CO2 Permeability in HNBR: Insights for CO2 Transport Applications

Carbon capture, utilization, and storage is a crucial short-term strategy to mitigate climate change. Once captured, CO2 needs tobe transported to storage sites, and to ensure efficient transport, it is typically compressed into a liquid or supercritical fluid. Theseconditions can alter the properties of materials used during the transport stage. A HNBR, a commonly used elastomer in oil andgas applications, is investigated in this work in terms of its CO2 permeation properties. The plasticization effect of CO2 plays a keyrole, as it can shift the glass transition temperature, leading to peculiar permeability behavior at high-pressure. Thermodynamicmodelling is also effectively applied, describing the observed trends.