Using geochemistry to catalyse the removal of atmospheric carbon dioxide

Permanent carbon storage

Robust carbon credits

Circularity is the cornerstone of Silicate’s process.

We take material that is surplus to requirements from the construction sector and turn it into a carbon removal vehicle.

Once applied, carbon is permanently removed from the atmosphere. The sequestered carbon is then verified, and geosphere-based carbon removal credits are generated.

The next green revolution

Frequently asked questions

What does Silicate do?

Silicate uses the silicate-carbonate cycle to remove carbon dioxide from the atmosphere. We process surplus concrete and turn it into a climate solution by spreading it on fields. Our material can lead to carbon being removed from the atmosphere for >100,000 years, and also boosts soil pH and combats ocean acidification.

I am a landowner, and I want to increase my soil carbon to create my own carbon credits. Is there a clash?

Our material uses soil as a medium, but the carbon is actually stored in groundwater and ultimately in the ocean. Meaning that you can still create carbon credits from your soil while partnering with Silicate.

How does the material enable carbon sequestration?

Our process uses the silicate-carbonate cycle to enable carbon mineralisation – i.e., we take the C from CO2 and lock it permanently away as bicarbonate (HCO3-).

Does Silicate’s material have any negative impacts on the environment?

Unlike mafic and ultramafic rocks, our material does not contain any harmful heavy metals, so it is perfectly safe to apply to agricultural land.

Is Silicate’s process the same as direct air capture?

We are indirectly capturing carbon dioxide from the air, via the soil, through a series of carbonation reactions. Unlike direct air capture solutions, Silicate’s carbon removal process does not require renewable energy or an additional geological storage area to achieve its optimum carbon-removal potential.

Are Silicate’s carbon removal credits sustainable?

We are completely science focused, with high integrity, verifiable carbon removal our mission. Everything we do is optimised to have the biggest positive impact.

Are carbon credits and carbon offsets the same thing?

Pretty much. A carbon credit is what we sell, and once it is used by a company to offset its emissions it becomes an offset. Equally, some companies are purchasing carbon removal credits in order to make a climate contribution – i.e., to spur on frontier carbon removal as opposed to offseting their greenhouse gas emissions.

What are carbon removal credits?

The distinction between carbon removal credits and carbon credits is that carbon removal credits actively remove carbon dioxide from the air, while carbon credits tend to avoid the emission of carbon dioxide into the air by protecting standing forest, for example. The IPCC has said that to meet 1.5°C, we will need to remove 100-1000 gigatonnes of carbon dioxide from the atmosphere by 2100, meaning that carbon removal credits will be a vital tool in meeting our climate goals.

Are Silicate’s carbon removal credits applicable for the EU ETS or other cap and trade schemes?

Our carbon removal credits are currently sold in the voluntary carbon market, not in any compliance markets. This could change, however, as carbon trading becomes more developed and includes carbon removal credits.