Photo from NTNU


Aqualung is developing a first of a kind non-pressurized gas separation membrane. Aqualung has assembled partnerships with leading global organizations that can optimize, advance and mass produce Aqualung’s product at significant scale and speed. Aqualung will continue to advance relationships to maintain its competitive advantage.

Aqualung uses coated membranes to passively separate different gas molecules, almost like a filter.  In the video below, you get an overview of the technology behind Aqualung’s revolutionary carbon capture membrane.

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Our technology

Low complexity and environmentally friendly – No toxic additives or absorbents used means significantly lower operating risk and lower maintenance costs over time. This also avoids the logistics and costs of sourcing highly specialised absorbents.

Highly efficient – A remarkably more efficient membrane compared to the current standard, is achieved through the use of specialised coatings, establishing Aqualung as a market leader for carbon capture performance.

Highly favourable energy balance – The Aqualung system saves substantial energy costs compared to other membrane or absorbent-based systems as it requires zero absorbents or associated regeneration energy.

Fully scalable – The modular “Lego technology” can cost-effectively capture carbon even at small scale (<100,000 TPA) and at low CO2 concentration. This unlocks whole new markets, representing 85% of CO2 -emitters.

Highly compact – With down to 5% of the footprint of an absorption column, the Aqualung system can fit into existing plants where space is at a premium, and without major modifications to the exhaust structure or existing plant.

Research partnership – Aqualung is honoured to have NTNU as its R&D partner. We continue to forge new partnerships with other research institutes to remain at the cutting edge of carbon capture technology.

Aqualung is equipped for the future

Aqualung has recently signed a joint development agreement with one of the world’s largest hollow fiber manufactures to accelerate our speed to market.  This partnership will provide Aqualung the capacity to deliver our product at commercial scale.

Alongside our strategic partners and investors, Aqualung looks to provide CO2 as a service to our customers starting at the fully installed Aqualung carbon capture unit all the way down to sequestration/utilization.


Sigma Roc has evaluated various carbon capture technologies to meet our ambitious decarbonization targets. The Aqualung technology is well suited to the lime industry due to the modularity, small footprint and cost. Aqualung has been a great collaboration partner for the Köping kiln pilot and scale-up project. We look forward to continuing to work with them as the technology matures.
Martin Bains
Group Industrial Director, SigmaRoc

Comparison of Aqualung membrane agains other carbon capture technologies

Technology Description Capacity Purity Energy demand EHS Support Chain Capture Costs Maturity
Liquid absorption CO2 contained in flue gases is selectively absorbed into liquid solvents and then released to prodce a high purity CO2 stream ¨
Solid absorption CO2 in flue gases is selectively adsorbed onto solid sorbents and then released to produce a high purity CO2 stream N/A N/A
Traditional membrane Flue gas is pressurized through a membrane that filters out non CO2 components to produce a high purity CO2 stream N/A N/A
Aqualung membrane Non-pressurized flue gas is fed and CO2 is actively transported across the membrane to produce a high purity stream N/A