevich, S. M. Kogarko, and G. A. Furman, “The reaction of methanol with atomic oxygen,” Russ Chem Bull, vol. 24, no. 5, pp. 948–952, May 1975, doi: 10.1007/BF00922939.
CR  - P. Geng, H. Zhang, and S. Yang, “Experimental investigation on the combustion and particulate matter (PM) emissions from a port-fuel injection (PFI) gasoline engine fueled with methanol–ultralow sulfur gasoline blends,” Fuel, vol. 145, pp. 221–227, Apr. 2015, doi: 10.1016/j.fuel.2014.12.067.
CR  - X. Cai, J. Wang, W. Zhang, Y. Xie, M. Zhang, and Z. Huang, “Effects of oxygen enrichment on laminar burning velocities and Markstein lengths of CH4/O2/N2 flames at elevated pressures,” Fuel, vol. 184, pp. 466–473, Nov. 2016, doi: 10.1016/j.fuel.2016.07.011.
CR  - S. M. Sarathy, P. Oßwald, N. Hansen, and K. Kohse-Höinghaus, “Alcohol combustion chemistry,” Progress in Energy and Combustion Science, vol. 44, pp. 40–102, Oct. 2014, doi: 10.1016/j.pecs.2014.04.003.
CR  - X. Zhang, Y. Duan, R. Zhang, H. Wei, and L. Chen, “Optical study of oxygen enrichment on methane combustion characteristics under high compression-ratio conditions,” Fuel, vol. 328, Nov. 2022, Art. no. 125251, doi: 10.1016/j.fuel.2022.125251.
CR  - D. N. Assanis, R. B. Poola, R. Sekar, and G. R. Cataldi, “Study of Using Oxygen-Enriched Combustion Air for Locomotive Diesel Engines,” Journal of Engineering for Gas Turbines and Power, vol. 123, no. 1, pp. 157–166, Jan. 2001, doi: 10.1115/1.1290590.
CR  - X. Li et al., “Exploring the effects of compression ratio and initial flame kernel radius on combustion characteristics and fuel economy of a dual-fuel spark ignition engine under oxy-fuel combustion mode,” Fuel, vol. 385, Apr. 2025, Art. no. 134098, doi: 10.1016/j.fuel.2024.134098.
CR  - J. Skřínský, “Measurement and Calculation of Explosion Pressure for Hydroxyl Substituted Hydrocarbons Mixture,” MATEC Web Conf., vol. 168, p. 06006, 2018, doi: 10.1051/matecconf/201816806006.
CR  - Z. H. Huang et al., “Combustion characteristics and heat release analysis of a compression ignition engine operating on a diesel/methanol blend,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol. 218, no. 9, pp. 1011–1024, Sept. 2004, doi: 10.1243/0954407041856818.
CR  - Z. Chen, J. Deng, H. Zhen, C. Wang, and L. Wang, “Experimental Investigation of Hydrous Ethanol Gasoline on Engine Noise, Cyclic Variations and Combustion Characteristics,” Energies, vol. 15, no. 5, p. 1760, Feb. 2022, doi: 10.3390/en15051760.
CR  - M. Ghaderi Masouleh, K. Keskinen, O. Kaario, H. Kahila, S. Karimkashi, and V. Vuorinen, “Modeling cycle-to-cycle variations in spark ignited combustion engines by scale-resolving simulations for different engine speeds,” Applied Energy, vol. 250, pp. 801–820, Sept. 2019, doi: 10.1016/j.apenergy.2019.03.198.
CR  - J. Zheng, Z. Huang, J. Wang, B. Wang, D. Ning, and Y. Zhang, “Effect of compression ratio on Cycle-by-Cycle variations in a natural gas direct injection engine,” Energy & Fuels, vol. 23, no. 11, pp. 5357–5366, Nov. 2009, doi: 10.1021/ef900651p.
UR  - https://doi.org/10.5541/ijot.1684430
L1  - https://dergipark.org.tr/en/download/article-file/4808933
ER  -