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Acoustophoretic focusing effects on particle synthesis and clogging in microreactors

The handling of solids in microreactors represents a challenging task. In this paper, we present an acoustophoretic microreactor developed to manage particles in flow and to control the material synthesis process. The reactor was designed as a layered resonator with an actuation frequency of 1.21 MH...

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Detalles Bibliográficos
Autores principales: Dong, Zhengya, Fernandez Rivas, David, Kuhn, Simon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336152/
https://www.ncbi.nlm.nih.gov/pubmed/30560264
http://dx.doi.org/10.1039/c8lc00675j
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author Dong, Zhengya
Fernandez Rivas, David
Kuhn, Simon
author_facet Dong, Zhengya
Fernandez Rivas, David
Kuhn, Simon
author_sort Dong, Zhengya
collection PubMed
description The handling of solids in microreactors represents a challenging task. In this paper, we present an acoustophoretic microreactor developed to manage particles in flow and to control the material synthesis process. The reactor was designed as a layered resonator with an actuation frequency of 1.21 MHz, in which a standing acoustic wave is generated in both the depth and width direction of the microchannel. The acoustophoretic force exerted by the standing wave on the particles focuses them to the channel center. A parametric study of the effect of flow rate, particle size and ultrasound conditions on the focusing efficiency was performed. Furthermore, the reactive precipitation of calcium carbonate and barium sulfate was chosen as a model system for material synthesis. The acoustophoretic focusing effect avoids solid deposition on the channel walls and thereby minimizes reactor fouling and thus prevents clogging. Both the average particle size and the span of the particle size distribution of the synthesized particles are reduced by applying high-frequency ultrasound. The developed reactor has the potential to control a wide range of material synthesis processes.
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spelling pubmed-63361522019-02-11 Acoustophoretic focusing effects on particle synthesis and clogging in microreactors Dong, Zhengya Fernandez Rivas, David Kuhn, Simon Lab Chip Chemistry The handling of solids in microreactors represents a challenging task. In this paper, we present an acoustophoretic microreactor developed to manage particles in flow and to control the material synthesis process. The reactor was designed as a layered resonator with an actuation frequency of 1.21 MHz, in which a standing acoustic wave is generated in both the depth and width direction of the microchannel. The acoustophoretic force exerted by the standing wave on the particles focuses them to the channel center. A parametric study of the effect of flow rate, particle size and ultrasound conditions on the focusing efficiency was performed. Furthermore, the reactive precipitation of calcium carbonate and barium sulfate was chosen as a model system for material synthesis. The acoustophoretic focusing effect avoids solid deposition on the channel walls and thereby minimizes reactor fouling and thus prevents clogging. Both the average particle size and the span of the particle size distribution of the synthesized particles are reduced by applying high-frequency ultrasound. The developed reactor has the potential to control a wide range of material synthesis processes. Royal Society of Chemistry 2019-01-21 2018-12-18 /pmc/articles/PMC6336152/ /pubmed/30560264 http://dx.doi.org/10.1039/c8lc00675j Text en This journal is © The Royal Society of Chemistry 2019 http://creativecommons.org/licenses/by-nc/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported Licence (CC BY-NC 3.0)
spellingShingle Chemistry
Dong, Zhengya
Fernandez Rivas, David
Kuhn, Simon
Acoustophoretic focusing effects on particle synthesis and clogging in microreactors
title Acoustophoretic focusing effects on particle synthesis and clogging in microreactors
title_full Acoustophoretic focusing effects on particle synthesis and clogging in microreactors
title_fullStr Acoustophoretic focusing effects on particle synthesis and clogging in microreactors
title_full_unstemmed Acoustophoretic focusing effects on particle synthesis and clogging in microreactors
title_short Acoustophoretic focusing effects on particle synthesis and clogging in microreactors
title_sort acoustophoretic focusing effects on particle synthesis and clogging in microreactors
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336152/
https://www.ncbi.nlm.nih.gov/pubmed/30560264
http://dx.doi.org/10.1039/c8lc00675j
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