Oxidation of Ethylene and Propene in the Presence of CO 2 and H 2 O: Experimental and Detailed Kinetic Modeling Study

Tanh Le Cong (1) , Emma Bedjanian (1) , Philippe Dagaut (1)

1 ICARE - Institut de Combustion, Aérothermique, Réactivité et Environnement

Ethylene and propene are major products of the thermal cracking of heavy oil. Under flameless combustion, they are oxidized in presence of large amounts of CO2 and H2O, which may affect their kinetics of oxidation. New experimental results for the kinetic of oxidation in a jet-stirred reactor (JSR) of ethylene and propene in the presence of CO2 and H2O were obtained (1 atm, 950–1450 K). Sonic probe sampling with online FTIR analyses and offline GC-TCD/FID analyses allowed the measurement of concentration profiles for the reactants and products. A detailed kinetic reaction mechanism was used to model the experiments. Good agreement with the data was obtained. Reaction paths analyses showed the important reactions influencing the kinetic of oxidation of the present fuel mixtures. Water tends to inhibit the combustion of the fuels, whereas CO2 has a small accelerating effect upon the oxidation of ethylene in fuel-rich conditions.

Mots clés: Kinetic modeling; Ethylene; Jet-stirred reactor; Water; Carbon dioxide CO2; Oxidation -mechanism

Domaines: Chimie théorique et/ou physique; Milieux fluides et réactifs

Tanh Le Cong, Emma Bedjanian, Philippe Dagaut. Oxidation of Ethylene and Propene in the Presence of CO 2 and H 2 O: Experimental and Detailed Kinetic Modeling Study. Combustion Science and Technology, 2010, 182 (4-6), pp.333-349. ⟨10.1080/00102200903462433⟩. ⟨hal-02020261⟩