Multilayered membrane spacer: does it enhance solution mixing?

Al-Amshawee, Sajjad Khudhur Abbas and Mohd Yusri, Mohd Yunus and Habib Dakhil, Ihsan (2023) Multilayered membrane spacer: does it enhance solution mixing? Journal of Chemical Technology and Biotechnology, 98 (11). pp. 2627-2638. ISSN 1097-4660. (Published)

	Pdf jctb.7344 2.pdf Restricted to Repository staff only Download (3MB) | Request a copy
Preview	Pdf Multilayered membrane spacer.pdf Download (109kB) | Preview

Abstract

The present review systematically investigates and illustrates the effect of multilayered membrane spacers on the features of fluid dynamics that influence all performance metrics. Multilayer spacers are frequently composed of three sets of filaments (i.e., top, middle, and bottom layers), which has the benefit of increasing mass transfer and decreasing membrane surface fouling when compared to ordinary monolayer (e.g., extruded spacer) and two-layer spacers. The review found that the multilayer spacer's middle layer disperses primary flow to the thin side spacers placed near the membrane's surfaces. The thin side spacers will then form narrow passageways to keep the solution in situ for as long as mass transfer is achievable. The employment of thin spacers close to the membranes at satisfactory operational conditions (e.g., adequate flow velocity) results in swirling flows and incorporation of transverse and longitudinal eddies near to the membranes, reducing the boundary layer's width and making the associated ion concentration domain at the membranes much more consistent. The concept and implementation of multilayer geometry in feed channels appears to be promising, since a multilayered spacer can function at a lower maximum flow velocity than normal two-layer spacers, saving operational energy while minimizing concentration gradients at the membrane surfaces. Furthermore, the multilayer structure's durability and mechanical strength may help to reduce membrane deformation and maintain long processes. Future studies might look at significantly reducing spacer thickness for industrial uses.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	channel hydrodynamics; electrodialysis desalination; ion exchange membranes; mass transfer; membrane fouling/clogging; membrane spacer geometry; multilayered membrane spacer; pressure drops; spacer filaments/strands; spacer–bulk attack angle; wastewater treatment
Subjects:	Q Science > Q Science (General) T Technology > T Technology (General) T Technology > TP Chemical technology
Faculty/Division:	Centre for Sustainability of Mineral & Resource Recovery Technology (SMARRT) Faculty of Chemical and Process Engineering Technology
Depositing User:	Ms. Nurul Ain Ismail
Date Deposited:	03 Jul 2024 08:21
Last Modified:	03 Jul 2024 08:21
URI:	http://umpir.ump.edu.my/id/eprint/41792
Download Statistic:	View Download Statistics

Actions (login required)

View Item