Hi all,
I recently read an article regarding the capital investment that Brimstone Energy raised to support the development of their ‘carbon negative’ cement. Link to the article:
Having a look through the information I can find online, they grind up calcium silicate from rocks and extract lime (calcium oxide) using a leaching agent to form OPC. They consider it ‘carbon negative’ as magnesium is a byproduct of the production that can be reacted with carbon dioxide to form magnesium carbonate.
It seems like quite a simple process so I am trying to understand the potential drawbacks. Does anyone have any additional information regarding this method of producing OPC? Is the calcium silicate they require globally abundant in the purity required?
All the best,
Jack Scarr