Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes

Abstract Recent progresses on nanocapillary-driven water transport under metastable conditions have substantiated the potential of artificial trees for dewatering applications in a wide pressure range. This paper presents a comprehensive performance analysis of artificial trees encompassing the prin...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	Jongho Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ce841e7de122428eaf5631f1345334a6
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:ce841e7de122428eaf5631f1345334a6
record_format	dspace
spelling	oai:doaj.org-article:ce841e7de122428eaf5631f1345334a62021-12-02T13:39:29ZPerspectives and design considerations of capillary-driven artificial trees for fast dewatering processes10.1038/s41598-021-88006-z2045-2322https://doaj.org/article/ce841e7de122428eaf5631f1345334a62021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88006-zhttps://doaj.org/toc/2045-2322Abstract Recent progresses on nanocapillary-driven water transport under metastable conditions have substantiated the potential of artificial trees for dewatering applications in a wide pressure range. This paper presents a comprehensive performance analysis of artificial trees encompassing the principle for negative capillary pressure generation; impacts of structural, compositional, and environmental conditions on dewatering performance; and design considerations. It begins by delineating functionalities of artificial trees for evaporation (leaves), conduction (xylem), and filtration (root) of water, in the analogy to natural trees. The analysis revealed that the magnitude of (negative) capillary pressure in the artificial leaves and xylem must be sufficiently large to overcome the osmotic pressure of feed at the root. The required magnitude can be reduced by increasing the osmotic pressure in the artificial xylem conduits, which reduces the risk of cavitation and subsequent blockage of water transport. However, a severe concentration polarization that can occur in long xylem conduits would negate such compensation effect of xylem osmotic pressure, leading to vapor pressure depression at the artificial leaves and therefore reduced dewatering rates. Enhanced Taylor dispersions by increasing xylem conduit diameters are found to alleviate the concentration polarization, allowing for water flux enhancement directly by increasing leaf-to-root membrane area ratio.Jongho LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jongho Lee Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
description	Abstract Recent progresses on nanocapillary-driven water transport under metastable conditions have substantiated the potential of artificial trees for dewatering applications in a wide pressure range. This paper presents a comprehensive performance analysis of artificial trees encompassing the principle for negative capillary pressure generation; impacts of structural, compositional, and environmental conditions on dewatering performance; and design considerations. It begins by delineating functionalities of artificial trees for evaporation (leaves), conduction (xylem), and filtration (root) of water, in the analogy to natural trees. The analysis revealed that the magnitude of (negative) capillary pressure in the artificial leaves and xylem must be sufficiently large to overcome the osmotic pressure of feed at the root. The required magnitude can be reduced by increasing the osmotic pressure in the artificial xylem conduits, which reduces the risk of cavitation and subsequent blockage of water transport. However, a severe concentration polarization that can occur in long xylem conduits would negate such compensation effect of xylem osmotic pressure, leading to vapor pressure depression at the artificial leaves and therefore reduced dewatering rates. Enhanced Taylor dispersions by increasing xylem conduit diameters are found to alleviate the concentration polarization, allowing for water flux enhancement directly by increasing leaf-to-root membrane area ratio.
format	article
author	Jongho Lee
author_facet	Jongho Lee
author_sort	Jongho Lee
title	Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
title_short	Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
title_full	Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
title_fullStr	Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
title_full_unstemmed	Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
title_sort	perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ce841e7de122428eaf5631f1345334a6
work_keys_str_mv	AT jongholee perspectivesanddesignconsiderationsofcapillarydrivenartificialtreesforfastdewateringprocesses
_version_	1718392644086792192

Perspectives and design considerations of capillary-driven artificial trees for fast dewatering processes

Ejemplares similares