Deep dive: Green ammonia, fertilizers & industrial chemistry — what's working, what's not, and what's next

Ammonia production accounts for approximately 1.8% of global CO2 emissions, roughly 500 million tonnes annually, making it one of the single largest industrial sources of greenhouse gases. The Haber-Bosch process, which has sustained global food production for over a century by converting atmospheric nitrogen into ammonia for fertilizers, consumes approximately 1.2% of global primary energy and relies almost entirely on natural gas as both feedstock and fuel. Decarbonizing ammonia production is therefore not optional for any credible net-zero pathway, and green ammonia, produced using renewable electricity and water, has emerged as the leading candidate for this transition. This deep dive assesses the current state of green ammonia technology and markets across Europe and globally, evaluating what is working, what remains stubbornly challenging, and where the most promising developments are headed.

Why It Matters

Global ammonia production reached approximately 185 million tonnes in 2025, with over 80% consumed as nitrogen fertilizer or fertilizer intermediates. The remaining 20% serves industrial applications including explosives, refrigerants, pharmaceuticals, and increasingly, energy carrier and maritime fuel applications. Ammonia's role in food security is difficult to overstate: synthetic nitrogen fertilizers support approximately half of global food production, and without them, current agricultural output could not sustain a population exceeding 4 billion people, let alone the 8 billion alive today.

For investors evaluating the green ammonia opportunity in Europe, several structural factors create urgency. The EU Carbon Border Adjustment Mechanism (CBAM), which entered its transitional phase in October 2023, will impose carbon costs on imported ammonia and fertilizers starting in 2026. European ammonia producers already face EU Emissions Trading System (ETS) costs exceeding EUR 60 per tonne of CO2, adding approximately EUR 120 to 150 per tonne to conventional ammonia production costs. This carbon price differential creates a window of competitiveness for green ammonia that did not exist five years ago.

The European Commission's REPowerEU plan targets 10 million tonnes of domestic renewable hydrogen production by 2030, with ammonia identified as a primary off-take pathway. National hydrogen strategies in Germany, the Netherlands, Spain, and Denmark all include green ammonia as a priority application. Meanwhile, the International Maritime Organization's revised GHG strategy, adopted in July 2023, targets net-zero emissions from international shipping by approximately 2050, with ammonia identified alongside methanol as a leading candidate for zero-carbon marine fuel. The maritime fuel opportunity alone could generate demand for 100 to 150 million tonnes of green ammonia annually by 2050, nearly doubling current global production.

Key Concepts

Green ammonia refers to ammonia produced through electrolysis of water using renewable electricity to generate hydrogen, which is then combined with nitrogen (separated from air) via the Haber-Bosch process or alternative synthesis routes. The carbon intensity of green ammonia ranges from 0.3 to 0.5 tonnes CO2-equivalent per tonne of ammonia (primarily from upstream renewable energy manufacturing and construction), compared to 1.6 to 2.4 tonnes CO2 per tonne for conventional grey ammonia produced from unabated natural gas.

Electrolyzer technology is the critical bottleneck and cost driver for green ammonia. Three primary electrolyzer types compete for the market. Alkaline electrolyzers are the most mature and lowest cost (EUR 500 to 800 per kW installed in 2025) but offer limited dynamic response. Proton exchange membrane (PEM) electrolyzers provide superior flexibility for coupling with variable renewable generation (EUR 800 to 1,200 per kW) but require iridium and platinum catalysts with constrained supply chains. Solid oxide electrolyzers (SOEC) operate at high temperatures (700 to 900 degrees Celsius) with superior electrical efficiency (up to 85% vs. 60 to 70% for alkaline and PEM) but remain at early commercial scale with limited operating hour track records.

Blue ammonia is the primary competitor to green ammonia, produced from natural gas with carbon capture and storage (CCS) applied to the reforming process. Blue ammonia achieves 85 to 95% carbon capture rates at production costs of $400 to 600 per tonne, significantly below green ammonia's current costs of $700 to 1,200 per tonne. However, blue ammonia's lifecycle emissions depend heavily on upstream methane leakage rates, and studies have demonstrated that at methane slip rates exceeding 2 to 3%, blue ammonia's climate benefit is substantially reduced. The choice between green and blue is not merely technical but involves strategic bets on long-term fossil fuel price trajectories, CCS infrastructure availability, and regulatory treatment of residual emissions.

Ammonia cracking refers to the reverse process of decomposing ammonia back into hydrogen and nitrogen at the point of use. This is relevant for ammonia's emerging role as a hydrogen carrier for long-distance transport. Current cracking technology achieves 70 to 80% energy efficiency with remaining challenges around catalyst durability and trace ammonia contamination in the output hydrogen stream.

What's Working

European First-Mover Projects Reaching Final Investment Decision

Several large-scale green ammonia projects in Europe have advanced beyond feasibility studies into construction or final investment decision (FID) stages, validating both the technology and the business case under current European market conditions.

