Effect of particle morphology on dust minimum ignition energy Academic Article

abstract

• 2019 Elsevier B.V. Dust explosions are a threat to process industries. Studies have examined the effect of (particle size, chemical composition, and polydispersity) on dust explosion potential and severity; however the effect of particle morphology on dust explosions has largely been neglected. This work aims to show particle morphology has an important role in influencing dust minimum ignition energy (MIE). Two aluminum dust samples (spherical and irregular) with similar size distribution, polydispersity and chemical composition were examined in the Khner MIKE3 MIE apparatus. It was found that irregular shaped dust has lower MIE compared to spherical shaped dust. This is attributed to the higher specific surface area of irregular shaped dust, which affects the dust cloud dynamics (turbulence, cloud concentration) and leads to lower resistance to thermal conduction. This study highlights the importance of particle morphology in affecting dust explosion parameters and makes a case to include it in dust explosion risk assessment.

authors

• Mashuga, Chad

published proceedings

• Powder Technology

author list (cited authors)

• Bagaria, P., Prasad, S., Sun, J., Bellair, R., & Mashuga, C.

citation count

• 27

complete list of authors

• Bagaria, Pranav||Prasad, Shrey||Sun, Jingze||Bellair, Robert||Mashuga, Chad

publication date

• January 2019

publisher

• Elsevier  Publisher

published in

• Powder Technology  Journal

Digital Object Identifier (DOI)

• 10.1016/j.powtec.2019.07.020

start page

• 1

end page

• 6

volume

• 355

URL

• http://dx.doi.org/10.1016/j.powtec.2019.07.020