The 230-metre vessels were commissioned in 2022 and 2023 respectively. Each is powered by 2 × 8L51/60DF + 2 × 6L51/60DF engines and operates in the Baltic Sea between Germany, Sweden, Poland and Lithuania.

TT-Line and Everllence discussed using bio-LNG as a substitute for fossil LNG, strengthening their long-term technical cooperation. This collaboration also included continuous emissions measurements on board the NILS HOLGERSSON for nearly a year to optimise operations.

These revealed:

• no significant ageing effect on the engines related to methane emissions;
• emission values from the test bed could be reproduced on board;
• no negative impacts on engine operating parameters during bio-LNG use.

Andreas Schaerli, COO of TT-Line, said: “By using climate-neutral bio-LNG derived from waste materials, TT-Line is making a decisive contribution to climate protection in the Baltic Sea. Thanks to this technology, our Green Ships – the NILS HOLGERSSON and PETER PAN – enable a CO2-free journey across the entire fleet. Our customers can already fully compensate for their crossing by adding bio-LNG during booking. We are thus consistently pursuing innovative solutions to sustainably reduce emissions and shape a climate-friendly future for ferry transport.

”The bio-LNG is sourced from agricultural waste in northern Europe: biogas is fed into the grid, then extracted, liquefied and loaded onto a bunker vessel for delivery to TT-Line ships. Replacing one tonne of fossil LNG with bio-LNG saves 2.75 tonnes of CO2 emissions – equivalent to a 100% reduction.

Dr Michael Filous, Senior Vice President and Head of PrimeServ Germany at Everllence, said: “The key benefit of bio-LNG is the reduction in CO2 emissions. A major advantage for the customer is that, provided the fuel gas meets specifications such as methane number, no additional engine modifications are needed. This was the case for the NILS HOLGERSSON.

”TT-Line reports great satisfaction with the positive experience of using renewable fuels through this collaboration. The resulting emission savings help reduce the fleet’s Baltic Sea emissions via pooling – an administrative process supported by supplier certificates documenting the savings from biofuels compared with conventional fuels.

© Shippax