Yara and Statkraft's Heroya Project in Norway reached FID in 2023 for a 24 MW electrolyzer installation at Yara's existing ammonia plant in Porsgrunn. The project will produce approximately 20,500 tonnes of green ammonia annually, replacing a portion of grey ammonia production. Norway's abundant hydropower provides electricity at approximately EUR 30 to 40 per MWh, and Yara has secured premium off-take agreements with fertilizer customers willing to pay 20 to 30% premiums for certified green ammonia. The Heroya project demonstrates that green ammonia is commercially viable today in regions with low-cost renewable electricity and customers willing to absorb green premiums.

Fertiberia and Iberdrola's Partnership in Spain has commissioned a 20 MW electrolyzer at Fertiberia's Puertollano ammonia plant, with plans to scale to 800 MW by 2027. Spain's solar irradiance delivers capacity factors exceeding 25% for solar PV, yielding levelized costs of electricity below EUR 30 per MWh for dedicated solar installations. Fertiberia reports that green ammonia produced at Puertollano is cost-competitive with grey ammonia inclusive of EU ETS carbon costs, though this calculation depends on ETS prices remaining above EUR 55 per tonne.

NEOM Green Hydrogen Company (a joint venture between ACWA Power, Air Products, and NEOM) in Saudi Arabia, while not a European project, has significant implications for European markets. The $8.4 billion project targets 1.2 million tonnes per year of green ammonia production using 4 GW of dedicated solar and wind capacity. Air Products will import the ammonia to Europe and other markets for cracking back to hydrogen. First production is expected in 2026, and the project's scale is expected to establish benchmark pricing for internationally traded green ammonia.

Fertilizer Premium Markets Validating Willingness to Pay

European agricultural markets are demonstrating measurable willingness to pay for low-carbon fertilizers. Yara's green fertilizer products, marketed under the Yara Climate Choice brand, command premiums of EUR 30 to 80 per tonne over conventional products in Northern European markets. These premiums are supported by downstream food companies (including Nestle, Unilever, and Arla Foods) that have committed to reducing Scope 3 agricultural emissions and are willing to share costs with their farming supply chains.

The EU's Farm to Fork Strategy target of 20% reduction in fertilizer use by 2030, combined with national implementation plans in France, Germany, and the Netherlands, creates regulatory tailwinds for precision application of premium fertilizers over volume-based commodity approaches. This shifts competitive dynamics toward higher-value, lower-volume products where green premiums can be absorbed.

Maritime Fuel Demand Creating a Second Revenue Pillar

The maritime sector's decarbonization timeline is creating a substantial demand signal for green ammonia as marine fuel. MAN Energy Solutions and Wartsila have both developed ammonia-capable marine engines, with the first commercial vessels expected to enter service between 2025 and 2027. Maersk, the world's largest container shipping company, has announced plans to operate ammonia-fueled vessels on European trade routes by 2028. The Port of Rotterdam, Europe's largest, is developing ammonia bunkering infrastructure with initial capacity of 500,000 tonnes per year.

For investors, the maritime opportunity transforms green ammonia from a single-market fertilizer play into a dual-market commodity with diversified demand. Project developers can structure off-take agreements across both fertilizer and fuel markets, improving financing terms and reducing concentration risk.

What's Not Working

Electrolyzer Cost and Supply Chain Bottlenecks

Despite manufacturer claims of rapid cost declines, installed electrolyzer costs in Europe remained stubbornly high through 2025, averaging EUR 1,000 to 1,500 per kW for alkaline systems and EUR 1,500 to 2,200 per kW for PEM systems in actual deployed projects. These figures significantly exceed the sub-EUR 500 per kW targets that many project financial models assumed. The gap reflects supply chain immaturity, limited manufacturing scale, project-specific engineering costs, and the absence of standardized balance-of-plant designs.

European electrolyzer manufacturers (Nel ASA, ITM Power, Siemens Energy, thyssenkrupp nucera) have announced combined manufacturing capacity exceeding 10 GW per year by 2025, but actual production volumes have lagged targets by 40 to 60%, driven by slow order conversion, permitting delays, and workforce shortages in specialized manufacturing.

Renewable Electricity Availability and Grid Constraints

Green ammonia's economics are dominated by electricity costs, which represent 60 to 80% of total production cost. In much of continental Europe, electricity prices remain volatile and elevated, averaging EUR 60 to 90 per MWh in 2024 to 2025 for industrial consumers. At these prices, green ammonia production costs exceed EUR 900 per tonne, well above grey ammonia at EUR 350 to 500 per tonne even with ETS costs included.

Dedicated renewable energy supply through power purchase agreements (PPAs) or co-located generation can reduce electricity costs, but the EU's Delegated Act on renewable hydrogen (effective January 2024) imposes additionality requirements that limit the use of existing grid renewable electricity. Projects must demonstrate that their renewable electricity comes from new generation capacity commissioned within 36 months, creating a chicken-and-egg problem where green ammonia projects cannot proceed without new renewable capacity, and new renewable capacity struggles to secure financing without firm off-take.

