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Dust release from aggregative cohesive powders subjected to vibration

Dust release from aggregative cohesive powders subjected to vibration

Salehi, Hamid, Lotrecchiano, Nicoletta, Barletta, Diego and Poletto, Massimo (2017) Dust release from aggregative cohesive powders subjected to vibration. Industrial and Engineering Chemistry Research, 56 (43). pp. 12326-12336. ISSN 0888-5885 (Print), 1520-5045 (Online) (doi:https://doi.org/10.1021/acs.iecr.7b02241)

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Abstract

Dust is released from a mechanically vibrated bed of cohesive powders aerated close to the minimum for fluidization. The materials tested were silica and potato starch. The effect of both vibration intensity and vibration frequency on dust formation are verified, and a model to account for these two variables has been developed. A dimensionless dust release parameter has been defined and calculated from the experimental results. This parameter is able to explain the role of the acceleration due to vibration and of cohesive interparticle forces, also accounting for the magnification effects of acceleration intensity close to resonance conditions. However, the same parameter is unable to fully account for changes in dust emission induced by fluidized bed bubbling promoted by vibration frequencies close to resonance. Without considering these effects, frequency determines a reduction of dust release that should be explained by introducing some effects other than those considered in our model.

Item Type: Article
Uncontrolled Keywords: dust formation, environmental & workplace protections, vibrated fluidized bed, aggregate formation
Subjects: Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Engineering Science
Last Modified: 14 Oct 2019 15:31
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/25499

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