The next great transformation in aviation may begin on the ground.
Battery-electric aircraft are moving from concept to early commercial reality. The first markets will likely be short regional routes, island connections, training aircraft, air taxis, and small commuter planes. These aircraft will not need jet fuel. They will need large amounts of electricity, delivered reliably and quickly at airports.
That creates a new question: what kind of energy system should power the charging infrastructure for electric aviation?
The obvious answer is renewable electricity from the grid. But there is an even more powerful possibility: airports can combine renewable electricity with local biogas-based oxyfuel combined heat and power systems with carbon capture and storage.
This creates a remarkable vision.
Airports could become energy hubs that charge electric aircraft, supply heat to airport buildings, support the local grid, and remove carbon dioxide from the atmosphere.
In this model, the airport is not merely a place where lower-emission aircraft take off. It becomes part of a carbon-removal system.
Electric aviation needs more than chargers
The coming wave of battery-electric aircraft will require high-power charging. A small regional airport serving electric commuter aircraft may need megawatt-scale charging capacity. A larger airport supporting multiple electric routes may need much more.
This charging demand will not be constant. Aircraft charging will occur in bursts, linked to flight schedules. A plane lands, passengers disembark, the aircraft is cleaned and prepared, and then the battery must be recharged quickly enough for the next departure.
That creates concentrated electricity demand at specific times of day.
Grid connections can be upgraded, but this may be expensive and slow. Many smaller airports are in areas where the local grid was not designed for repeated high-power charging. At the same time, airports already have significant energy needs: terminal heating, hangars, workshops, lighting, ground vehicles, de-icing systems, and backup power.
This is where a local energy hub becomes attractive.
Instead of treating aircraft charging as an isolated electrical load, the airport can integrate charging with heat, power, storage, and carbon capture.
Biogas can provide dispatchable clean power for airport charging
Biogas is a storable renewable fuel. It can be produced from food waste, manure, sewage sludge, agricultural residues, and other organic streams. Unlike wind and solar, it can be stored and used when needed.
That makes it valuable for airports.
An airport with access to regional biogas could use it in a stationary combined heat and power plant. The plant would generate electricity for aircraft charging and airport operations, while also producing useful heat for terminals, hangars, maintenance buildings, hotels, cargo facilities, or nearby district heating networks.
This is already a better use of biogas than burning it in buses, trucks, or airport ground vehicles. Those vehicles should be battery-electric wherever possible. Electric motors are more efficient, cheaper to maintain, and increasingly superior on total life-cycle cost.
Biogas should instead be reserved for applications where it does something electricity alone cannot easily do: provide storable, dispatchable energy with recoverable heat and capturable biogenic CO₂.
At airports, that combination is especially valuable.
Oxyfuel combustion turns biogas power into carbon removal
The key is not simply to burn biogas. The key is to burn it in an oxyfuel combustion system.
In conventional combustion, fuel is burned in air. Since air is mostly nitrogen, the exhaust is diluted with a large volume of nitrogen. Capturing CO₂ from that diluted exhaust is technically possible, but expensive.
Oxyfuel combustion works differently. The fuel is burned with nearly pure oxygen instead of air. This means the flue gas is mainly water vapor and CO₂. When the water vapor is condensed, a concentrated CO₂ stream remains.
That makes carbon capture much simpler.
When the fuel is biogas, the carbon is biogenic. It came recently from the atmosphere through plants and organic matter. If the CO₂ from biogas combustion is captured and permanently stored underground, the system can achieve net carbon removal.
This is the breakthrough idea: the same energy system that charges electric aircraft can also remove CO₂ from the atmosphere.
The airport becomes a carbon-removing energy node.
Air travel that removes CO₂ from the atmosphere
Electric aircraft already eliminate direct in-flight combustion emissions. There is no jet fuel burned during flight, no local exhaust plume, and no CO₂ emitted from the aircraft itself.
But if the electricity used to charge the aircraft comes from a biogas oxyfuel CHP plant with carbon capture and storage, the climate effect goes further.
Each flight would be powered by electricity associated with permanent removal of biogenic CO₂. The aircraft would not merely be lower-emission. It could be part of a net carbon-removal chain.
This changes the narrative of regional aviation.
