Understanding the characteristics of near-field CO₂ leakage is critical for accurate prediction of diffusion patterns and effective safety assessment. While large-scale plume dispersion models over terrain are relatively well established, the study of near-field release (under rapid depressurisation) and its local behaviour (on thermodynamics, and heat & mass transfer) remains a significant knowledge gap, especially in the presence of impurities.
Current models commonly assume thermodynamic equilibrium using the Homogeneous Equilibrium Model (HEM), which underestimates the rate of phase change and fails to capture the transient nature of dry-ice formation (de-sublimation) and sublimation. This project aims to generate comprehensive experimental datasets; and formulate validated numerical models, enhancing the understanding of non-equilibrium CO2 release for real-world applications. One of the anticipated outcomes of this work is that it will enable Carbon dioxide Capture and Storage (CCS) and Carbon Dioxide Removal (CDR) projects to more easily meet regulatory and environmental requirements, including measurement length calculations as stipulated under AS2885.
Partners: The University of Melbourne, Curtin University, Wood Australia Pty Ltd, Victorian Government – Department of Jobs, Skills, Industry and Regions
Researchers: Dr Dominic Davis, Prof. Michael Brear, Dr Melissa Kozul, Assoc. Prof. Yi Yang, Dr Biao Sun, Prof. Vishnu Pareek, Dr Tejas Bhatelia
Duration: 2 years