In 2022, Hitachi Zosen and the Yanmar PT developed the “Methane Oxidation Catalyst System” which reduces methane slip by oxidising methane emitted from marine engines fueled by LNG and received  NK’s “Approval in Principle”.

In December 2023 a land based test achieved a reduction rate 93,8% far exceeding the target of more than 70%, by combining engine improvements with EGR and a methane oxidation catalyst system, and the vehicle was the first in the world to receive the SOF from NK. The results were highly evaluated and passed the screening by NEDO for selection for continued support in February 2024. The demonstration test will start in the autumn of 2024 on a large coal carrier (vessel name: REIMEI) operated by MOL.

In July 2023, the International Maritime Organization (IMO) adopted a new plan to achieve zero emissions by around 2050, and the Maritime Cluster※5 has been developing new technologies to convert ships’ fuels into new fuels that emit less greenhouse gases.

As for fuels for ships, methanol, ammonia and hydrogen are being considered as future option. However, the widespread use of LNG fuel is currently being promoted as a low emission fuel that is feasible at present. Nevertheless, while LNG fuel has the potential to reduce CO2 emissions, methane slip is an issue.The Hitachi Zosen, MOL, and Yanmar PT will work to quickly establish a technique for reducing methane slip through this project and actively contribute to reducing greenhouse gases emissions in the global marine transportation sector.