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Dust explosion risk moderation for flocculent dusts


Amyotte, PR and Cloney, CT and Khan, FI and Ripley, RC, Dust explosion risk moderation for flocculent dusts, Journal of Loss Prevention in the Process Industries, 25, (5) pp. 862-869. ISSN 0950-4230 (2012) [Refereed Article]

DOI: doi:10.1016/j.jlp.2012.05.007


The research presented in this paper is focused on dust explosions of coarse and fine flocculent (or fibrous) samples of wood and polyethylene. Hybrid mixtures of fibrous polyethylene and admixed ethylene were also studied. Experimentation was conducted by following standardized test procedures and using standardized apparatus for determination of maximum explosion pressure, size-normalized maximum rate of pressure rise, minimum explosible concentration, minimum ignition energy, and minimum ignition temperature. A general trend was observed of enhanced explosion likelihood and consequence severity with a decrease in material diameter, as well as enhanced consequence severity with admixture of a flammable gas to the combustion atmosphere. The same phenomena are well-established for dusts composed of spherical particles; this highlights the importance of inherently safer design and the principle of moderation in avoiding the generation of fine sizes of flocculent dusts and hybrid mixtures of such materials with flammable gases. In addition to presenting experimental findings, the paper describes phenomenological modelling efforts for the flocculent polyethylene using four geometric equivalence models: radial equivalence, volumetric equivalence, surface area equivalence, and specific surface area equivalence. The surface area equivalence model was found to yield the best estimates of maximum rate of pressure rise for the flocculent polyethylene samples investigated experimentally. © 2012 Elsevier Ltd.

Item Details

Item Type:Refereed Article
Keywords:Dust explosion modelling; Dust explosions; Flocculent material; Hazard moderation; Hybrid mixtures; Inherent safety; Best estimates; Dust explosion; Equivalence models; Flammable gas; General trends; Hybrid mixtures; Inherent safety; Surface area
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Mineral Resources (Excl. Energy Resources)
Objective Group:Environmentally sustainable mineral resource activities
Objective Field:Environmentally sustainable mineral resource activities not elsewhere classified
UTAS Author:Khan, FI (Professor Faisal Khan)
ID Code:94526
Year Published:2012
Web of Science® Times Cited:28
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-09-11
Last Modified:2014-11-21

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