What Are the Real Use Cases for Green Ammonia?

If green ammonia is to become a meaningful part of Australia’s energy transition, the key question is simple: where will it actually be used?

Fertiliser: The Immediate and Largest Market

The largest and most mature use case for ammonia is in fertiliser production.

Globally, ammonia is a critical input for nitrogen-based fertilisers, which underpin modern agriculture. Today, almost all ammonia is produced using fossil fuels, making it a significant source of industrial emissions.

This creates a clear pathway for green ammonia: it can directly replace conventional (grey) ammonia without changing end-use demand.

From a market perspective, this is important. Unlike many new energy technologies, green ammonia does not need to create a new market from scratch. It can scale by decarbonising an existing, global commodity market.

For Australia, this also aligns with domestic industrial use as well as export potential.

Shipping Fuel: A High-Potential but Emerging Market

Another widely discussed application is low-carbon shipping fuel.

The global shipping industry faces increasing pressure to reduce emissions, particularly under targets set by the International Maritime Organization (IMO). Ammonia is considered a promising candidate because it contains no carbon at the point of use.

However, this market is still developing. Key challenges include:

• engine technology readiness
• fuel handling and safety standards
• nitrogen oxide (NOx) emissions control
• fuel supply infrastructure

As a result, while shipping is often highlighted as a major future demand source, it remains a medium- to long-term opportunity rather than an immediate driver.

Hydrogen Carrier: Enabling Long-Distance Trade

One of the most strategically important roles of ammonia is as a carrier for hydrogen.

Hydrogen is difficult to transport over long distances, especially in its pure form. By converting hydrogen into ammonia, it becomes easier to store, ship, and handle using existing infrastructure such as ports and storage terminals. This is particularly relevant for Australia.

As a geographically large country with strong renewable resources but relatively limited domestic demand, Australia’s long-term opportunity lies in exporting low-carbon energy to international markets such as Japan and South Korea.

In this context, green ammonia acts as a bridge between renewable electricity production and global energy trade.

Export Commodity: Australia’s Strategic Opportunity

Beyond individual use cases, green ammonia’s most important role in Australia may be as an export product.

Australia has historically been a major exporter of coal, liquefied natural gas (LNG), and minerals. As global markets move toward decarbonisation, there is growing interest in whether the country can maintain that position by exporting low-carbon molecules instead of fossil fuels. Green ammonia is one of the leading candidates for this transition.

It is already traded internationally, compatible with existing logistics systems, and increasingly aligned with the decarbonisation goals of key Asian trading partners.

This is why Australian policy—particularly at the state level—has begun to emphasise ammonia alongside hydrogen as part of future export strategies.

What This Means for the Market

For Australia, these use cases point to a clear opportunity.

The country is not only well positioned to produce green hydrogen—it is also well positioned to convert that hydrogen into ammonia and supply global markets that already understand how to use it.

This is why many Australian projects are being designed with ammonia export in mind from the outset.

The key insight is this: green ammonia works not because it is new, but because it fits into systems that already exist.

And that is exactly what makes it commercially powerful.