Abstract

Efficient repurposing of existing oil and gas infrastructure for Carbon Capture, Utilisation, and Storage (CCUS) and hydrogen applications necessitates careful consideration of challenges, including potential inaccuracies in flow measurement and heightened risks of corrosion and rock dissolution leading to gas leakage. These challenges are largely rooted in the inherent thermodynamic properties of CCUS and hydrogen systems. Hence, a foundational requirement is a comprehensive understanding of the theoretical and thermodynamic principles governing the entire CCUS process and hydrogen economy. Addressing these challenges requires the development of a robust model capable of accurately predicting properties in H2 and CO2 -rich streams. Precise determination of critical parameters, including density, speed of sound, and phase boundaries, is essential for accurate flow measurement. This approach seeks to establish safer CO2 and hydrogen transportation and storage processes by proactively avoiding conditions contributing to corrosion and reservoir rock dissolution challenges. An informed and thorough grasp of thermodynamic aspects, coupled with the creation of an appropriate prediction model, will play a critical role in ensuring the success and sustainability of CCUS and hydrogen implementations.