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Manifold Times | NEDO supports Japanese firms’ methane slip reduction project for shipping Manifold Times | NEDO supports Japanese firms’ methane slip reduction project for shipping
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NEDO supports Japanese firms’ methane slip reduction project for shipping

28 Oct 2021

Hitachi Zosen Corporation, Mitsui O.S.K. Lines, Ltd.(MOL) and Yanmar Power Technology Co., Ltd. (YPT) on Wednesday (27 October) said they have proposed to develop a methane slip reduction technology for liquefied natural gas (LNG) fuelled vessels by improving catalysts and engines.

The Development of Next Generation Vessels Project with Hitachi Zosen as the managing company is publicly solicited by the New Energy and Industrial Technology Development Organization (NEDO) and is under the Green Innovation Fund.  The  proposal was adopted.

In recent years, environmental awareness, including responses to climate change, has been increasing worldwide. Against this backdrop, the shipping industry is also working on various technological and business developments to realize a low-carbon society, it states.

One of these efforts is the introduction in various parts of the world of LNG-fueled ships, which have a low environmental impact. LNG fuel has the effect of reducing carbon dioxide (CO2) emissions, but engines using LNG can be prone to the problem of methane slip, where unburned fuel is expelled in the exhaust, it states. 

Reducing methane slip is a pressing issue in engine design. In this project, the partners aim to achieve a methane slip reduction rate of more than 70% for LNG-fuelled vessels over a six-year period from FY2021 to FY2026. 

The reduction will be achieved by combining methane oxidation catalysts and engine improvements thereby further reducing the environmental impact of LNG-fuelled vessels. 

YPT will also commission Namura Shipbuilding Co., Ltd. (Namura Shipbuilding), together with Hitachi Zosen and MOL to establish the technology to install the system developed in this research on actual ships.

The system will be installed in a coal carrier built at the Namura Shipbuilding and operated by MOL for demonstration of the methane slip reduction technology. 

The partners will work to establish the technology as soon as possible with a view to utilising carbon-recycled methane in future applications, reducing greenhouse gas emissions to zero by 2050 towards realizing a carbon-neutral society.

Methane slip 

A portion of the methane in LNG fuel is exhausted into the atmosphere as unburned methane. Methane has a higher greenhouse effect than CO2, and methane slip reduction is required from the perspective of greenhouse gas reduction.

 

Photo credit: Mitsui O.S.K. Lines
Published: 28 October, 2021

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