Orbital ATK, Inc., along with their partners, are continuing the development of a novel Inertial Carbon Dioxide Extraction System (ICES) for carbon dioxide (CO₂) capture from coal-fired power plants through lab- and bench-scale testing. The ICES converts vapor-phase CO₂ contained in flue gas to a solid (dry ice) using supersonic expansion followed by inertial separation. This method utilizes a unique aero-thermodynamic inertial separation device, in which flue gas is directed to a converging-diverging nozzle and expanded to supersonic velocities, resulting in the desublimation and separation of CO₂. Solid CO₂ particle growth methods will be tested at lab scale to obtain a condensed CO₂ particle size required to support efficient migration in the ICES turning duct. Computational fluid dynamics modeling for the capture duct and diffuser will be performed to evaluate configurations of the bench-scale unit, validate laboratory test results, and predict performance of the full-scale ICES unit. The capture duct will be tested at bench-scale while controlling CO₂ particle size to measure the capture efficiency of migrated particles. The diffuser will be tested to evaluate diffusion of CO₂-depleted flue gas to atmospheric pressure. A series of bench-scale tests will be conducted to validate the effectiveness of several particle growth strategies. An update to the techno-economic analysis will be completed.