Potential explosion hazard of carbonaceous nanoparticles: screening of allotropes

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• 作者：Leonid A. Turkevich^a ; ^{LLT0@cdc.gov" class="auth_mail" title="E-mail the corresponding author} ; Joseph Fernback^a ; Ashok G. Dastidar^b ; Paul Osterberg^b
• 关键词：Explosion hazard ; Dust ; Carbon ; Nanoparticle ; Nanomaterials
• 刊名：Combustion and Flame
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：167
• 期：Complete
• 页码：218-227
• 全文大小：1830 K

文摘

There is a concern that engineered carbon nanoparticles, when manufactured on an industrial scale, will pose an explosion hazard. Explosion testing has been performed on 20 codes of carbonaceous powders. These include several different codes of SWCNTs (single-walled carbon nanotubes), MWCNTs (multi-walled carbon nanotubes) and CNFs (carbon nanofibers), graphene, diamond, fullerene, as well as several different control carbon blacks and graphites. Explosion screening was performed in a 20 L explosion chamber (ASTM E1226 protocol), at a concentration of 500 g/m³, using a 5 kJ ignition source. Time traces of overpressure were recorded. Samples typically exhibited overpressures of 5–7 bar, and deflagration index K_St = V^1/3 (dP/dt)_max ∼ 10–80 bar m/s, which places these materials in European Dust Explosion Class St-1. There is minimal variation between these different materials. The explosive characteristics of these carbonaceous powders are uncorrelated with primary particle size (BET specific surface area).