data for Geophysical Research paper: Fast CO2-transport into decane and volume increase near the critical CO2-point: Combined micro-CT and Pressure Decay experiments (2024) by Helmut Geistlinger and Bilal Zulfiqar

The injection of CO2 into geological formations for storage and for efficiency enhancement of oil production is considered a promising technology. Fundamental for technological applications is a scale-dependent process understanding of the pressure and temperature dependence of the essential physico-chemical properties, such as volume increase, miscibility, solubility, diffusion, and interfacial tension and their correlation with each other. To the best of our knowledge, this is the first comprehensive study of volume increase in the critical range of the CO2 decane system that combines micro-CT, pressure decay experiments and modeling.