A macro-scale experimental study of sub- and super-critical CO2 flow behaviour in Victorian brown coal

Abstract

In deep coal seams carbon dioxide (CO2) exists in its super-critical state, which emphasizes the importance of studying super-critical CO2 flow behaviour in coal, especially for field applications, such as CO2 sequestration and enhanced coal bed methane recovery. Although there has been some research on the subject, the studies have been conducted on only certain types of coal (e.g., naturally fractured black coal) using small coal samples, which makes it difficult to verify the applicability of adsorption theories at a higher scale to estimate field CO2 storage capacity. The main objective of this study is therefore to determine the permeability behaviour of coal for sub-critical and super-..