Measurement of Ignition Energies and Explosion Limits for Organic Solvent Vapors, Featuring the TemperatureCharacteristics

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  • Yamaguma Mizuki
    Electrical Safety Research Division, National Institute of Occupational Safety and Health

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Other Title
  • <b>有機溶剤蒸気の着火エネルギーおよび</b><b>爆発範囲測定 </b>
  • 有機溶剤蒸気の着火エネルギーおよび爆発範囲測定--温度特性
  • ユウキ ヨウザイ ジョウキ ノ チャッカ エネルギー オヨビ バクハツ ハンイ ソクテイ オンド トクセイ
  • <b>─温度特性</b><b>─ </b>

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<p>The ignition energies and explosion limits for 15 solvent vapor／air mixtures were measured using a newly developed temperature─adjustable ignition test apparatus. For all the mixtures, the minimum ignition energies （MIEs） decreased exponentially, and the explosion limits expanded as the test temperature increased. The acetone vapor／air mixture, among others, depended strongly on the temperature─the MIE at 25 ℃ was less than one third that at 100 ℃. Empirical equations for estimating the upper and lower explosion limits by an electrostatic spark from those by a more energetic ac spark were derived. A mixture of acetone, water and air was effectively inactivated when the water concentration was 30 vol％ at 100 ℃.</p>

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