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Post Combustion CO2 Capture Using Absorption Technologies

Absorption techniques are discussed as end of the pipe measures for CO2 abatement. Overall, up to 95% of the CO2 can be captured with these techniques. After abatement the CO2 is purified to > 99% and compressed to > 74 bar for transport to designated storage sites. The chemical absorption with alkanolamines is a proven technique in other industry sectors like the chemical or gas processing industries. There, flue gas volumes and absorbent cycles are significantly smaller compared to the application in the cement clinker burning process. Consequently, alterations are necessary to make this concept suitable for cement industry.

Primarily due to their high costs, the solvents used for absorption need to be regnerated.  Regeneration is highly energy consuming and therefore adds a CO2 and cost penalty to this technology. 

Development Status Products
Cement, clinker

Post Combustion CO2 Capture Using Absorption TechnologiesCosts & Benefits

Parent Process: Carbon Capture and Storage
Energy Savings Potential

Thermal and electrical energy use increases by 1 - 3.5 MJ/t-clinker and by 50 to 90 kWh/t-clinker, respectively. 

CO2 Emission Reduction Potential

Up to 90% of the CO related to clinker production can be captured.  CO2 emissions linked to the absorption and regenertion steps will need to be taken into consideration. 

EU flag Reductions of 740 kg CO2/t-clinker are estimated. 


Investment costs are estimated to be €100 - 300 million in 2030 and € 80 - 250 million in 2050.  

Operational costs are estimated to be €10 - 50/t-clinker for 2030 and € 10 - 40/t-clinker for 2050.  

Post Combustion CO2 Capture Using Absorption Technologies Publications

Development of State of the Art Techniques in Cement Manufacturing: Trying to Look Ahead

The report represents the independent research efforts of the European Cement Research Academy (ECRA) to identify, describe and evaluate technologies which may contribute to increase energy efficiency and to reduce greenhouse gas emissions from global cement production today as well as in the medium and long-term future. 

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