| Summary: | This paper presents an assessment of the cost performance of CO<sub>2</sub> capture technologies when retrofitted to a cement plant: MEA-based absorption, oxyfuel, chilled ammonia-based absorption (Chilled Ammonia Process), membrane-assisted CO<sub>2</sub> liquefaction, and calcium looping. While the technical basis for this study is presented in Part 1 of this paper series, this work presents a comprehensive techno-economic analysis of these CO<sub>2</sub> capture technologies based on a capital and operating costs evaluation for retrofit in a cement plant. The cost of the cement plant product, clinker, is shown to increase with 49 to 92% compared to the cost of clinker without capture. The cost of CO<sub>2</sub> avoided is between 42 €/t<sub>CO2</sub> (for the oxyfuel-based capture process) and 84 €/t<sub>CO2</sub> (for the membrane-based assisted liquefaction capture process), while the reference MEA-based absorption capture technology has a cost of 80 €/t<sub>CO2</sub>. Notably, the cost figures depend strongly on factors such as steam source, electricity mix, electricity price, fuel price and plant-specific characteristics. Hence, this confirms the conclusion of the technical evaluation in Part 1 that for final selection of CO<sub>2</sub> capture technology at a specific plant, a plant-specific techno-economic evaluation should be performed, also considering more practical considerations.
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