Innovation 2

Piloting of recarbonation of demolition concrete fines

Compressed, Concrete Gray Wall

Piloting of recarbonation of demolition concrete fines

An innovative, continuous two-step mineral carbonation process, that is currently being developed at TRL5 by NEU will in ACCSESS be brought to TRL7.

The process will be demonstrated at a construction site in Bern, CH and a main feature is that it can make use of captured CO2 for recarbonating waste material from demolished concrete. The resulting product can replace sand and other raw materials as filling material in new concrete products, thus making useful material from is the world’s largest waste stream. This not only enables permanent storage of CO2 in novel constructions, but provided that the CO2 has a provenance from biogenic sources, it also gives an option for carbon dioxide removal on a smaller scale than storage e.g. under the North Sea.
The concept for the NEU technology for concrete recarbonation
NEU has in addition to developing its recarbonation technology also developed a system for Carbon Dioxide Removal (CDR) certificates, and brings this knowledge, that is highly relevant to the ACCSESS activities and vision, into the ACCSESS consortium for sharing with the partners how these certificates can be included in business model development. The TRL7 pilot will use 220 kg CO2/hr to produce 500 kg CaCO3/h that can be used as filling material in concrete.

Innovation 1

Piloting of environmentally benign enzymatic solvent combined with an RPB absorber

Innovation 2

Piloting of recarbonation of demolition concrete fines

Innovation 3

Develoment of a radically new cement kiln integrated with amine capture