Between 50 to 60% of cement CO2 emissions derive from the process of heating or "calcination" of limestone, the chemical reaction that converts limestone (CaCO3) into lime (CaO) and CO2. These emissions are therefore unavoidable and a low-cost capture solution is essential. The patented LEILAC kiln design separates CO2 emissions arising during lime and cement production without significant energy penalty. The LEILAC kiln is being developed to use a variety of input fuels and is also easily electrified, enabling complete decarbonization of production by switching to renewable energy. LEILAC technology was successfully piloted at 25ktpa scale at HeidelbergCement's Lixhe Cement plant in Belgium and is being scaled up to 100kTpa scale in the "LEILAC-2" project for a HeidelbergCement plant in Hannover, Germany.