Under a joint project, the duo have said they aim to build a system to purify hydrogen using membrane separation from hydrogen-nitrogen mixture gas generated during ammonia cracking.

Despite ammonia being set to play a significant role in the transport of hydrogen, purifying hydrogen after ammonia cracking is crucial to allow the energy carrier to meet strict purity requirements for use in various applications. In fuel cells, impurities can poison catalysts, reducing efficiency and lifespan.

Membrane separation works like a filter that only allows hydrogen gas to pass through while blocking other gases such as nitrogen and leftover ammonia.

With goals to achieve “early commercialisation,” the plans come as Japan looks to bolster its national hydrogen supply, with imports of ammonia looking likely to play a significant role.

A 2023 Hydrogen Council report said the nation would need to replace its current LNG imports and coal infrastructure with hydrogen and its derivatives alongside wind and solar developments to decarbonise.

Read more: Japan to rely on imported hydrogen and ammonia forecasts Hydrogen Council

By combining MHI’s experience in delivering ammonia and other chemical plants with NGK’s knowledge of sub-nano-ceramic membrane technology, the pair hope the development will “contribute to the stable supply of hydrogen.”