Researchers developed an electrochemical process that converts limestone and silica into calcium silicate hydrate at 60 °C and 1 bar, enabling belite-rich cement clinker to form at 650 °C rather than the conventional 1200 °C. Using waste cement as the calcium feedstock, the modeled process could reduce production-stage CO2 emissions to 20 kg per ton of cement, a 98% reduction compared with conventional cement production.
