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DOI: 10.1016/j.fuproc.2008.07.004

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Fuel Processing Technology 89, 12 (2008) 1416-1428

Characterisation of coking activity during supercritical hydrocarbon pyrolysis

Nicolas Gascoin 1, 2, 3, Philippe Gillard 3, Marc Bouchez 4

(2008)

The active cooling of the Supersonic Combustion Ramjet engine, for hypersonic flight purpose, is ensured thanks to fuel, n-dodecane for the present study. The endothermic fuel pyrolysis, starting above 800 K, could generate an unwanted coke formation. Experimental tests up to 1125 K and between 1 MPa and 6 MPa have been performed on the hydrocarbon fuel pyrolysis to evaluate the coking activity. 316L stainless steel, low carbon steel and titanium reactors have been considered. A witness of the coke formation, based on its thermal insulation and pressure loss effects, has been found. A correlation between methane production and coke deposit was found. The coke has been studied with Scanning Electron Microscope (SEM), Energy Dispersion Spectroscopy (EDS), X-ray diffractometer and Fourier Transform Infrared (FTIR) spectroscopy. The porosity, the density and the permeability of the coke have been estimated. © 2008 Elsevier B.V. All rights reserved.

1:	Laboratoire Energétique Explosions Structures (LEES)
	Université d'Orléans
2:	Laboratoire Vision & Robotique (LVR)
	Université d'Orléans
3:	Laboratoire PRISME (PRISME)
	Université d'Orléans : EA4229 – ENSI Bourges
4:	MBDA (MBDA-F)
	EADS

Subject

:

Chemical Sciences/Analytical chemistry Chemical Sciences/Catalysis Engineering Sciences/Chemical and Process Engineering

Keyword(s): Carbon steel – Chemical reactions – Coke – Combustion – Electron energy loss spectroscopy – Fourier transform infrared spectroscopy – Fourier transforms – Hydrocarbons – Infrared spectroscopy – Methane – Organic compounds – Petroleum chemistry – Pyrolysis – Ramjet engines – Scanning electron microscopy – Steel – Thermal insulation – Thermogravimetric analysis – Titanium – 316l stainless steels – Active cooling – Catalytic effect – Characterisation – Coke deposits – Coke formations – Dodecane – Energy dispersions – Experimental tests – Fourier transform infrared – Fuel pyrolysises – Hydrocarbon fuels – Hydrocarbon pyrolysis – Hydrocarbon pyrolysises – Hypersonic flights – Low carbon steels – Methane productions – n-Dodecane – Pressure losses – Scanning electron microscopes – Supercritical – Supercritical state – Supersonic combustion ramjet engines – Stainless steel

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From: Nicolas Gascoin <>

Submitted on: Wednesday, 16 November 2011 19:05:51

Updated on: Thursday, 17 November 2011 10:15:45