Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone

Abstract The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and nu...

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Autores principales:	Yuan Huang, Hua-lin Wang, Yu-quan Chen, Yan-hong Zhang, Qiang Yang, Zhi-shan Bai, Liang Ma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d2333371e79245c9938bf9c1efeea08c
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spelling	oai:doaj.org-article:d2333371e79245c9938bf9c1efeea08c2021-12-02T12:30:28ZLiquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone10.1038/s41598-017-02732-x2045-2322https://doaj.org/article/d2333371e79245c9938bf9c1efeea08c2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02732-xhttps://doaj.org/toc/2045-2322Abstract The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and numerical methods to study the multi-scale motion of particles in hydrocyclones. In addition to the usually considered translational behavior, the high-speed rotation of dispersed micro-spheres caused by the anisotropic swirling shear flow is determined. The rotation speeds of the tested micro-spheres are above 1000 rad s−1, which are much larger than the instantaneous rotation speed in isotropic turbulence. Due to the conical structure of a hydrocyclone, the rotation speed maintains stability along the axial direction. Numerical results show that the particle Reynolds number of micro-droplets in a hydrocyclone is equal to that in conventional extractors, but the particles have high rotation speeds of up to 10,000 rad s−1 and long mixing lengths of more than 1000 mm. Both the rotation of micro-droplets along the spiral trajectories and the intense eddy diffusion in a hydrocyclone contribute to the extraction intensification.Yuan HuangHua-lin WangYu-quan ChenYan-hong ZhangQiang YangZhi-shan BaiLiang MaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuan Huang Hua-lin Wang Yu-quan Chen Yan-hong Zhang Qiang Yang Zhi-shan Bai Liang Ma Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
description	Abstract The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and numerical methods to study the multi-scale motion of particles in hydrocyclones. In addition to the usually considered translational behavior, the high-speed rotation of dispersed micro-spheres caused by the anisotropic swirling shear flow is determined. The rotation speeds of the tested micro-spheres are above 1000 rad s−1, which are much larger than the instantaneous rotation speed in isotropic turbulence. Due to the conical structure of a hydrocyclone, the rotation speed maintains stability along the axial direction. Numerical results show that the particle Reynolds number of micro-droplets in a hydrocyclone is equal to that in conventional extractors, but the particles have high rotation speeds of up to 10,000 rad s−1 and long mixing lengths of more than 1000 mm. Both the rotation of micro-droplets along the spiral trajectories and the intense eddy diffusion in a hydrocyclone contribute to the extraction intensification.
format	article
author	Yuan Huang Hua-lin Wang Yu-quan Chen Yan-hong Zhang Qiang Yang Zhi-shan Bai Liang Ma
author_facet	Yuan Huang Hua-lin Wang Yu-quan Chen Yan-hong Zhang Qiang Yang Zhi-shan Bai Liang Ma
author_sort	Yuan Huang
title	Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
title_short	Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
title_full	Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
title_fullStr	Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
title_full_unstemmed	Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
title_sort	liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d2333371e79245c9938bf9c1efeea08c
work_keys_str_mv	AT yuanhuang liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone AT hualinwang liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone AT yuquanchen liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone AT yanhongzhang liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone AT qiangyang liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone AT zhishanbai liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone AT liangma liquidliquidextractionintensificationbymicrodropletrotationinahydrocyclone
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Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone

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