Green fuel

LNG means up to 23% less emissions

by Port News Editorial Staff

The use of Liquefied Natural Gas in maritime transportation can offer a Co2 reduction of up to 23%, depending on the technologies used.

The figure emerges from a new study commissioned to the consultancy firm Sphera by Sea-LNG and SGMF (Society for Gas as a Marine Fuel).

The study is based on data provided by ship engine factories and major oil companies and updates the results of research conducted in 2018/2019, offering new insights into the green fuel’s potential.

According to researchers, LNG can guarantee a reduction in the order of 14% -23% for two-stroke engines (slow-speed engines) fitted on board the biggest ships, while for  four-stroke engines (medium-speed engines) the reductions range from 6% to 14%.

In addition to providing greater Co2 reductions, two-stroke engines are responsible for a lower loss of unburned methane, which represents a significant source of upstream emissions. The global warming potential of methane is significantly greater than that of CO2.

However, analysts say that the environmental impact produced by methane spills in shipping will be zeroed out by 2030 thanks to the introduction of new technologies in ship engines.

Translation by Giles Foster

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