CCS and Power Systems
Carbon Storage - Carbon Use and Reuse
Utilization of CO2 in High Performance Building and Infrastructure Products
Project No: FE0004222
Solidia Technologies, Inc. (Solidia) is working to create an energy-efficient, CO2-consuming inorganic binder (based on a patented Wollastonite-like material know as Solidia CementTM (SC) that will act as a suitable substitute for Portland Cement (PC) in concrete. The process developed by Solidia enriches CO2 in a concrete admixture and utilizes a binding phase based on carbonation chemistry (Figure 1). Preliminary analysis suggests that producing SC in existing PC kilns could reduce kiln CO2 emissions by as much as 30 percent. Since SC can be produced at a lower kiln temperature, energy consumption could also be reduced, possibly by as much as 30 percent. Carbon dioxide emissions could be reduced further from curing Solidia cement with captured CO2 from the kiln. In sum, SC has the potential to reduce the CO2 intensity of PC production (tons of CO2 per ton PC) by as much as 70 percent.
The project involves investigating the relationship of the carbonation reaction rate and yield on temperature, pressure, and particle size. The particle size developed as part of the cement process is controlled by the carbonation rate and a newly developed milling method. Various types and compositions of minerals and aggregates are being evaluated across these parameters.