Parametric study of reverse electrodialysis using ammonium bicarbonate solution for low-grade waste heat recovery

Kwon, Kilsung; Park, Byung Ho; Kim, Deok Han; Kim, Daejoong

doi:10.1016/j.enconman.2015.06.051

Cited by 53 publications

(15 citation statements)

References 38 publications

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“…In recent years, several researchers have focused their attention on the performance of RED units fed by NH4HCO3 aqueous solutions. In particular, Kwon et al [20] presented an experimental analysis, reporting a maximum power density (1.54 W/m 2 cell pair), doubling that achieved by Luo et al [18]. Similarly, Bevacqua et al [21] presented an experimental investigation aimed to maximize the performance of a laboratory RED unit fed by NH4HCO3, recording the highest power density achieved so far in RED units fed by aqueous solutions of NH4HCO3 (i.e., 2.42 W/m 2 cell pair).…”

Section: Introductionmentioning

confidence: 99%

Thermolytic reverse electrodialysis heat engine: model development, integration and performance analysis

Giacalone

Vassallo

Griffin

et al. 2019

Energy Conversion and Management

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Salinity gradient heat engines represent an innovative and promising way to convert low-grade heat into electricity by employing salinity gradient technology in a closed-loop configuration. Among the aqueous solutions which can be used as working fluid, ammonium bicarbonatewater solutions appear very promising due to their capability to decompose at low temperature. In this work, an experimentally validated model for a reverse electrodialysis heat engine fed with ammonium bicarbonate-water solutions was developed. The model consists of two validated sub-models purposely integrated, one for the reverse electrodialysis unit and the other for the stripping/absorption regeneration unit. The impact of using current commercial membranes and future enhanced membranes on the efficiency of the system was evaluated, along with the effect of operating and design parameters through sensitivity analyses. Results 2 indicated that exergy efficiency up to 8.5% may be obtained by considering enhanced future membranes and multi-column regeneration units.

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Section: Introductionmentioning

confidence: 99%

Thermolytic reverse electrodialysis heat engine: model development, integration and performance analysis

Giacalone

Vassallo

Griffin

et al. 2019

Energy Conversion and Management

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“…Another investigation was reported by Luo et al; 96 the maximum power density and energy conversion efficiency were 0.33 W/m 2 and 31%, respectively. A higher power density of 0.77 W/m 2 was obtained by Kwon et al 97 These works mainly focus on the operating conditions including concentration of feedwater and flow rate, 96,97 membrane type, 97 the design of fluid flow to reduce the effect of bubbles, 98 junction potential, 99 and the modeling setup. 95,100 More effect should be put for enhancing power density and energy efficiency by tailored membrane design and improved heat exchange system.…”

Section: Energy Recovery By Red or Ddpowermentioning

confidence: 99%

Waste Conversion and Resource Recovery from Wastewater by Ion Exchange Membranes: State-of-the-Art and Perspective

Zhao

Zhou

Yan

et al. 2018

Ind. Eng. Chem. Res.

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Wastewater treatment is in a dilemma: more energy and efforts have to be put forth to obtain an effluent with better quality, while a significant amount of sludge is generated and the treatment or disposal expenses are high. Even if the sludge is disposed of properly, the components can be released and pollute the environment again. Therefore, conversion and recovery of the contaminants to resources is the way out of the dilemma. An ion exchange membrane (IEM) is a special type of membrane, which allows charged solutes to pass through it while retaining uncharged components. Attributed to this character, IEMs are taking more important roles in separation and conversion processes recently. They act as key elements in many resource recovery systems, such as in separation and concentration, salt valorization, energy conversion, and even in microbial systems. This review summarizes the important processes for waste conversion and resource recovery from wastewaters by using IEMs. Drawbacks and perspectives are summarized in view of the development of the processes and the membranes.

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“…It is, for instance, the most efficient process when sea water and river water are considered as the feed, although there are applications wherein very-high-salinity solutions can also be used [ 12 , 13 , 14 ]. In addition, the use of treated wastewater effluents and other diverse applications of RED has contributed significantly to its versatility [ 10 , 15 , 16 , 17 , 18 ]. In contrast, CapMix utilizes the capacitive electrodes where the ion exchange membranes are not solely used [ 8 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Physicochemical Properties of Two Types of Polyepichlorohydrin-Based Anion Exchange Membranes for Reverse Electrodialysis

Karakoç

Güler

2022

Membranes

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The development of the most effective, suitable and economic ion-exchange membranes is crucial for reverse electrodialysis (RED)—the most widely studied process to harvest salinity gradient energy from mixing seawater and river water. RED utilizes two types of membranes as core elements, namely cation exchange membranes (CEM) and anion exchange membranes (AEM). Since the preparation of AEMs is more complex compared to CEMs, the design and development of anion exchange membranes have been the focus in this study. Homogeneous AEMs based on two types of polyepichlorohydrin (PECH) with different chlorine amounts (PECH-H, 37 wt% and PECH-C, 25 wt%) were synthesized, and first-time benchmarking of the membrane properties was conducted. In addition to physicochemical membrane properties, some instrumental analyses such as SEM, FTIR and DSC were investigated to characterize these anion-exchange membranes. Based on the results, although the PECH-H-type membrane had enhanced ion-exchange properties, PECH-C-based anion-exchange membranes exhibited a higher power density of 0.316 W/m2 in a lab-scale RED system. Evidently, there is room for the development of new types of PECH-C-based AEMs with great potential for energy generation in the RED process.

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Parametric study of reverse electrodialysis using ammonium bicarbonate solution for low-grade waste heat recovery

Cited by 53 publications

References 38 publications

Thermolytic reverse electrodialysis heat engine: model development, integration and performance analysis

Thermolytic reverse electrodialysis heat engine: model development, integration and performance analysis

Waste Conversion and Resource Recovery from Wastewater by Ion Exchange Membranes: State-of-the-Art and Perspective

Comparison of Physicochemical Properties of Two Types of Polyepichlorohydrin-Based Anion Exchange Membranes for Reverse Electrodialysis

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