Single droplets to particles - size, shape, shell thickness and porosity analyses using X-ray computed tomography
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Author (Corporation)
Publication date
14.12.2021
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Type
01A - Journal article
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Parent work
Chemical Engineering Science
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Volume
245
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Pages / Duration
116879
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Elsevier
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Abstract
The drying kinetics of single droplets of crystallizing and skin-forming species were investigated via acoustic levitation to provide a well-controlled environment mimicking spray drying operations. Particles manufactured by drying aqueous solution droplets containing varying ratios of D-mannitol and polyvinylpyrrolidone (PVP) were analysed using a range of techniques to elucidate their morphology and microstructure. Size, porosity and surface roughness of the manufactured particles increased with D-mannitol concentration in water, while the sphericity decreased, a consequence of the unique morphologies. The change in particle shell thickness was found to be minimal. Considering varying proportions of PVP led to a variety of fascinating structures, contrasting to those manufactured from pure D-mannitol. Temperature effects were further considered, and the results were matched by that from a lab and pilot scale spray dryer. Analysis of the solid form further demonstrates the opportunity to prepare different polymorphic forms of D-mannitol.
Keywords
Droplet drying, Particle morphologies, Particle microstructure, Shape Porosity, Shell thickness, X-ray computed tomography
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0009-2509
Language
English
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No
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Publication status
Published
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Peer review of the complete publication
Open access category
Green
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Citation
Abdullahi, H., Neoptolemou, P., Burcham, C. L., & Vetter, T. (2021). Single droplets to particles - size, shape, shell thickness and porosity analyses using X-ray computed tomography. Chemical Engineering Science, 245, 116879. https://doi.org/10.1016/j.ces.2021.116879