The role of membranes in the use of natural salinity gradients for reverse electrodialysis

Rijnaarts, Timon

doi:10.3990/1.9789036545402

Cited by 2 publications

(3 citation statements)

References 15 publications

(17 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Having primarily focused on the physical properties of the membranes in the analysis, another critical aspect to be discussed in the subsequent sections is the retention of ion exchange characteristics in these blends’ content. As the functional performance of the membranes, particularly in terms of ion transport and resistance, hinges on the presence and effectiveness of ion-exchange groups [ 15 ], it is crucial to verify whether these membranes maintain the ion exchange properties that are fundamental to Nafion’s efficacy in applications like salinity gradient energy harvesting [ 16 , 17 ]. Our upcoming results provide a comprehensive understanding of how blend composition influences both the structural and operational aspects of IEMs.…”

Section: Resultsmentioning

confidence: 99%

Ultra-Thin Ion Exchange Membranes by Low Ionomer Blending for Energy Harvesting

Jung,

Choi,

Kang

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

Exploring the utilization of ion exchange membranes (IEMs) in salinity gradient energy harvesting, a technique that capitalizes on the salinity difference between seawater and freshwater to generate electricity, this study focuses on optimizing PVDF to Nafion ratios to create ultra-thin membranes. Specifically, our investigation aligns with applications such as reverse electrodialysis (RED), where IEMs facilitate selective ion transport across salinity gradients. We demonstrate that membranes with reduced Nafion content, particularly the 50:50 PVDF:Nafion blend, retain high permselectivity comparable to those with higher Nafion content. This challenges traditional understandings of membrane design, highlighting a balance between thinness and durability for energy efficiency. Voltage–current analyses reveal that, despite lower conductivity, the 50:50 blend shows superior short-circuit current density under salinity gradient conditions. This is attributed to effective ion diffusion facilitated by the blend’s unique microstructure. These findings suggest that blended membranes are not only cost-effective but also exhibit enhanced performance for energy harvesting, making them promising candidates for sustainable energy solutions. Furthermore, these findings will pave the way for advances in membrane technology, offering new insights into the design and application of ion exchange membranes in renewable energy.

show abstract

Section: Resultsmentioning

confidence: 99%

Ultra-Thin Ion Exchange Membranes by Low Ionomer Blending for Energy Harvesting

Jung,

Choi,

Kang

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…In any case, there is still a large margin for future progress in 3D printing of profiled membranes since, due to bleeding during curing, replication errors and a low-profile resolution are currently frequent [60]. Alternatively, the corrugations can be deposited on the top of a commercially-available membrane [53] (Figure 7d). 3D printing opens also an exciting new opportunity to create homogeneous profiled membranes with different shapes (Figure 8), which can be firstly designed and optimized by CFD simulations.…”

Section: Preparation Of Profiled Ion Exchange Membranesmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Profiled Ion Exchange Membranes: A Comprehensible Review

Pawlowski

Crespo

Велизаров

2019

IJMS

View full text Add to dashboard Cite

Profiled membranes (also known as corrugated membranes, micro-structured membranes, patterned membranes, membranes with designed topography or notched membranes) are gaining increasing academic and industrial attention and recognition as a viable alternative to flat membranes. So far, profiled ion exchange membranes have shown to significantly improve the performance of reverse electrodialysis (RED), and particularly, electrodialysis (ED) by eliminating the spacer shadow effect and by inducing hydrodynamic changes, leading to ion transport rate enhancement. The beneficial effects of profiled ion exchange membranes are strongly dependent on the shape of their profiles (corrugations/patterns) as well as on the flow rate and salts’ concentration in the feed streams. The enormous degree of freedom to create new profile geometries offers an exciting opportunity to improve even more their performance. Additionally, the advent of new manufacturing methods in the membrane field, such as 3D printing, is anticipated to allow a faster and an easier way to create profiled membranes with different and complex geometries.

show abstract

The role of membranes in the use of natural salinity gradients for reverse electrodialysis

Abstract: All rights reserved PhD thesis, University of Twente, The Netherlands With references, with summaries in English and Dutch 195 pages Cover design: Timon Rijnaarts

Cited by 2 publications

References 15 publications

Ultra-Thin Ion Exchange Membranes by Low Ionomer Blending for Energy Harvesting

Ultra-Thin Ion Exchange Membranes by Low Ionomer Blending for Energy Harvesting

Profiled Ion Exchange Membranes: A Comprehensible Review

Contact Info

Product

Resources

About