We track the progress of a carbon removal project through our certification framework. This roadmap moves from a preliminary assessment of eligibility toward full certification under the Puro Standard.
The facility has successfully completed the preliminary assessment conducted by the Puro team, meeting the minimum criteria for listing as a future supplier on Puro.earth.
The facility has passed the third-party facility audit, verifying compliance with the methodology, as well as output audit, verifying the net volume of removed carbon. The facility has been issued CORCs and continues its removal operations, as well as monitoring and reporting to Puro.earth.
Development status
We monitor a facility’s maturity as it moves toward industrial-scale operations. This status identifies whether a project is in development, under construction, or actively removing carbon from the atmosphere.
The feasibility study is ongoing. The Supplier is still collecting data to prove the concept.
The front-end engineering and design are ready and methodology compliant. There is a clear plan to monitor and measure. The LCA is up to the needed quality level or subject to small improvements. The technology has been used before. There are commercial agreements with the relevant business partners of the facility.
The facility is fully funded and is being implemented. Relevant infrastructure is being built.
The facility is operating as a carbon removal facility.
information
More about Eion – Twinterstellar 3021
Eion’s Twinterstellar 3021 enhanced rock weathering (ERW) project has been developed to remove carbon dioxide from the atmosphere safely, permanently, and verifiably. In 2023, Eion and its partners sourced, transported, and spread ~15,000 tonnes of pulverized olivine on ~9,000 acres of agricultural lands (i.e., on pasture and row crops, specifically corn and soybean fields) in the state of Mississippi, with a few fields across the state line in Louisiana. The olivine was sourced from two quarries: the Twin Sisters Mountain in Washington State and a quarry located in Åheim, Norway. The project uses existing agricultural infrastructure, and our measurement techniques seamlessly integrate with standard agricultural practices, imposing no new burdens on our farm partners.
We accelerate the weathering cycle by pulverizing olivine (i.e., greater surface area = faster reaction), a silicate mineral with high carbon dioxide removal (CDR) potential and crystal structure that weathers rapidly. The pulverized olivine has a soil alkalizing value that is comparable to conventional ag lime, a common agricultural input that balances soil pH (helping to maintain healthy soil and agricultural productivity). Once the olivine has been applied, nature takes over. Rain and soil acidity enable the olivine to remove carbon dioxide from the atmosphere and ultimately transport it to the ocean.
The Twinterstellar 3021 carbon project fits within the scope of Puro’s Enhanced Rock Weathering Methodology; it meets all requirements and was designed, developed, and implemented adhering to a principle of conservativeness. Eion utilizes a direct measurement approach to quantify the atmospheric carbon dioxide that has been captured and sequestered through the soil-air-rock interface. The approach fundamentally draws upon the accumulation of semi-mobile tracers in the topsoil (i.e., nickel) and the simultaneous depletion of base cations as a clear proxy for alkalinity fluxes (i.e., magnesium) induced by weathering.
The project provides growers with a cheaper and more efficient soil conditioner to correct soil acidity. This ultimately benefits both the growers, via higher profitability for their farming operations, and environment, by removing atmospheric carbon. But for the carbon project, growers would not be using Eion’s CarbonLock (i.e., olivine feedstock) and, consequently, removing additional carbon.
Twinterstellar 3021 primarily benefits the local communities through two avenues: economic redevelopment and environmental co-benefits. The consequences of the American mode of agriculture have led to mining soils of vital nutrients, causing the loss of soil organic matter (the foundation of soil health) and reducing essential biodiversity, including that in soils. Applications of olivine, however, can improve nitrogen use efficiency (potentially reducing the need for this input) and increase soil biological activity (from changes in pH among others). And by fostering long-term economic impact, Eion aims to revitalize local communities and drive economic incentives to rural areas.
sdgs
Sustainable development goals
Only listed sustainable development goals (SDGs) have been assessed according to the Puro standard SDG Assessment Requirements and validated and verified by a VVB.
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