Capture engineered around the flue, not a lab bench.
Withinair's capture skids are designed source-first: the contactor chemistry, heat integration, and footprint are matched to the flue gas of the specific industrial process, not the other way around.
From flue gas to pipeline-ready CO2.
Four stages run continuously alongside the host facility, tuned to its duty cycle.
Divert & cool
A slipstream of flue gas is drawn off the existing duct, cooled, and scrubbed of particulates before it enters the contactor.
Contact & bind
Gas passes through a solvent or solid-sorbent contactor where CO2 binds selectively, letting the remaining stream vent as before.
Strip & release
Heat (often recovered from the process itself) releases the bound CO2 from the solvent or sorbent, which is then recycled through the loop.
Compress & verify
CO2 is dried, compressed to pipeline spec, metered, and logged — ready for sequestration, mineralization, or reuse.
We choose the chemistry that fits the flue.
Not every exhaust stream behaves the same way. Withinair fields two capture chemistries and picks — or blends — based on gas composition, temperature, and duty cycle.
Amine-based absorption
Best suited to high-volume, steady-state streams like power and cement. Mature chemistry, high capture rates, well-understood regeneration energy.
- → Capture rate: up to 95%
- → Best for: continuous, high-flow sources
- → Footprint: larger, ground-mounted skid
Structured sorbent beds
Modular and better suited to cyclical or lower-volume sources — chemicals, waste-to-energy, and marine auxiliary power.
- → Capture rate: up to 90%
- → Best for: variable-load, compact installs
- → Footprint: skid-mounted, stackable modules
Typical Withinair capture skid
| Capture rate | 90–95% |
| Output purity | ≥ 97.5% |
| Capacity range | 50k – 2M tCO2/yr |
| Deployment format | Skid-mounted, modular |
| Typical retrofit time | 12–18 months |
Figures are representative pilot-scale targets and vary by site conditions, flue composition, and integration scope.
Every ton, metered and logged.
Continuous emissions monitoring runs on both sides of the contactor, so captured volumes are measurable rather than modeled after the fact.
Inlet & outlet CEMS
Continuous emissions monitoring on both the intake and treated exhaust, sampled in real time.
Mass-balance reconciliation
Captured tonnage is reconciled against fuel input and process stoichiometry, not just flow meters.
Third-party verification
Independent auditors review monitoring data ahead of any credit or offtake reporting.