Technical-economic assessment of selective catalytic reduction technology in emission control for marine diesel engines


Van Viet Pham†,*, Tri Hieu Le†, Van Tam Bui‡,*


† Institute of Maritime, Ho Chi Minh City University of Transport, Ho Chi Minh city, Vietnam
‡Institute of Engineering, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh

Corresponding Author Email: viet.pham@ut.edu.vn; bv.tam@hutech.edu.vn

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Marine diesel engines using fuels of low quality, high sulfur content, combustion process in the combustion chamber produce various combustion products, in which SOx and NOx account for a significant proportion. In order to meet the strict IMO regulations on SOx and NOx emissions adopted in 2020. Primary and secondary solutions have been deployed on the fleets. The primary solution comes from the conversion of alternative fuels or changes to the engine structure, so it requires large costs and encounters legal barriers. Secondary solutions have been focused on the installation of exhaust absorbers on the exhaust manifold. Prominent among exhaust gas absorption technologies is Selective Catalytic Reduction (SCR). The SCR system treats engine exhaust pollution by injecting a catalyst directly into the exhaust manifold of an internal combustion engine. The SCR system can handle 90% of NOx. Therefore, research and application of SCR technology for marine diesel engines can significantly reduce environmental pollution and greenhouse gas emissions. This article has focused on technical and economic evaluations of the SCR system to highlight its role in IMO’s strategy to reduce emissions from ships. This study also clarifies the very promising application of SCR on global shipping fleets in the short and medium term.