Physical Sciences Incorporated (PSI) and United Technologies Research Center (UTRC) propose to develop, characterize, and evaluate the performance of innovative nanocatalysts that are homogeneously dispersed (0.01 % - 0.1 % by wt.) within a synthetic endothermic hydrocarbon fuel for ramjet, scramjet, and Rocket-Based Combined-Cycle (RBCC) applications. Coke build-up will be significantly reduced since the catalyst will be expelled with the product gases and liquids from the cracking system into the combustion zone. Increased cracking efficiencies will result using the nanocatalyst due to the higher surface area/volume and dramatically enhanced settling times compared to conventional microcatalysts. As a result, higher heat sinks due to endothermic cracking will be obtained. The reaction product distribution and efficiencies of the nanocatalytic hydrocarbon cracking reaction will be measured using standard chromatography methods. Use of the alternative synthetic fuel is advantageous due to its low sulfur content, high thermal stability, high endotherm, and production through a non-petroleum based reaction. In Phase II, new nanocatalysts will be synthesized, characterized, and tested. Catalytic efficiency will be optimized. The implications of the nanocatalyst on combustion performance will be evaluated. This program comprises TRLs 1 through 3 within Phase 1.