As Carbon Capture and Storage (CCS) scales up, the integrity of CO₂ transport infrastructure becomes critical. This presentation explores the integrity risks posed by trace impurities in captured CO₂ streams — specifically water, sulfur dioxide, nitrogen oxide, oxygen, and hydrogen sulfide. Through experimental studies it will be demonstrate how these impurities can form corrosive aqueous phases and solids under both pipeline and ship transport conditions, even at concentrations below 10 ppmv. The findings highlight the vulnerability of carbon steel to acid-induced corrosion and underscore the importance of impurity specifications and material selection. The presentation will discuss practical mitigation strategies, including optimized impurity specifications and possible knock-out chemicals where key reactions could be inhibited or key components could be scavenged from the process. This work contributes to safer, more reliable CCS deployment by informing design standards and operational practices for CO₂ transport systems.
