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Cement Emissions

According to the International Energy Agency, the cement sector is the third-largest industrial energy consumer and the second-largest industrial CO2 emitter. Carbon dioxide emitted during the cement production process represents the most important source of non-energy industrial process of global carbon dioxide emissions. 

Cement production accounts for around 7% of total global industrial energyuse and about 7% of global emissions. 

Carbon dioxide is a by-product of a chemical conversion process used in the production of clinker, a component of cement, in which limestone (CaCO3) is converted to lime (CaO).

Sources of greenhouse gas emissions in a typical cement plant

1) As the raw material is heated carbon dioxide is liberated due to the chemical conversion of limestone to calcium  oxide.

2) Burning fuels (such as coal, gas, diesel and alternative fuels) to create thermal energy for the process.

3) Indirect emissions from electricity use. Cement grinding is the largest single use of electricity in a cement plant. Raw meal grinding and moving material around a plant also requires electricity.