We have studied laser ignition (1064 nm, 120 μs) of mixtures of lignite coal (brown coal) particles of size ≤0.1 mm and pentaerythritol tetranitrate (PETN) additives. We established that as the amount of PTEN additives increases in the range 0–50 wt.%, the critical ignition energy density of the mixtures decreases monotonically from 2.9 to 2.0 J/cm2. We used spectral pyrometry to determine that the flame temperature for the mixture increases from 1800 K to 2100 K.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 87, No. 1, pp. 50–55, January–February, 2020.
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Aduev, B.P., Nurmukhametov, D.R., Kraft, Y.V. et al. Laser Ignition and Flame Temperature for Low-Density Mixtures of Lignite Coal and Pentaerythritol Tetranitrate (Petn). J Appl Spectrosc 87, 41–45 (2020). https://doi.org/10.1007/s10812-020-00960-0
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DOI: https://doi.org/10.1007/s10812-020-00960-0