Nitric Oxide Circumstances in Nitrogen-Oxide Seeded Low-Temperature Powling-Burner Flames

M. Furutani; Y. Ohta; M. Nose

doi:10.18321/ectj569

Authors

M. Furutani Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
Y. Ohta Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
M. Nose Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

DOI:

https://doi.org/10.18321/ectj569

Abstract

Flat low-temperature two-stage flames were established on a Powling burner using rich diethyl-ether/ air or n-heptane/air mixtures, and nitrogen monoxide NO was added into the fuel-air mixtures with a concentration of 240 ppm. The temperature development and chemical-species histories, especially of
NO, nitrogen dioxide NO₂ and hydrogen cyanide HCN were examined associated with an emission-spectrum
measurement from the low-temperature flames. Nitrogen monoxide was consumed in the cool-flame
region, where NO was converted to the NO₂. The NO₂ generated, however, fell suddenly in the cool-flame
degenerate region, in which the HCN superseded. In the blue-flame region the NO came out again and
developed accompanied with remained HCN in the post blue-flame region. The NO seeding into the
mixture intensified the blue-flame luminescence probably due to the cyanide increase.

References

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