A Hawaii-based startup called Heimdal is developing a new “ocean-assisted” carbon removal method that can permanently store CO2 at the same time as reducing ocean acidification, a FastComapny report reveals. Find out more at Engineering
The company pumps saltwater into a machine that applies electricity to rearrange the molecules in the water and reduce the acidity.
The acid is removed in the form of hydrochloric acid, which can be stored and sold separately. The process also produces hydrogen and oxygen as byproducts, which can also be stored. The water, meanwhile, is returned to the ocean, where it will help to capture CO2.When the excess acidity is removed from the ocean, it shifts how CO2 exists back to how it was pre-Industrial Revolution," Erik Millar, co-CEO of Heimdal, explained to in an interview.
based on a similar concept to the one used by Heimdal. Their process converts CO2 in ocean water into a material similar to seashells, allowing it to be permanently stored. Similarly, the process was designed to enable the ocean to absorb more CO2 from the atmosphere. Heimdal has launched a solar-powered pilot plant using the infrastructure of an existing desalination plant that already has the capacity to pump a large amount of seawater. The company says its technology can currently capture CO2 at a cost of $475 per ton and the pilot plant can capture 36 tons of CO2 a year. Its next plant will be designed to capture 5,000 tons of CO2 per year and it will operate at a lower cost of $200 per ton.
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