![]() To catalyze the hydrocarbon cracking reactions, two zeolites, the zeolites Y and ZSM-5, are selected. Thermal and catalytic cracking of hydrocarbons under these conditions are mainly unknown. In the cooling system, the fuel is under high pressure and temperature, corresponding to supercritical conditions. The idea is to use a hydrocarbonated liquid fuel, called “endothermic fuel.” The heat is absorbed by fuel circulation behind a double wall, where the fuel undergoes thermal or catalytic cracking (endothermic reactions). Above Mach 6, the heat fluxes to be evacuated are so high that a cooling system adapted to hypersonic speed becomes indispensable. ![]() ![]() For an airbreathing vehicle, the generated heat fluxes increase with the flight velocity.
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