Adsorbents are solids that have the capacity to capture CO2 on their surface and can be reused in a cyclical process. In these trials, the CO2 is released from the adsorption material by reducing the pressure. This is known as Pressure Swing Adsorption (PSA). These adsorbents are to be tested at about 250°C, higher feed gas temperatures than the other technologies . This may lower the capture cost by reducing the need to cool the gas for capture and then reheat it for entry into the gas turbine in a power plant.
The trial aims to:
- Identify and test suitable adsorbents and process conditions over a range of temperature and pressure conditions.
- Investigate the performance of adsorbents at higher temperatures.
Multi-layer adsorption beds
Some adsorbents are good at removing CO2 but cannot tolerate water. Also, an adsorbent can be used to remove SOx and NOx. A multi-layered adsorption column can provide staged separation of five gas components.
