The majority (about 60 %) of the CO2 emitted from a modern cement plant comes from the calcination of limestone. The remainder comes primarily from the fuel combustion required to drive the clinkering reactions in cement manufacture. Table 1 demonstrates a typical CO2 balance for a modern cement plant.
2 Traditional levers
There are three highly publicized, traditional levers for reducing CO2 from conventional cement manufacturing:
These have been widely explored and publicized in the media. Table 2 provides an insight into how some...