Phase Equilibria of Carbon Dioxide Capture from Binary Gas Mixtures (Flue and Biogas) using Semi-Clathrate Hydrates

To mitigate climate change, it is important to capture carbon dioxide. This thesis examines the capture of CO2 from gas mixtures using semi-clathrate hydrate (SCH) formation. It identifies SCH, which are stable at mild temperature and pressure conditions favourable to industrial processes, and explores the separation of gases in flue and biogas. It investigates capture primarily by entrapment in the hydrogen bonded water cages of the SCH structures but also via synergistic chemical reaction with hydroxide ions. It demonstrates that CO2 can be readily separated by SCH formation and a low energy regeneration process may be possible.