DAC and Storage

DAC and Storage

The concentration of carbon dioxide in the atmosphere has been rising steeply in the past sixty years. Capture6’s innovative direct air capture (DAC) solution offers net-negative technology that can remove historical emissions from the atmosphere to restore balance.

Monthly Carbon Dioxide Concentration Graph

Direct Air Capture

Direct air capture (DAC) is a set of engineering techniques that accelerate what trees and plants do in nature – capture carbon dioxide from the atmosphere to sequester carbon. The heart of every Carbon Dioxide Removal (CDR) technique is the chemistry of acid and bases. Capture6’s DAC process is designed for both flexibility while maximizing CO₂ removal through multiple capture pathways.


CO₂ is weakly acidic, and it represents only a tiny fraction – 0.04% – of the atmosphere. We produce our own absorbent for CO capture, sodium hydroxide, which is a strong base that quickly and effectively bonds with CO even at low concentrations. The process does not rely on energy intensive processes such as calcination at high temperatures or compression of CO.

Maximum efficiency for less than $100 USD/tonne

Our process can be deployed for capturing CO from ambient air and point sources such as flue gas.  Maximizing these multiple capture pathways enable us to drive down the cost of carbon removal. We are able to adapt the core technology to take advantage of various local site conditions, with the flexibility to utilize a wide variety of input sources including seawater, desalination waste streams, saline lakes and aquifers, geothermal brine, artificial brine, and recycled brine.

Carbon Storage

Capture6 is mitigating environmental and social risks associated with capturing carbon dioxide from ambient air and storing it in a mineralized form.


Mineralization is a clear winner when it comes to DAC storage.

Mineral carbonates such as - calcium carbonate (CaCO₃), sodium carbonate (Na₂CO₃) - minimize impacts on the local ecosystems by reducing the risk of leakage and permanently sequestering carbon dioxide for thousands of years.

Because the carbon is sequestered in mineralized form, and not CO₂, gaseous leakage from sequestration facilities or from potential reuse in enhanced oil recovery is not a concern.

Geological CO₂ storage poses various risks to human health and livelihoods, including seismic disruptions, acidification and contamination of aquifers, unexpected migration of the CO₂ plume, rupture of brittle and fractured caprock, and other pathways for CO₂ to return to the surface.

Carbon Mineralization Inforgraphic

Mineralization dials back time, enabling nature and natural resources to bounce back and thrive. Mineralized reserves provide future generations with rich natural resources that can be preserved or used in the future, if needed.

Cream colour stones in a big pile

Minerals are formed naturally and have demonstrated their ability to store carbon dioxide for thousands of years.

Mineral carbonates can be stored on land (by repurposing areas such as abandoned mines) or in water with proper approvals and necessary impact studies.

Mineralizing CO₂ simplifies sequestration and makes it cost-effective as the CO₂ does not need to be subjected to high pressure and temperature to maintain a supercritical fluid state, with lower risk of re-emission and/or release.

Why Capture6

Our CDR solution is not about us, it’s about future generations. The decisions we make today are the building blocks of our future.

Our Approach

Our DAC is one of the world’s leading solutions for permanent and irreversible carbon dioxide removal.


Are you interested in our services? Get in touch with our team and we’ll get back to you as soon as we can.