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Description

Limenet is an Italian climate tech company revolutionizing carbon removal with its patented pH-equilibrated Ocean Alkalinization technology—a groundbreaking method that accelerates the natural oceanic carbon cycle to combat anthropogenic emissions. This innovative approach permanently stores CO₂ in seawater as equilibrated calcium bicarbonates, increasing ocean alkalinity and helping restore marine ecosystems affected by acidification.

Technology & Methodology

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Limenet’s process mirrors and amplifies the Earth’s natural geochemical cycles. The company captures CO₂ from the atmosphere or industrial sources, such as the Iren biogas plant in Reggio Emilia, and reacts it with calcium carbonate (lime) and seawater in a controlled reactor. This reaction produces an aqueous solution of calcium bicarbonates, which is then released into the ocean. The result is a stable, long-term carbon sink, capable of sequestering CO₂ for over 10,000 years, while simultaneously improving ocean chemistry.

Limenet’s industrial-scale pilot plant, operational since September 8, 2023, in Augusta, Sicily, is the world’s largest facility for ocean-based CO₂ storage. It currently processes 100 kg of CO₂ per hour, with an annual target of 800 metric tons, and aims to scale up to 100,000 metric tons per year by 2028.

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Environmental Impact & Co-Benefits

Beyond carbon sequestration, Limenet’s ocean alkalinity enhancement has profound environmental benefits, including:

• Mitigating ocean acidification, a major threat to marine life.

• Enhancing marine biodiversity, creating favorable conditions for coral reefs, seagrasses, and calcifying organisms.

• Boosting fisheries and coastal ecosystems by stabilizing ocean pH.

• Protecting marine food webs and pH-sensitive species like plankton and mollusks.

This initiative is especially significant in Augusta, Sicily, where the site’s history as the “quadrilatero della morte” (Quadrilateral of Death)—an area devastated by petrochemical pollution—is being transformed into a beacon of environmental restoration.

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Scientific Rigor & Digital Transparency

Limenet’s technology is backed by years of scientific research from leading institutions such as Politecnico di Milano and Università Milano-Bicocca. Their research group, Desarc Maresanus, has published over 10 scientific papers validating this approach. The company’s proprietary carbon removal methodology has been independently verified by RINA, one of the world’s oldest and most respected verification bodies.

To ensure full transparency, Limenet has developed a state-of-the-art digital monitoring, reporting, and verification (dMRV) system, leveraging blockchain technology. Real-time data on CO₂ sequestration is recorded and securely stored on the Polygon blockchain, eliminating the risk of double counting and ensuring public accountability.

Limenet’s carbon removal credits adhere to ISO 14064-2 standards and are natively issued on a public blockchain-based system via the Carbonmark Direct solution. 
 

Scaling Ocean-Based Carbon Removal

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As one of the few companies globally leveraging the ocean for CO₂ sequestration, Limenet is positioning itself as an industry leader. With a patented process, a commitment to scientific excellence, and digital transparency, Limenet is set to make a lasting impact in the fight against climate change.​

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The price per tonne for this project depends on the number of tonnes you are willing to retire. Please complete the form below, and our sales team will contact you shortly.