Authors : Luqman Muhammed Audu; Abdulrahaman Ismail Omoakhalen; Braimah Dirisu; Ibrahim Rasheed; Isah Adam Umar

Volume/Issue : Volume 11 - 2026, Issue 7 - July

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Google Scholar : https://tinyurl.com/2kv8nbph

Scribd : https://tinyurl.com/yeymdn66

DOI : https://doi.org/10.38124/ijisrt/26jul1055

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Abstract : The maritime industry's transition toward low-carbon propulsion has intensified interest in carbon-neutral fuels, particularly ammonia, because of its zero-carbon molecular structure and potential for renewable production. However, its application in marine compression-ignition engines is limited by high auto-ignition temperature, low flame speed, narrow flammability limits, and poor combustion reactivity, leading to prolonged ignition delay, combustion instability, and ammonia slip. This study presents a three-dimensional Computational Fluid Dynamics (CFD) investigation of the combustion, performance, and emission characteristics of methanol–ammonia dual-fuel blends in a medium-speed marine diesel engine using diesel pilot ignition.

Keywords : Marine Diesel Engine; Ammonia–Methanol Dual Fuel; Computational Fluid Dynamics (CFD); Combustion Characteristics; Brake Thermal Efficiency; Emissions; Marine Decarbonization.

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