High-pressure conditions make carbon dioxide condensation easier in a supersonic nozzle. Integrating a supersonic nozzle and separator with swirling flows enhances CO2 separation, with higher heterogeneous droplet concentrations further boosting efficiency and reducing energy consumption. This technology is particularly applicable to offshore natural gas processing, offering a more sustainable and cost-effective approach to carbon capture and storage.

One of the authors is affiliated with the University of Exeter, which has an interest in promoting sustainable technologies like CCUS. However, this is disclosed, and no direct funding from industry stakeholders is reported.

This study presents a novel and promising approach to CO2 capture and separation using supersonic flows, contributing to the development of CCUS technologies. The research employs a well-established computational model and validates it against existing experimental data. However, some limitations like simplified droplet modeling and lack of high-pressure experimental validation prevent a perfect score.