PERFORMANCE EVALUATION OF SCR (SELECTIVE CATALYTIC REDUCTION) SYSTEM REDUCING EMISSIONS IN SHIP MAIN ENGINES
DOI:
https://doi.org/10.30649/ijmea.v2i2.385Keywords:
Emission reduction, catalyst temperature, marine diesel engine, SCR system, urea injectionAbstract
The increase in global shipping activities has led to higher emissions of nitrogen oxides (NOₓ) from ship main engines, contributing significantly to air pollution and environmental degradation. This study aims to evaluate the performance of the SCR system in reducing NOₓ emissions from a ship’s main diesel engine under various load conditions. The research employed an experimental method with quantitative analysis. Data were collected through direct measurements on a medium-speed marine diesel engine equipped with an SCR unit using urea as a reductant. Additionally, the installation of the SCR system did not significantly affect engine power output or specific fuel oil consumption (SFOC). In conclusion, the SCR system is a reliable and efficient emission control technology for marine engines to comply with IMO MARPOL Annex VI Tier III standards. Optimizing the urea injection control system is recommended to enhance long-term performance and reduce operational costs.
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Y. Zhu, W. Zhou, C. Xia, and Q. Hou, “Application and development of selective catalytic reduction technology for marine low-speed diesel engine: trade-off among high sulfur fuel, high thermal efficiency, and low pollution emission,” Atmosphere, vol. 13, no. 5, p. 731, 2022.
K. Bayramoğlu and G. Özmen, “Design and performance evaluation of low-speed marine diesel engine selective catalytic reduction system,” Process Safety and Environmental Protection, vol. 155, pp. 184–196, 2021.
C. Lee, “Performance evaluation of a urea-selective catalytic reduction system in a marine diesel engine,” Proc. Inst. Mech. Eng., Part M: J. Eng. for the Maritime Environment, vol. 231, no. 3, pp. 801–808, 2017.
Y. Zhu, R. Zhang, S. Zhou, C. Huang, Y. Feng, M. Shreka, and C. Zhang, “Performance optimization of high-pressure SCR system in a marine diesel. Part II: catalytic reduction and process,” Topics in Catalysis, vol. 62, no. 1, pp. 40–48, 2019.
H. S. Kim, S. Kasipandi, J. Kim, S. H. Kang, J. H. Kim, J. H. Ryu, and J. W. Bae, “Current catalyst technology of selective catalytic reduction (SCR) for NOx removal in South Korea,” Catalysts, vol. 10, no. 1, p. 52, 2020.
Z. Mera, C. Matzer, S. Hausberger, and N. Fonseca, “Performance of selective catalytic reduction (SCR) system in a diesel passenger car under real-world conditions,” Applied Thermal Engineering, vol. 181, p. 115983, 2020.
P. Napolitano, L. F. Liotta, C. Guido, C. Tornatore, G. Pantaleo, V. La Parola, and C. Beatrice, “Insights of selective catalytic reduction technology for nitrogen oxides control in marine engine applications,” Catalysts, vol. 12, no. 10, p. 1191, 2022.
A. N. Shah, Y. S. Ge, L. Jiang, and Z. H. Liu, “Performance evaluation of a urea-water selective catalytic reduction (SCR) for controlling the exhaust emissions from a diesel engine,” Turkish Journal of Engineering & Environmental Sciences, vol. 33, no. 4, 2009.
D. Lu, G. Theotokatos, J. Zhang, Y. Tang, H. Gan, Q. Liu, and T. Ren, “Numerical investigation of the high pressure selective catalytic reduction system impact on marine two-stroke diesel engines,” Int. J. Naval Architecture and Ocean Engineering, vol. 13, pp. 659–673, 2021.
Y. Zhang, C. Xia, D. Liu, Y. Zhu, and Y. Feng, “Experimental investigation of the high-pressure SCR reactor impact on a marine two-stroke diesel engine,” Fuel, vol. 335, p. 127064, 2023.
Y. Zhu, C. Xia, M. Shreka, Z. Wang, L. Yuan, S. Zhou, and S. A. Ahmed, “Combustion and emission characteristics for a marine low-speed diesel engine with high-pressure SCR system,” Environmental Science and Pollution Research, vol. 27, no. 12, pp. 12851–12865, 2020.
S. C. Hwang and H. Nam, “Analysis of retrofit SCR system for small-sized ship diesel engines using numerical methods,” Korean Journal of Chemical Engineering, vol. 41, no. 8, pp. 2351–2360, 2024.
A. G. Konstandopoulos, D. Zarvalis, L. Chasapidis, D. Deloglou, N. Vlachos, A. Kotrba, and G. Anderson, “Investigation of SCR catalysts for marine diesel applications,” SAE Int. J. Engines, vol. 10, no. 4, pp. 1653–1666, 2017.
S. Ji, W. Jung, and J. Lee, “Techno-economic evaluation of direct low-pressure selective catalytic reduction for boil-off gas treatment systems of NH3-fueled ships,” J. Marine Science and Engineering, vol. 12, no. 5, p. 698, 2024.
M. I. Foteinos, S. K. Konstantinidis, N. P. Kyrtatos, and K. V. Busk, “Simulation of the transient thermal response of a high pressure selective catalytic reduction aftertreatment system for a Tier III two-stroke marine diesel engine,” J. Eng. for Gas Turbines and Power, vol. 141, no. 7, p. 071001, 2019.
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