Ammonia Safety and Public Acceptance

Ammonia is acutely toxic at concentrations above 300 ppm, and large-scale handling, storage, and transport of ammonia involves significant safety risks. While the industrial chemicals sector has managed ammonia safely for decades, scaling ammonia into new applications (particularly maritime bunkering and distributed hydrogen production) introduces handling scenarios outside established industry practice. Several incidents at ammonia handling facilities in 2023 and 2024 attracted regulatory scrutiny and public opposition, particularly in the Netherlands and Germany, where planned ammonia import terminals face community resistance.

The safety challenge is particularly acute for the maritime fuel application. Ammonia-fueled vessels require ventilation systems, gas detection networks, and crew training protocols that are still being standardized. The International Maritime Organization's interim guidelines for ammonia as ship fuel remain under development, creating regulatory uncertainty that slows shipowner adoption.

What's Next

Electrochemical Ammonia Synthesis

The most transformative technology on the horizon is direct electrochemical ammonia synthesis, which eliminates the Haber-Bosch process entirely by converting nitrogen and water directly to ammonia in an electrochemical cell at ambient temperature and pressure. Research groups at DTU (Technical University of Denmark), Monash University, and several startups (including Nitrofix and Jupiter Ionics) have demonstrated proof-of-concept systems, though current Faradaic efficiencies of 30 to 50% and production rates of milligrams per hour remain far below commercial requirements. If efficiencies reach 60% or above and production scales to kilograms per hour, electrochemical synthesis could reduce green ammonia production costs by 40 to 60% by eliminating the separate hydrogen production step.

Ammonia as Seasonal Energy Storage

Europe's growing renewable electricity surplus during spring and summer months creates an opportunity for ammonia as a seasonal energy storage medium. Excess renewable electricity can produce hydrogen, synthesize ammonia for long-term storage (ammonia liquefies at minus 33 degrees Celsius or 10 bar at ambient temperature), and generate electricity through ammonia-fueled gas turbines or fuel cells during winter demand peaks. Mitsubishi Power and IHI Corporation are developing ammonia co-firing and dedicated ammonia gas turbine technology, with 20% co-firing demonstrated at commercial scale and 100% ammonia turbines expected by 2028.

European Regulatory Convergence

The convergence of CBAM implementation, ETS reform (including the phase-out of free allowances for fertilizer production by 2034), and the Renewable Energy Directive's renewable hydrogen certification framework is creating a progressively favorable competitive environment for green ammonia in Europe. By 2028, the combined carbon cost burden on conventional ammonia production is projected to reach EUR 180 to 240 per tonne, narrowing the green premium to near zero in regions with abundant renewable electricity.

Green Ammonia Production Cost Benchmarks

Component	Share of Total Cost	Current Range (2025)	Target (2030)
Renewable Electricity	60-80%	EUR 30-90/MWh	EUR 20-40/MWh
Electrolyzer CAPEX	10-20%	EUR 800-1,500/kW	EUR 300-500/kW
Air Separation Unit	3-5%	EUR 15-25/tonne NH3	EUR 10-15/tonne NH3
Haber-Bosch Synthesis	5-10%	EUR 40-80/tonne NH3	EUR 30-50/tonne NH3
Total Green Ammonia Cost	100%	EUR 700-1,200/tonne	EUR 350-550/tonne

Action Checklist

• Evaluate portfolio exposure to conventional ammonia and fertilizer assets for carbon price sensitivity
• Map green ammonia project pipelines in target regions against renewable electricity availability
• Assess electrolyzer manufacturer order books and delivery timelines before committing to project schedules
• Model green ammonia economics under multiple electricity price and carbon price scenarios
• Evaluate dual off-take structures spanning fertilizer and maritime fuel markets for risk diversification
• Monitor EU Delegated Act additionality requirements and their impact on project permitting timelines
• Track electrochemical ammonia synthesis development milestones as a potential disruptive technology risk
• Engage with maritime fuel standardization processes to position for ammonia bunkering infrastructure investment

Sources

• International Energy Agency. (2025). Ammonia Technology Roadmap: Towards More Sustainable Nitrogen Fertiliser Production. Paris: IEA Publications.
• European Commission. (2023). Delegated Regulation on Renewable Hydrogen: Additionality, Temporal, and Geographic Correlation Requirements. Brussels: EC.
• International Renewable Energy Agency. (2024). Innovation Outlook: Renewable Ammonia. Abu Dhabi: IRENA Publications.
• Royal Society. (2024). Green Ammonia: Synthesis, Applications, and Sustainability Assessment. London: The Royal Society.
• BloombergNEF. (2025). Hydrogen and Ammonia Market Outlook: Cost Curves, Project Pipeline, and Policy Analysis. London: Bloomberg LP.
• Yara International. (2025). Annual Report 2024: Green Ammonia Strategy and Project Updates. Oslo: Yara International ASA.
• International Maritime Organization. (2024). Interim Guidelines for the Safety of Ships Using Ammonia as Fuel. London: IMO Publications.