Performance Assessment of CCGT Integrated with PTSA-Based CO 2 Capture: Effect of Sorbent Type and Operating Conditions

Recognizing the growing importance of natural gas as a transition fuel in Poland’s energy mix and the necessity of reducing CO 2 emissions, this article aims to assess the use of carbon capture and storage (CCS) technology to effectively reduce CO 2 emissions from combined cycle gas turbine (CCGT). The research employs the pressure–temperature swing adsorption (PTSA) to capture CO 2 from flue gases. Computer simulations, using IPSEpro (SimTech), are used to calculate the heat and mass balances for CCGT and PTSA units and assess their performance. In the first part of the research, the effect of sorbent type (Na-A and 5A) and flue gas share directed to the PTSA unit on the performance of the CCGT was investigated. Secondly, the parametric analysis regarding the adsorption and desorption pressures in the PTSA was carried out. The results showed that CO 2 emissions from CCGT can be reduced by 1.1 Mt (megatons) per year, but the use of PTSA was associated with a reduction in net electrical power and efficiency of the CCGT by up to 14.7% for Na-A and 11.1% for 5A sorbent. It was also found that the heat and electricity demand of the PTSA depends on the adsorption and desorption pressures.