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Research Article

Time-resolved Mid-infrared Measurements of Hydrogen Peroxide in the Low-temperature Oxidation of Iso-octane in a Rapid Compression Machine

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Pages 2042-2058 | Received 13 Jun 2020, Accepted 22 Nov 2020, Published online: 17 Dec 2020
 

ABSTRACT

Time-resolved quantitative measurements of hydrogen peroxide (H2O2) in the low-temperature oxidation of iso-octane in a rapid compression machine have been performed using mid-infrared absorption spectroscopy. H2O2 was detected in the 8-μm region, wherein H2O2 has the strongest absorption band. Owing to the weak interference of the absorption of iso-octane and H2O in the 8-μm region, H2O and iso-octane were detected in the 1.4- and 3.5-μm region, respectively. The cross-sections of H2O2 and H2O were calculated using parameters in the HITRAN database, and the iso-octane cross-section was measured using a rapid compression machine in the temperature and pressure ranges of 417–700 K and 100–700 kPa, respectively. The time-resolved quantitative H2O2 profiles in the low-temperature oxidation of iso-octane at 0.77 MPa, 642 and 660 K, and an equivalence ratio of 1.0 were successfully obtained. The H2O and iso-octane profiles were also obtained using this measurement method; the simultaneous measurements of the quantitative time profiles of multi-species in the low-temperature oxidation of fuels are also novel. Under experimental conditions, H2O2 was formed during the low-temperature oxidation of iso-octane, and its concentration gradually increased between the end of the low-temperature oxidation and start of the high-temperature oxidation. The calculated H2O2 profiles obtained using the latest chemical kinetic model of iso-octane showed the same tendency as the experimental profiles.

Acknowledgments

The authors thank Mr. Hideaki Saitou and Mr. Yoshiaki Yamadaya for their help with the experiments. This study was partly supported by the Council for Science, Technology and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), “Innovative Combustion Technology” (Funding agency: JST), JSPS Grants-in-Aid for Scientific Research (18K03966).

Additional information

Funding

This work was supported by the Japan Society for the Promotion of Science [18K03966] and the Council for Science, Technology and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), “Innovative Combustion Technology” (Funding agency: JST).

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