Process optimization study on single atom solutions for CO₂ capture and methanation based on experiment and simulation

This work proposes a novel single atom solution (SAS) for carbon capture and methanation. It investigates the performance of SAS in CO₂ capture and utilization process through experimental and simulation methods. Detailed calculations are conducted on the physical properties of the SAS, and the optimal ratio of SAS is selected for absorption and desorption experiments. Based on physical properties and experimental research, a process model for SAS capture and methanation is established by Aspen Plus. The results showed that the activation energy of the SAS desorption reaction became 55.5 kJ/mol, with a reduction of 30.8 % compared to 30 wt%MEA. The optimal reboiler heat load of the SAS desorption process was 2.24 GJ/t CO₂, with a decrease of 40.3 % compared to 30 wt% MEA. The CO₂ equivalent emission of the SAS capture and methanation process was −1.473 t CO₂/t-pro. The successful application of the SAS in CO₂ capture and utilization is of great significance for carbon neutrality.