Sea Health & Restoration


Stefano Cappello, CEO & Co-Founder
Giovanni Cappello, CTO & Co-Founder
Enrico Noseda, Strategic Advisor & Co-Founder

Ocean acidification caused by the accumulation of carbon dioxide (CO2) in the atmosphere is severely damaging marine ecosystems, compromising marine biota life and disrupting the ecological balance (SOURCE: IPCC, Special Report on the Ocean and Cryosphere in a Changing Climate, 2019).

Limenet has created an innovative and patented technology for the conversion of carbon dioxide into an aqueous solution of calcium bicarbonates, which ensures long-lasting and stable CO2 storage in the sea.

meet the startup

Limenet is a solution inspired by nature, capable of permanently storing carbon dioxide in seawater via calcium bicarbonate, thus contributing to climate neutrality. Limenet’s patented technology offers a stable and virtually infinite CO2 storage system, exploiting the geological carbon cycles. By preserving the natural pH of seawater, Limenet is able to effectively offset CO2 emissions that cannot be directly eliminated.


Limenet’s origin dates back to 2018, when one of the partners investigated the possibility of developing an industrial storage system for carbon dioxide. In 2023, this project took concrete form when the group decided to set up a company.

Their driving force lies in the common desire to take action against the damage caused by anthropogenic emissions in order to actively contribute to climate change mitigation. This commitment has led to the development of an innovative solution that effectively addresses two crucial problems: CO2 storage and ocean acidification.
Not only does this process store carbon dioxide, but by dissolving carbonate compounds in seawater, it increases its alkalinity, i.e. its buffering capacity to resist changes in acidity levels, which leads to benefits for marine biota.


Limenet aims to preserve the future of the oceans and the planet through three main objectives: the permanent storage of CO2 in the ocean by means of calcium bicarbonate, increasing the alkalinity of the oceans to combat acidification, and raising awareness about the importance of adopting solutions to tackle climate change.


As part of the acceleration programme, the start-up realised a feasibility study concerning the storage of 100K tonnes of carbon dioxide in an industrial environment, in collaboration with Duferco.

The path undertaken by the Limenet team turned out to be a high-level, all-round and well-structured experience, characterised by a strong commitment to teamwork and a deep understanding of how a startup works.
Limenet is now gearing up for further growth and development. Collaboration with academic institutions and ongoing research efforts are key elements for its future.