Direct air capture (DAC) specialist Heirloom has unveiled plans to bring two new DAC plants onstream at the Port of Caddo-Bossier in Shreveport, Louisiana, to capture nearly 320,000 tonnes of carbon dioxide (CO2) annually.
The US business said it will start construction on the first site later this year and hopes it will be operational in 2026. The first facility will be responsible for the removal of around 170,000 tonnes of CO2 a year.
Heirloom’s second site will be part of Project Cypress, the Regional DAC Hub in Louisiana managed by the US Department of Energy (DOE)’s Office of Clean Energy Demonstrations (OCED) and will remove approximately 300,000 tonnes of CO2 per year.
The first phase of the project, which is expected to be operational in 2027, will be capable of removing 100,000 tonnes of CO2 per year. The site is eligible for up to $600m in funding.
Both Heirloom facilities will be fully powered by additional renewable energy sources.
The Heirloom method is based on limestone to capture CO2 directly from the air. The process starts with natural limestone, nearly 50% of which is CO2. By extracting this CO2 from the limestone and adding water – the Heirloom process creates a material that is thirsty for CO2 so it can return to a natural limestone state.
This material acts like a sponge – pulling CO2 from the atmosphere. The technology accelerates the process, reducing the time it takes to absorb CO2 in nature from years to three days.
Once the CO2 is absorbed, it is extracted from the limestone material using a renewable energy-powered kiln and stored permanently underground.
Shashank Samala, CEO of Heirloom, said the team couldn’t be more excited.
He added, “These investments not only bring meaningful economic activity and job creation to the region, but also help to cement Louisiana as a leader in this new energy economy and further the US’ leadership on the global stage.”
Looking beyond the plants, Heirloom is partnering with CapturePoint, a carbon management company, to store the CO2 captured from these facilities in Class VI underground wells. The pipeline and storage wells used for Heirloom’s captured CO2 will be dedicated to permanent CO2 storage.
Other projects
In November 2023, Heirloom launched what it says is the US’s first commercial-scale DAC facility, capable of capturing up to 1,000 tonnes of CO2 per year, in Tracy, California.
Fully powered by renewable energy, the plant will capture atmospheric CO2 and permanently sequester it in concrete through a partnership with CarbonCure Technologies.
Read more: Heirloom launches ‘US’ first’ DAC facility in California
The company has also signed deals to provide carbon removal to Microsoft, Stripe, Meta, Shopify, JPMorgan, McKinsey, Workday, H&M, Autodesk, and others.
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