Heirloom & CarbonCure to permanently store atmospheric CO2 in concrete

CarbonCure Technologies and Heirloom have signed an agreement through 2025 to permanently store atmospheric CO2 captured by Heirloom’s Direct Air Capture (DAC) technology in concrete using CarbonCure’s carbon mineralisation technologies. The agreement advances the DAC-to-concrete storage pathway that the two carbon removal companies successfully demonstrated earlier this year and provides an immediately available storage solution that will enable Heirloom to scale its technology in the coming years.

The agreement will see CarbonCure permanently store CO2 captured by Heirloom’s DAC facilities in proximate concrete plants. CarbonCure provides a proven, immediately-available and verifiable concrete storage solution as Heirloom prepares to launch its first commercial facility. In addition to this agreement, Heirloom and CarbonCure are also working together following notification of selection by the Department of Energy for a DAC Hub project in Illinois.

“The urgency of deploying and scaling removal technologies becomes more clear with each temperature record that is broken,” said Shashank Samala, CEO of Heirloom. “Working with CarbonCure opens an immediately-available, permanent storage pathway that will allow Heirloom to continue scaling our technology today. Being able to immediately move forward with real-world deployments that permanently sequester CO2 will be invaluable as we race to meet the urgency that climate change requires.”

“CarbonCure is very excited to collaborate with Heirloom, demonstrating the very near-term opportunity for carbon removal, not just this decade but over the next few months,” said Robert Niven, CEO of CarbonCure Technologies. “Ours is a climate solution that puts captured CO2 to good use, permanently storing it and using it to build greener homes, highways, high-rises and more.”

Heirloom uses limestone, an abundant, easy-to-source and inexpensive material, to pull CO2 from the air. Harnessing a cyclic process, the limestone is broken down into calcium oxide rock and CO2 gas using heat from a renewable-energy powered, electric kiln. The calcium-based material is spread onto vertically stacked trays where it acts like a sponge, pulling CO2 from the air before it is returned to the kiln and the process begins again. The captured CO2 gas is then permanently stored either safely underground or embedded in concrete.

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