Extracts pure oxygen, removing nitrogen to eliminate smog-forming NOx emissions.
Fuel reacts with pure oxygen to generate heat, producing an exhaust of only CO₂ and steam.
Heated supercritical CO₂ and steam expand through a turbine to generate electricity.
As exhaust cools, the steam condenses and the water is removed, leaving a dry, high-purity CO₂ stream.
Excess CO₂ is injected into deep geologic formations for permanent sequestration.
Remaining CO₂ is recirculated as the working fluid, enabling a continuous power cycle with zero atmospheric emissions.
Extracts pure oxygen, removing nitrogen to eliminate smog-forming NOx emissions.
Fuel reacts with pure oxygen to generate heat, producing an exhaust of only CO₂ and steam.
Heated supercritical CO₂ and steam expand through a turbine to generate electricity.
As exhaust cools, the steam condenses and the water is removed, leaving a dry, high-purity CO₂ stream.
Excess CO₂ is injected into deep geologic formations for permanent sequestration.
Remaining CO₂ is recirculated as the working fluid, enabling a continuous power cycle with zero atmospheric emissions.
Two system architectures.
Two very different results.
Air
Air is nearly 80% nitrogen and only
~20% oxygen.
Air
Ambient air is the starting point.
Oxygen extraction
Removing nitrogen upstream enables clean, controlled combustion.
Combustion
Burning fuel in air creates a heavily diluted exhaust and forms NOx.
Combustion
Fuel burns in pure oxygen, producing a concentrated CO₂ and water stream with no dilution.
Mixed exhaust
CO₂ makes up only ~4% of the exhaust, making separation difficult.
80-90% CO2
captured
Low CO₂ concentration and low exhaust pressure make capture slow.
Pure CO2
Captured
CO₂ is produced directly at high purity and pressure, without chemical solvents or secondary processing.
Emissions
Residual NOx, SOx, CO₂, and particulate matter are released into the atmosphere.
Emissions
None
Large footprint
Large exhaust volumes require bulky capture equipment and additional compression.
Compact footprint
High purity and pressure eliminate bulky capture equipment, enabling a much smaller, cheaper system.
Air
Air is nearly 80% nitrogen and only
~20% oxygen.
Combustion
Burning fuel in air creates a heavily diluted exhaust and forms NOx.
Mixed exhaust
CO₂ makes up only ~4% of the exhaust, making separation difficult.
80-90% CO2
captured
Low CO₂ concentration and low exhaust pressure make capture slow.
Emissions
Residual NOx, SOx, CO₂, and particulate matter are released into the atmosphere.
Large footprint
Large exhaust volumes require bulky capture equipment and additional compression.
Air
Ambient air is the starting point.
Oxygen extraction
Removing nitrogen upstream enables clean, controlled combustion.
Combustion
Fuel burns in pure oxygen, producing a concentrated CO₂ and water stream with no dilution.
Pure CO2
Captured
CO₂ is produced directly at high purity and pressure, without chemical solvents or secondary processing.
Emissions
None
Compact footprint
High purity and pressure eliminate bulky capture equipment, enabling a much smaller, cheaper system.
Supercritical CO₂ is a dense, efficient working fluid that enables smaller, more power-dense turbomachinery than traditional steam or air cycles.
By combusting fuel in pure oxygen instead of air, Arbor produces an exhaust of only CO₂ and water, simplifying separation and storage.
Arbor applies rocket-grade turbomachinery design to deliver extraordinary power density: compact components that produce engine-scale outputs.
Perspectives from the engineers turning ideas into infrastructure.
Our team includes aerospace engineers, turbomachinery experts, and system builders who’ve worked on some of the most demanding machines ever created. That discipline now guides the energy systems we’re building on Earth. These systems are built to run continuously, control emissions at the source, and scale reliably.
