The Importance of Addressing Methane Slip in the Maritime Industry

As the shipping industry transitions to liquefied natural gas (LNG) as a transitional fuel towards achieving the net-zero emissions target by 2050 set by the International Maritime Organisation (IMO), the issue of methane slip becomes crucial for vessel owners and operators. According to Clarksons Research, alternative fuel investments have been on the rise, with LNG being a popular choice due to uncertainties surrounding the availability and pricing of future sustainable fuels.

Methane slip, the unintended release of unburned methane during combustion, is a significant environmental concern given methane’s high global warming potential compared to carbon dioxide. To address this issue, innovative solutions are being developed to minimize methane emissions and enhance the sustainability and efficiency of maritime operations.

Methane Slip in the Maritime Industry

LNG offers environmental benefits such as lower CO2 emissions and reduced nitrogen oxides compared to traditional marine fuels. However, methane slip poses a challenge to LNG’s long-term viability as a marine fuel. To mitigate methane emissions, advancements in engine technology, combustion efficiency, and fuel management are essential.

Wärtsilä, a leading marine engine manufacturer, has developed NextDF technology to improve combustion efficiency and reduce methane slip. This technology optimizes fuel distribution within the combustion chamber, minimizing unburned methane emissions and enhancing the economic viability of using LNG as a marine fuel.

The Role of Bio-LNG in Future Fuels

In addition to LNG, the maritime industry is exploring Bio-LNG as a sustainable fuel option derived from biomass sources. Bio-LNG offers a drop-in solution compatible with existing infrastructure and engines, facilitating a seamless transition to lower-carbon operations. The flexibility of LNG engines to switch to Bio-LNG without major modifications makes it a critical component in the industry’s decarbonization strategy.

Estimates suggest that Bio-LNG could meet a significant portion of the shipping sector’s energy demand by 2030 and beyond. When blended with fossil LNG, Bio-LNG’s contribution to energy demand coverage expands, making it a viable and sustainable fuel option for the maritime industry.

Adding Methane Slip into the Equation

Accurate measurement and reporting protocols for methane emissions are essential for establishing transparent emissions inventories and ensuring regulatory compliance. Enhanced measurement techniques will enable better monitoring and management of methane slip, contributing to informed decision-making and sustainable operations.

As the maritime industry moves towards a multi-faceted approach to reducing greenhouse gas emissions, advancements in engine technologies, cleaner fuels, and operational strategies will play a crucial role. The integration of hybrid solutions, retrofittable engine upgrades, and emerging fuel technologies like ammonia and methanol will further diversify the toolkit available to ship operators striving for sustainability.