Correlation between homogeneous propane pyrolysis and pyrocarbon deposition

Cédric Descamps (1, 2) , Gerard L. Vignoles (1) , Olivier Féron (1) , Francis Langlais (1) , Jerôme Lavenac (1)

1 LCTS - Laboratoire des Composites Thermostructuraux
2 SPS - Snecma Propulsion Solide

Pyrocarbon deposition through propane pyrolysis is studied in a 1-D hot-wall CVD furnace. The gas-phase pyrolysis is modelled with a partially reduced kinetic mechanism leading to polycyclic aromatic compounds (PAHs). The C2-C4 and C3 reaction paths are in competition for benzene formation. There is also an independent C3-C5 path leading to naphthalene. The gas-phase concentrations are correlated with experimental data including in-situ FTIR spectra intensities, pyro- carbon deposition rates, and pyrocarbon nanotextures. Rough Laminar pyrocarbon deposition appears to be more related to PAHs than Smooth Laminar pyrocarbon.

Domaines: Matériaux; Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Cédric Descamps, Gerard L. Vignoles, Olivier Féron, Francis Langlais, Jerôme Lavenac. Correlation between homogeneous propane pyrolysis and pyrocarbon deposition. Journal of The Electrochemical Society, 2001, 148, pp.C695-C708. ⟨10.1149/1.1402981⟩. ⟨hal-00337417⟩