Where does ammonia as a clean fuel make the most sense right now?
Ammonia works best in regions with abundant, cheap renewable energy and short transport distances to users. A 2026 techno-economic study of four sites in the Horn of Africa found that wind-based green ammonia production in Ghoubet, Djibouti could achieve costs as low as $438 per ton if production is scaled up 50%, thanks to excellent wind resources and multimodal transport links [1]. By contrast, inland sites like Addis Ababa had higher costs because of poorer renewable resources and longer logistics chains [1]. This means that the first large-scale deployments will likely be in places like the Horn of Africa, the Middle East, or Australia — not in Europe or North America, where renewable energy is more expensive.
In the maritime sector, ammonia also shows promise because ships can carry their fuel as cargo. A 2021 economic analysis of an ammonia-fueled ammonia carrier (a ship that transports ammonia) found that installing separate fuel tanks (rather than burning cargo) yielded a profit of $739.5 million over the ship's life, compared to $684.3 million for burning cargo — a $55 million advantage [3]. However, the study also showed that profits are highly sensitive to fuel price: a 25% change in ammonia fuel price caused a 15% change in profit, and a 25% change in transport fees caused a 45% change [3]. So ammonia shipping is viable only when fuel and transport costs are stable and low.
What are the biggest barriers to large-scale ammonia deployment?
The main barriers are safety, infrastructure cost, and the need for new engines and training. Ammonia is toxic and corrosive, which means handling it requires strict safety protocols, specialized crew training, and modified equipment — all of which add cost and complexity. A 2024 review of ammonia as an aviation fuel noted that while ammonia benefits from an existing supply chain in the fertilizer industry, its higher toxicity compared to hydrogen or jet fuel is a major concern [4]. Similarly, a 2024 SWOT analysis for maritime use identified the need for 'significant investments in infrastructure, ship modifications, and green ammonia production facilities' as a key threat, along with the lack of standardized regulations and public acceptance [5].
One promising workaround is to use aqua-ammonia — a liquid mixture of ammonia and water — instead of pure ammonia. A 2026 study found that aqua-ammonia is safer to transport (less toxic and corrosive), compatible with existing natural gas pipelines, and can deliver both energy and water to power plants through a single pipeline [2]. The study modeled a 200 MW steam power plant running on ammonia extracted from aqua-ammonia and achieved a net efficiency of 35.07%, which is higher than comparable natural gas plants [2]. The best separation method (membrane separation) caused only a 1.2% efficiency penalty [2]. This suggests that aqua-ammonia could lower the infrastructure barrier, but it is still at the research stage — no large-scale demonstration exists yet.
So, is ammonia ready for large-scale deployment?
No, not yet — but the pieces are falling into place. The technical feasibility is proven: ammonia can be produced from renewable energy [1], used to generate electricity [2], and transported as a marine fuel [3]. However, the economics are still marginal and highly location-dependent. The lowest production cost found in the studies here is $438 per ton in Djibouti [1], but that requires scaling up production by 50% and assumes excellent wind resources. For comparison, current fossil-based ammonia costs around $200–300 per ton, so green ammonia needs to come down further or carbon prices need to rise.
The safety and infrastructure challenges are real but not insurmountable. Aqua-ammonia offers a path to use existing gas pipelines [2], and the maritime industry is actively developing ammonia-ready ships [3][5]. The aviation sector is further behind, with ammonia still at the conceptual stage for aircraft [4]. Overall, the evidence suggests that ammonia will see niche, large-scale deployment within 5–10 years in specific regions and sectors (e.g., shipping from the Horn of Africa), but it is not a drop-in replacement for fossil fuels globally.
About These Sources
This answer is built on 5 peer-reviewed studies — published from 2021 to 2026, 4 from 2024 or later, 2 in Q1 journals — selected as the most relevant from 5 studies that passed quality screening, drawn from 46 papers retrieved from a database of over 500 million.
Sources used in this answer
Strategic and scalable green ammonia deployment in Africa: Leveraging wind-solar resources and transport networks
In a techno-economic assessment of four sites in the Horn of Africa, wind-based green ammonia production in Ghoubet, Djibouti achieved the highest output (1,237 tons/year) and the lowest potential cost ($438/ton with 50% scale-up), while transport logistics significantly affected competitiveness.
Utilizing aqua-ammonia as a clean and scalable fuel in steam power plants
A thermodynamic model of a 200 MW steam power plant fueled by ammonia extracted from aqua-ammonia achieved 35.07% net efficiency (higher than comparable natural gas plants), with membrane separation causing only a 1.2% efficiency penalty and the potential to deliver both energy and water via a single pipeline.
Economic Evaluation of an Ammonia-Fueled Ammonia Carrier Depending on Methods of Ammonia Fuel Storage
An economic evaluation of an 84,000 m³ ammonia carrier found that installing separate fuel tanks (rather than burning cargo) yielded $739.5 million profit vs. $684.3 million, but profits were highly sensitive to fuel price (±25% change caused ±15% profit change) and transport fees (±25% change caused ±45% profit change).
Challenges and Opportunities of Ammonia as a Zero-Emission Aircraft Fuel
A review of ammonia as an aviation fuel identified its robust existing supply chain and non-coking properties as strengths, but noted higher toxicity compared to hydrogen and jet fuel as a key challenge, with heat exchangers for engine intercooling shown to be feasible.
Ammonia: a clean fuel for a cleaner future
A SWOT analysis for ammonia as a marine fuel highlighted zero CO₂ emissions and higher energy density than hydrogen as strengths, but identified the need for significant infrastructure investment, ship modifications, crew training, and standardized regulations as major barriers.