South Korean breakthrough tech set to reshape transportation: scientists say

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• Turning ammonia into hydrogen without carbon emissions
• Key components: ruthenium, pressure swing adsorption, and reuse of gases
• What the reactor setup looks like and how it functions
  • Operational steps in brief
• Performance: purity and potential uses
• How this differs from current hydrogen production
• Benefits and technical hurdles
• Global context: other clean hydrogen experiments
• What KIER’s team says about scale and impact

South Korean researchers have unveiled a clean method to extract hydrogen from ammonia that could reshape transport and energy storage. Their approach avoids burning fossil fuels and produces ultraclean hydrogen, using a mix of metals and engineered processes to free hydrogen from ammonia’s chemical bonds.

Turning ammonia into hydrogen without carbon emissions

Scientists at the Korea Institute of Energy Research (KIER) developed a thermal-chemical route that cracks ammonia into hydrogen and nitrogen. The process runs at high temperatures near 1,112°F and relies on a tailored catalyst to accelerate the reaction.

Instead of feeding natural gas to generate heat, the system achieves required temperatures with a controlled reaction cycle. That means no direct combustion of fossil fuels and no associated carbon dioxide release during hydrogen production.

Key components: ruthenium, pressure swing adsorption, and reuse of gases

The method combines several elements from the periodic table with engineered adsorption technology.

• Ruthenium catalyst: A platinum-group metal that promotes ammonia decomposition efficiently.
• Pressure swing adsorption (PSA): A separation step that isolates hydrogen from nitrogen and other impurities.
• Gas recycling: Hydrogen-rich off-gas is fed back to sustain the high temperatures, reducing external energy needs.

This blend of chemistry and process engineering produces a stream of very pure hydrogen suitable for sensitive uses.

What the reactor setup looks like and how it functions

The pilot device sits inside a squared metal frame and is plumbed with pipes, valves, and gauges. Several cylindrical vessels the size of hot-water tanks handle gas flow and adsorption duties.

Operational steps in brief

1. Ammonia is introduced to the reactor and contacts the catalyst at high heat.
2. Ammonia molecules split into hydrogen and nitrogen.
3. PSA removes nitrogen and other gases, leaving concentrated hydrogen.
4. Surplus hydrogen-nitrogen mix is routed back to help maintain reactor temperature.

Engineers designed the loop so the system largely powers its own thermal needs once the cycle is established.

Performance: purity and potential uses

KIER reports hydrogen output with exceptional purity, exceeding 99.97% in tests. Such quality meets fuel cell standards for transport and stationary power.

• Fuel cell vehicles: The hydrogen can feed onboard fuel cells for cars, buses, and trucks.
• Powering buildings: Fuel-cell units can supply emission-free electricity and heat to commercial sites.
• Energy storage and transport: Ammonia itself doubles as a dense carrier for hydrogen, simplifying logistics.

Because ammonia production already uses hydrogen, shipping ammonia and converting it on demand could be cost-effective for long-distance supply chains.

How this differs from current hydrogen production

Most industrial hydrogen today comes from natural gas through steam methane reforming. That path emits carbon unless paired with expensive carbon capture.

KIER’s approach avoids methane use entirely. By generating process heat internally and using a ruthenium catalyst, the team sidesteps the large CO2 footprint tied to conventional hydrogen manufacture.

Benefits and technical hurdles

• Benefits: Near-zero direct emissions, high hydrogen purity, and compatibility with existing ammonia logistics.
• Hurdles: Scaling up the reactor design, securing catalyst supply, and reducing capital costs.
• Operational questions: Long-term catalyst durability and integration with renewable energy sources.

Global context: other clean hydrogen experiments

Researchers worldwide are pursuing alternate routes to low-carbon hydrogen. Teams at Cambridge and elsewhere are exploring solar-driven systems, such as artificial leaf technologies that split water and generate hydrogen while producing fresh water.

These diverse efforts share a goal: decouple hydrogen production from fossil fuels and lower the greenhouse gas footprint of transport, power, and industry.

What KIER’s team says about scale and impact

KIER researchers argue the technology could make a meaningful contribution as it grows. They point to the dual advantage of using ammonia as a transport medium and producing ultra-pure hydrogen when needed.

Scaling up could expand clean hydrogen availability for vehicles and buildings, the researchers say, emphasizing the potential for real-world deployment beyond laboratory demonstrations.