Abstract
Carbon Capture, Utilization and Storage (CCUS) is regarded as one of the most economical solutions to achieve reasonable emission reductions for small and medium-sized point sources in the IEA Clean Technology Scenario (CTS). In order to reduced dependency of fossil energy, the solar-assisted post-combustion CO2 capture system are proposed and studied in past decade. Nevertheless, the most of existing feasibility studies on solar-assisted CO2 capture system are steady-state analysis under certain fixed working conditions, which tend to ignore the impact of fluctuations in weather conditions and even lead to a misguiding on feasibility study. Hence, the dynamic simulation model is necessary as it could provide more detailed information and close to the actual situation. This study presents a design of a solar-assisted 5-step temperature-vacuum swing adsorption CO2 capture (SOL-TVSA) system for an industrial emission source. Verified by experiments of core unit, a dynamic simulation system is established and the influences of cyclic parameters on dynamic performance are evaluated. Results show that when vacuum pressure is lower than 6 kPa and desorption temperature exceeds 70 °C, the recovery rate and purity of TVSA system can exceed 95% and 85% respectively. When the volume-area ratio is below 0.3, the annual amount of CO2 captured by SOL-TVSA system could exceed 2.11 ton and solar fraction can exceed 38.81%. The maximum values of coefficient of performance and exergy efficiency can reach 2.20 and 9.81% respectively.
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