CCS vs Direct Air Capture (DAC): Cost, Efficiency & Deployment Compared
Last updated: 2026-02-28
Carbon capture technologies are essential for reaching net-zero emissions, but two fundamentally different approaches exist: point-source CCS captures CO₂ from industrial flue gases (power plants, cement, steel), while direct air capture (DAC) extracts CO₂ directly from ambient air at ~420 ppm concentration.
Global CCS capacity reached approximately 50 MtCO₂/year across 40+ operational facilities by 2025. DAC capacity, by contrast, is under 0.1 MtCO₂/year but is scaling rapidly with projects like Climeworks' Mammoth plant and 1PointFive's Stratos facility in Texas.
Both technologies are needed in IPCC scenarios for 1.5°C, but they serve different roles and face different economic realities.
| Metric | Point-Source CCS | Direct Air Capture (DAC) | Notes |
|---|---|---|---|
| Cost per Tonne CO₂ | $40–120/tCO₂ | $400–1,000/tCO₂ (falling) | DAC costs declining 15–20% per doubling of capacity |
| CO₂ Concentration in Feed | 4–30% (flue gas) | 0.042% (ambient air) | Higher concentration = easier/cheaper capture |
| Energy Requirement | 0.5–1.5 GJ/tCO₂ | 5–10 GJ/tCO₂ | DAC requires 5–10× more energy per tonne |
| Location Flexibility | Co-located with emission source | Anywhere (near storage or energy) | DAC can be sited near best storage geology |
| Capture Rate | 85–95% of flue gas CO₂ | Not applicable (ambient) | CCS doesn't capture 100% of facility emissions |
| Carbon Removal vs Reduction | Emission reduction (avoidance) | True carbon removal (CDR) | Critical distinction for net-zero accounting |
| Operational Capacity (2025) | ~50 MtCO₂/year | <0.1 MtCO₂/year | CCS has 500× more operational capacity |
| IRA Support (§45Q) | $85/tCO₂ stored | $180/tCO₂ stored | DAC receives 2× higher tax credit |
| Technology Readiness | TRL 9 (commercial) | TRL 7–8 (early commercial) | CCS is decades more mature |
| Projected Cost (2035) | $30–80/tCO₂ | $150–300/tCO₂ | Both pathways show significant cost reduction potential |
Bottom Line
CCS is the pragmatic near-term solution for decarbonizing heavy industry and power generation where emissions are concentrated. DAC is essential for achieving net-negative emissions and addressing dispersed/historical emissions, but remains 5–10× more expensive. The optimal strategy deploys CCS now at industrial facilities while investing in DAC cost reduction for the long term. Both are needed — they are complements, not substitutes.
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