The use of carbonCarbon capture technology in primary aluminiumPrimary aluminium smeltingAluminium smelting is recognized as an important tool to combat Scope 1 emissionsScope 1 emissions from aluminium productionAluminium production. The introduction of CO2 captureCO2 capture technology in primary aluminiumPrimary aluminium smeltingAluminium smelting should have a focus on the integration in potline operations and on the type of technology used to capture the CO2. A challenge that often is a topic of discussion is that the concentration of CO2 is only 1 volume percent while in other industrial applications of CO2 captureCO2 capture the concentrations are (much) higher. In this paper we address the challenge of working with low CO2 concentrations and why it is also very difficult to raise them. Regarding the CO2 captureCO2 capture technology, the focus of the paper is on the amine solvent-based process to absorb CO2 from ventilation gases. Other options are shown but this process route has a relatively high TRL level and can be scaled up in a short time to commercial levels if so required. SimulationsSimulation have been performed to investigate the expected process parameters and the results and several observationsDecarbonization are presentedCarbon Capture and Storage (CCS in this paper.