Heimdal

Heimdal is a pioneer in direct air capture (DAC) carbon dioxide removal technology. The company has developed an innovative ocean-assisted carbon removal method that can permanently store CO2 while simultaneously reducing ocean acidification. Heimdal's process involves pumping seawater into a machine that uses electrolysis to rearrange water molecules and reduce acidity. This generates hydrogen, oxygen, and hydrochloric acid as byproducts, which can be stored and sold separately. The treated water is then returned to the ocean, where it helps capture more CO2.

In August 2024, Heimdal launched Bantam, its debut DAC facility, at the CapturePoint Oklahoma Carbon Hub in Osage and Kay Counties, Oklahoma. With a nameplate capacity of over 5,000 tons of CO2 capturable from the atmosphere annually, Bantam became the largest constructed DAC facility in the US and the second largest in the world at the time. Heimdal's technology utilizes well-established, off-the-shelf components and a novel sorbent formulation based on naturally abundant limestone, which has enabled faster development and lower construction costs compared to other DAC technologies.

Heimdal initially focused on producing carbon-neutral building materials but has since shifted its business model to exclusively sell permanent CO2 removal. The company is committed to rapidly scaling its operations, aiming to capture more than 1,000,000 tons of CO2 annually before 2030. Heimdal's approach offers advantages over traditional air capture methods, as ocean water contains a higher concentration of CO2 than air, allowing for more efficient capture in a smaller volume and requiring less energy and land area.