Rolls-Royce has now approved its mtu engines, including the Series 1163 and 8000, for operation with sustainable fuels such as Hydrotreated Vegetable Oil (HVO). This significant development allows these engines, available in both 16V and 20V cylinder configurations, to deliver power ranges from 4,800 to 10,000 kW while meeting stringent emission standards through the use of an advanced Selective Catalytic Reduction (SCR) system. The SCR technology ensures compliance with International Maritime Organization (IMO) Stage III emission limits, particularly in Emission Control Areas (ECA) like the Baltic Sea, the North Sea, and along the North American coast.
The key difference from earlier IMO II-compliant engines is the integration of the mtu exhaust gas aftertreatment system, centered around the SCR system. This system cuts nitrogen oxide emissions by 75% compared to IMO II standards. Its active control mechanism continuously monitors emissions before and after treatment, ensuring optimal performance and minimal consumption of reducing agents.
Rolls-Royce provides maximum flexibility in installation options, as the SCR system can be installed horizontally or vertically, allowing adaptation to various ship designs. Additionally, the system is shock-resistant for military applications, with an optional bypass feature that ensures continuous engine operation and propulsion power during high-shock conditions or extended low-load periods.
With the approval for use with HVO and other DIN EN15940 fuels, these engines can now run on sustainable alternatives to conventional diesel without requiring any modifications. This marks a critical step forward in reducing the maritime industry’s reliance on fossil fuels while maintaining operational efficiency and compliance with global emissions regulations.