CO2 emissions resulting from the manufacture of cement constitute about 3% of total global greenhouse gas (GHG) emissions.
MGM Innova has developed two of the methodologies used to achieve GHG by the cement industry today - AM0040 ver.11 and ACM0003 ver.52.
MGM Innova is currently developing ten emission reduction projects and providing consulting services for the Cement Industry in Latin America, Africa and Asia. These include the application of emission reduction practices such as:
- Energy efficiency improvements
- Fuel substitution
- Use of alternative materials for clinker manufacturing
- Use of alternative materials for blended cement manufacturing
- CO2 capture
MGM Innova provides customized comprehensive solutions for Cement clients worldwide which include:
- Alternative materials for clinker and cement production
- Use of biomass and other alternative fuels for thermodynamic solutions
- Identification of energy efficiency improvements and technical innovation such as: waste heat recovery and CO2 capture technologies
GHGs in the cement industry
Options available to the cement industry to obtain significant CO2 emission reductions include:
- Energy efficiency improvements
- Use of alternative raw materials for clinker production or blended cement manufacture (including waste from other activities)
- Replacement of fossil fuels by less carbon-intensive fuels
- Implementation of sustainable industrial production practices
Main CO2 emission sources
CO2 from raw material calcination
The calcination process involves the release of CO2 from carbonates during the pyro-processing of limestone (raw meal). Every tonne of clinker produced generates approximately 500 to 600 kg of CO2 that is released into the atmosphere.
CO2 from combustion of fuels
CO2 emissions occur due to the consumption of fossil fuels in the cement kiln. The intensity of these emissions depends on the quantity and type of fuel consumed during the clinker manufacturing process.
CO2 from electricity consumption
CO2 emissions result from the consumption of electricity during the production of limestone (raw meal) and clinker and in cement-related processes such as grinding, milling, separation, feeding and packaging.
Available CO2 abatement options
The following activities reduce CO2 emissions in cement production:
- Use of non-carbonated alternative materials to replace limestone in clinker manufacture.
- Use of alternative materials for clinker preparation that improve chemical clinker phase formation, thereby reducing kiln thermal energy consumption.
- Use of alternative fuels (including biomass) to replace conventional fossil fuels in the combustion process. Biomass products are considered climate-neutral because emissions can be compensated by re-growing the biomass in the short term.
- Increase in the percentage of additives i.e., reduction in the percentage of clinker used in the production of blended cement types. Additives include fly ash, ground granulated blast furnace slag and silica fume.
- Reduction in energy consumption -either heat or electricity- through energy efficiency measures.
- Implementation of "best practices" i.e., upgrade of preheated towers, retrofit of burners with multi-fuel feeding, use of roller mills and installation of high-efficiency grinding systems.
CO2 abatement benefits
- Reduction of CO2 emissions
- Improvement of environmental conditions
- Improvements in the cement manufacturing process
- Generation of additional income through the sale of emission reductions in the carbon market
- Contribution to sustainable development through technology transfer
- Vertical Roller Mill Project
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