Explosibility of cork dust in methane/air mixtures

Pilão, Rosa; Ramalho, Elisa; Pinho, Carlos

doi:10.1016/j.jlp.2005.05.001

Cited by 63 publications

(30 citation statements)

References 12 publications

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“…This behaviour was related to the higher burning rate of the gas and also to the increase of the volatile content in the gaseous phase, for the same nominal dust concentration [30].…”

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 79%

“…This was attributed to the increase of the burning rate resulting from the new conditions of equilibrium for the kinetic reaction. Examples of such explosion behaviour can be found in Pilão et al [30]. In Fig.…”

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 81%

“…The increase of the dust concentration for a given amount of methane means that more combustible is necessary to inflame the system than predicted by the Le Chatelier's Law [30]. One explanation for the increase of the dust concentration, for a given amount of methane, evidenced by the Fig.…”

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 87%

“…Although being for long time, a limited field of interest and research studies, the characterization of the mechanisms of initiation, development and propagation of explosions in air and cork dust mixtures has been recently the subject of detailed work [18,23,26,30,32].…”

Section: Discussionmentioning

confidence: 99%

“…16 is caused by differences in the ignitability of the dust with various amounts of added methane. Another possibility is that a small amount of the dust is not effectively dispersed into the chamber, but instead is lost as a coating on the walls of the chamber [30], as is indicated by the lower combustion efficiency experimentally obtained (of the order of 67%) during the explosion of low dust concentrations, as seen in Fig. 9.…”

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 99%

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Overall characterization of cork dust explosion

Pilão¹,

Ramalho²,

Pinho

2006

Journal of Hazardous Materials

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“…This behaviour was related to the higher burning rate of the gas and also to the increase of the volatile content in the gaseous phase, for the same nominal dust concentration [30].…”

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 79%

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 81%

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Explosibility Of Cork Dust In Methane/airmentioning

confidence: 99%

See 3 more Smart Citations

Overall characterization of cork dust explosion

Pilão¹,

Ramalho²,

Pinho

2006

Journal of Hazardous Materials

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The effects of coal dust concentrations and particle sizes on the minimum auto‐ignition temperature of a coal dust cloud

2017

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Summary Flash fires and explosions in areas containing an enriched combustible dust atmosphere are a major safety concern in industrial processing. An experimental study was conducted to analyse the effects of atmospheric coal dust particle sizes and concentrations on the minimum auto‐ignition temperature (MAIT) of a dust cloud. Two different coal samples from Australian coal mines were used. The coal dust particles were prepared and sized in 3 ranges, of below 74 μm, 74 to 125 μm and 125 to 212 μm, by using a series of sieves and a sieve shaker. A humidifier was used to increase the moisture content of the particles to the required level. All the experiments were conducted in accordance with the ASTM E1491‐06 method in a calibrated Goldbert‐Greenwald furnace. The results from this study indicate that coal dust properties, such as the chemical nature (H/C), concentration, particle size (D50), and moisture content, impact on the MAIT. For coal dust concentrations less than 1000 g.m−3, the MAIT decreases with increasing coal dust concentrations. On the other hand, for low concentrations of 100 to 15 g.m−3, the MAIT becomes more reliable for particle size D50 rather than for volatile matters.

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Influence of liquid and vapourized solvents on explosibility of pharmaceutical excipient dusts

Hossain

Amyotte

Abuswer

et al. 2014

Process Safety Progress

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Hybrid mixtures of a combustible dust and flammable gas are found in many industrial processes. Such fuel systems are often encountered in the pharmaceutical industry when excipient (non-active ingredient) powders undergo transfer in either a dry or solvent prewetted state into an environment possibly containing a flammable gas.The research described in this paper simulated the conditions of the above scenarios with microcrystalline cellulose (MCC) and lactose as excipients, and methanol, ethanol and isopropanol as solvents. Standardized dust explosibility test equipment (Siwek 20-L explosion chamber, MIKE 3 apparatus and BAM oven) and ASTM test protocols were used to determine the following explosibility parameters: maximum explosion pressure (P max ), size-normalized maximum rate of pressure rise (K St ), minimum explosible concentration (MEC), minimum ignition energy (MIE), and minimum ignition temperature (MIT).Because the MIKE 3 apparatus and BAM oven are not closed systems, only baseline excipient-alone testing and excipient pre-wetted with solvent testing were possible for MIE and MIT determination. With the Siwek 20-L chamber (a closed system), it was feasible to conduct P max , K St and MEC testing for all three cases of the dust alone, prewetted with solvent, and with solvent admixed to the combustion atmosphere at 80 % of the lower flammability limit for each solvent prior to dust dispersal.The experimental results demonstrate the significant enhancements in explosion likelihood and explosion severity brought about by solvent admixture in either mode. The extent of solvent influence was found to be specific to the given excipient and method of solvent addition. Solvent burning velocity considerations help to account for some of the experimental observations but for others, a more rigorous evaluation of solvent and excipient physical property data is needed. GCPS 2013___________________________________________________________________

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Explosibility of cork dust in methane/air mixtures

Cited by 63 publications

References 12 publications

Overall characterization of cork dust explosion

Overall characterization of cork dust explosion

The effects of coal dust concentrations and particle sizes on the minimum auto‐ignition temperature of a coal dust cloud

Influence of liquid and vapourized solvents on explosibility of pharmaceutical excipient dusts

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