A mid-infrared absorption diagnostic for acetylene detection
K. C. Utsav, E. F. Nasir, A. Farooq
Applied Physics B, vol. 120, issue 2, pp. 223-232, (2015)
Acetylene is an important combustion intermediate and plays a critical
role in soot formation. Accurate measurements of trace concentrations of
acetylene can be very useful in validating hydrocarbon oxidation and
soot formation mechanisms. Strongest vibrational band of acetylene near
13.7 μm is probed here to develop a highly sensitive absorption
diagnostic. Experiments are carried out behind reflected shock waves to
measure absorption cross sections of acetylene near 730 cm−1
over a wide range of temperatures (1000–2200 K) and pressures (1–5 bar).
The diagnostic is demonstrated by measuring acetylene formation during
the shock-heated pyrolysis and oxidation of propene.
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