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The inert and oxidative flash pyrolysis of High Density Poly-Ethylene (HDPE) is studied 6 up to 20 000 K.s

Hydrocarbon pyrolysis has been widely studied since the 1900's for applications in aerospace as a fuel and/or coolant or for use with fuel cells and hydrogen production with a catalyst. In this context, the role of heterogeneous reactions with homogeneous phase chemistry is unclear despite the fact that it is obviously at the heart of coupled physico-chemical phenomena. In addition, the thermal formation of solid carbon particles-coke, which can be deposited on the structure, impacts the heterogeneous reactions. The aim of this work is to review the available literature on hydrocarbon pyrolysis involving reactions with solid surfaces and coke particles. The influent parameters such as the nature of the fluid, the temperature (up to 2000 K), the pressure (up to 100 bars), the residence time (µs order to min order), the reactor type (plug flow, batch, perfectly stirred reactor) and the type of catalyst (inert, metallic or more complex such as zeolites) are discussed. Then, a link between catalicity and coke production is addressed. This literature survey focuses in particular on methane because of the growing interest regarding the potential for hypersonic applications.

Regenerative cooling is a hot topic as it contributes to energy saving and energy conversion, for