Oxidation of Ethylene and Propene in the Presence of CO₂ and H₂O: Experimental and Detailed Kinetic Modeling Study

Abstract

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.

Keywords:

• Carbon dioxide
• Ethylene
• Kinetics
• Propene
• Reaction mechanism
• Water

ACKNOWLEDGMENTS

This work was partly funded by CNRS and by ANR (ANR-06-CO2-010-01).

Additional information

Notes on contributors

Tanh Le Cong

Tanh Le Cong is presently at PetroVietnam, Research & Development Center for Petroleum Processing, 4 Nguyen Thong Street, 3 District, Ho Chi Minh City, Vietnam.