Journal
COMBUSTION SCIENCE AND TECHNOLOGY
Volume 194, Issue 10, Pages 2042-2058Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00102202.2020.1855635
Keywords
Hydrogen peroxide; mid-infrared spectroscopy; rapid compression machine; low-temperature oxidation; iso-octane
Funding
- Japan Society for the Promotion of Science [18K03966]
- Council for Science, Technology and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), Innovative Combustion Technology (Funding agency: JST)
- Grants-in-Aid for Scientific Research [18K03966] Funding Source: KAKEN
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Time-resolved quantitative measurements of hydrogen peroxide (H2O2) in the low-temperature oxidation of iso-octane have been performed using mid-infrared absorption spectroscopy. H2O2, H2O, and iso-octane were detected in different regions, and their profiles were successfully obtained. This measurement method allows for simultaneous measurements of multiple species in the low-temperature oxidation of fuels.
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-mu m region, wherein H2O2 has the strongest absorption band. Owing to the weak interference of the absorption of iso-octane and H2O in the 8-mu m region, H2O and iso-octane were detected in the 1.4- and 3.5-mu m 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.
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