In this Small Business Innovation Research (SBIR) project, InnoSepra LLC is developing a low-cost sorbent-based process for the capture of carbon dioxide (CO₂) from low concentration feed streams. The two-stage process is envisioned to use structured sorbents in a rotating wheel configuration for the adsorption and regeneration of CO₂, producing a stream with an enriched CO₂ concentration of 10 to 15 percent that is then delivered as feed to an existing CO₂ capture system for further purification. The first stage removes moisture through a rapid cycle adsorption process, while in the second stage CO₂ (1 to 1.5 percent concentration) is adsorbed and enriched through a reactive adsorption process. The process utilizes physical sorbent materials in structured monolithic form that exhibit a low heat of adsorption, high CO₂ capacity, and low pressure drop, resulting in a reduction in the parasitic power load compared with the state-of-the-art aqueous amine absorption process using monoethanolamine (MEA). In addition, the capital cost is reduced due to the ability to use offsite fabrication with less-expensive carbon steel materials. During Phase I, prototype adsorbents were evaluated at lab scale with feed gases containing low CO₂ concentrations. A preliminary techno-economic analysis estimated that these sorbents have the potential to reduce capital and CO₂ capture costs by more than 45 percent compared to MEA. In Phase II, test modules will be fabricated to evaluate structured sorbents for moisture removal and CO₂ adsorption capacity at semi bench-scale using synthetic flue gas containing low CO₂ concentrations. Test units will be modified to analyze both processes in a rotating bed configuration as well as a fixed bed configuration for comparison. An engineering design and a techno-economic analysis for a full-sized plant will be prepared.