Materials and Techniques for High Temperature CO2 Capture (original) (raw)

A promising approach to meet future global energy needs while minimizing the carbon foot print is Integrated Gasification Combined Cycle(IGCC) with pre-combustion CO2 capture. The key challenge to use this technology is removing CO2 from syngas (H2+CO+CO2) before sending to turbine. Conventional solvent based absorption techniques need cooling of syngas to facilitate scrubbing process. This limitation results in significant energy penalty and reduced efficiency. Pressure Swing Adsorption (PSA) is a widely accepted technique for CO2 capture at elevated temperatures. PSA process is characterized by preferential adsorption of desired gas species on a porous adsorbent at high pressure and recovery of the same at lower pressure. However main issues of this technology are low recovery rate, development of suitable regenerable adsorbents for high temperature applications. Key factors that will decide the commercial worthiness of adsorbents are selectivity, stability, adsorption/desorption ...