Ignition and chemical kinetics of acrolein-oxygen-argon mixtures behind reflected shock waves

Abstract

In order to address increasing greenhouse gas emissions, the future fossil fuel shortage and increasingly stringent pollutant emission regulations, a variety of biofuels are being progressively incorporated into conventional transportation fuels. Despite the beneficial impact of biofuels on most regulated pollutants, their combustion induces the increase of a variety of aldehydes that are being considered for specific regulations due to their high toxicity. One of the most hazardous aldehyde compounds is acrolein, C_2H_3CHO. Despite its high toxicity and increased formation during bioalcohol and biodiesel combustion, no experimental data are available for acrolein combustion. In the present study, we have investigated the ignition of acrolein–oxygen–argon mixtures behind reflected shock wave using three simultaneous emission diagnostics monitoring OH∗, CH∗ and CO_2∗. Experiments were performed over a range of conditions: Φ = 0.5–2; T_5 = 1178–1602 K; and P_5 = 173–416 kPa. A tentative detailed reaction model, which includes sub-mechanisms for the three measured excited species, was developed to describe the high-temperature chemical kinetics of acrolein oxidation. Reasonable agreement was found between the model prediction and experimental data.

Additional Information

© 2014 Elsevier Ltd. Received 6 May 2014; Received in revised form 28 June 2014; Accepted 2 July 2014; Available online 21 July 2014. The present work was carried out in the Explosion Dynamics Laboratory and the Turbulent Flow Oriented Research in Combustion and Energy groups of the California Institute of Technology. Karl Chatelain is grateful to the "Conseil Régional du Centre" for sponsoring a student fellowship during his stay at Caltech.

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Accepted Version - AcroleinePreprint.pdf

Supplemental Material - 1-s2.0-S0016236114006449-mmc1.zip

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