For decades, air travel has been treated as one of the hardest sectors to decarbonize. Long-haul aviation will remain difficult. But short-haul aviation is different. Short regional routes are exactly where battery-electric aircraft can first compete.
If those aircraft are charged with carbon-removing electricity, short-haul flights could become climate-positive rather than climate-damaging.
A passenger flying between two regional cities could be traveling in an aircraft that produces no combustion emissions in flight, while the airport energy system that charged it has captured and stored more CO₂ than the flight caused across its operating energy chain.
That is a radically different future for aviation.
The regional airport as a carbon-removal platform
Small and medium-sized airports are ideal places to test this model.
They often have manageable energy demand, available land, nearby organic waste resources, and strong local interest in maintaining air connectivity. Many also serve regions where road or rail alternatives are slow, mountainous, coastal, or weather-exposed.
A regional airport energy hub could include several integrated components:
- Battery-electric aircraft charging
- Battery-electric ground support equipment
- Stationary battery storage
- Biogas-fueled oxyfuel combined heat and power
- Heat recovery from the CHP plant for airport buildings and nearby users
- CO₂ compression and temporary storage
- Transport of captured CO₂ to permanent geological storage
- Smart control systems that optimize charging, heat production, and grid interaction
This creates multiple revenue and value streams.
The airport can sell aviation charging, reduce its own energy costs, supply heat, provide grid support, and generate certified carbon removal credits. Local municipalities can send organic waste into a higher-value climate pathway. Regional airlines can offer genuinely low-carbon or even carbon-removing flights.
The result is not just a cleaner airport. It is a new kind of infrastructure.
Why this is better than using biogas as a feedstock to make aviation fuel
Some may argue that biogas could be upgraded into biomethane refined to aviation fuel or used directly as a fuel. But for aviation, this is not the right direction.
Aircraft need extremely energy-dense fuels, and methane is not a simple drop-in replacement for jet fuel. More importantly, using biogas in any mobile combustion system loses the main advantage of stationary oxyfuel combustion: cheap and simple CO₂ capture.
A moving aircraft cannot practically carry a carbon capture system. A stationary power plant can.
That is why the best aviation role for biogas is not as an onboard fuel. It is as a carbon-removing energy source on the ground, charging aircraft that fly on batteries.
This division of labor is elegant.
The aircraft uses the best propulsion technology for short routes: batteries and electric motors.
The airport uses the best carbon-removal configuration for biogas: stationary oxyfuel combustion with heat recovery and CO₂ capture.
Each technology is used where it performs best.
A practical pathway for airports
This vision does not require every airport to become energy-independent. The grid will remain central. Wind, solar, hydropower, and batteries will provide much of the electricity for electric aviation.
But biogas oxyfuel CHP with CCS can play a special role. It can provide dispatchable power during peak charging periods, useful heat during cold seasons, backup capacity during grid constraints, and verified carbon removal over the full year.
The first projects should focus on airports with five characteristics.
They should have expected demand for short-haul electric aviation. They should be near biogas production or organic waste resources. They should have meaningful heat demand on site or nearby. They should have access to CO₂ transport and storage infrastructure. And they should have grid constraints or high grid-upgrade costs that make local generation valuable.
Norway, Sweden, Denmark, Finland, Scotland, Canada, and island regions are obvious candidates. Many have short regional air routes, cold climates, strong electrification policies, biogas resources, and growing interest in carbon capture and storage.
For these regions, the carbon-removing airport could become a practical early market.
From airport emissions to airport removals
Today, most airport climate strategies focus on reducing emissions: electrifying ground vehicles, improving building efficiency, buying renewable power, and supporting sustainable aviation fuels.
Those steps are important. But they still frame the airport as an emissions problem to be minimized.
The next step is more ambitious.
Airports can become carbon-removal assets.
By integrating battery-electric aircraft charging with biogas-based oxyfuel CHP and permanent CO₂ storage, airports can help transform aviation from a source of emissions into a driver of atmospheric carbon removal.
This will not solve all aviation emissions. Long-haul flights will still need other solutions. But for short regional routes, the direction is clear.
Battery-electric aircraft can eliminate combustion in the air.
Oxyfuel biogas CHP with CCS can remove carbon on the ground.
Together, they create a new proposition: air travel that does not merely reduce its climate impact but actively helps reverse it.
The future airport could be more than a transport hub.
It could be a carbon-removing power plant with runways.
