Research Triangle Institute (RTI) will develop novel third-generation fluidizable solid sorbents for their sorbent-based carbon dioxide (CO₂) capture process. Two novel sorbent approaches, based on hybrid-metal organic frameworks (MOFs) and hybrid-phosphorus (P)-dendrimers, have been identified with promise to achieve DOE’s performance and cost goals. The primary project goal is to design and synthesize several novel hybrid-based MOF and P-dendrimers with enhanced stability and higher CO₂ capacity, then thoroughly evaluate and show their potential to further drive down the cost of CO₂ capture. From this group, the most cost-effective sorbent that can meet DOE’s goals will be selected. RTI researchers will conduct lab-scale testing in RTI's packed-bed reactor and fluidized, moving-bed reactor with simulated flue gas; evaluate the sorbents’ stability and the impact of contaminants, temperature, and humidity; and complete high-level technical and economic analyses to understand the potential of these sorbents to substantially reduce the cost associated with CO₂ capture from coal-fired power plants. The project is designed to explore the promise of novel solid CO₂ sorbents to further lower the cost of CO₂ capture, establish an understanding of how process elements influence CO₂ capture performance, and provide information for a technology feasibility study, which will prove the commercial potential of a hybrid solid sorbent-based CO₂ capture technology.