Redox flow desalination based on the temperature difference as a driving force

Dai, Jinhong; Huang, Mingzhi; Hui, Kwan San; Yu, Denis Y. W.; Yan, Dongliang; Hui, Kwun Nam; Tan, Swee Ching; Zhang, Liguo; Chen, Fuming

doi:10.1016/j.cej.2020.127716

Cited by 19 publications

(14 citation statements)

References 50 publications

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Section: Resultsmentioning

confidence: 99%

“…We believe it is mainly attributed to the 2D water pathways and enhanced capillary exchange by the intertwined structure of FM, which guarantee sufficient water supply and ion convection between bulk water and solar evaporator to prevent salt precipitation (Figure S9). [30][31][32][33][34][35][36][37][38][39][40] To further stress out the high solar desalination performance of FM-PPy, water evaporation test was carried out under 1.5, 2, and 3 suns. By monitoring mass change of 4 wt% brine solution, it's found that FM-PPy could realize 1.68 ± 0.08 kg/m 2 h, 2.35 ± 0.02 kg/m 2 h and 3.27 ± 0.13 kg/m 2 .h water evaporation under 1.5, 2 and 3 suns respectively (Supporting Figure S10A, B).…”

Section: Recycled Fm Based Solar Thermal Evaporationmentioning

confidence: 99%

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Repurposing face mask waste to construct floating photothermal evaporator for autonomous solar ocean farming

Guo

Zhang

et al. 2022

EcoMat

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142

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Section: Resultsmentioning

confidence: 99%

Section: Recycled Fm Based Solar Thermal Evaporationmentioning

confidence: 99%

Repurposing face mask waste to construct floating photothermal evaporator for autonomous solar ocean farming

Guo

Zhang

et al. 2022

EcoMat

Self Cite

142

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“…Each compartment of the electrolyte or salt feed has a cuboid size with a width of 0.3 cm and a cross-sectional area (the active area during desalination) of 1.5 × 1.5 cm 2 . Except for the two outermost sheets of acrylic materials, the rest are made of silicone …”

Section: Methodsmentioning

confidence: 99%

High-Efficiency Photo-Thermo-Electric System with Waste Heat Utilization and Energy Storage

Liu

Long

et al. 2022

ACS Appl. Mater. Interfaces

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In a photo-thermo-electric system, solar energy is first converted into heat and then into electrical energy, which has attracted much attention. However, the heat of the cold side of a thermoelectric generator (TEG) is generally removed by an aircooling or water-cooling technology without being fully utilized, resulting in a low solar energy utilization efficiency. Here, we designed an integrated system composed of a photo-thermoelectric conversion part and a waste energy collection part. In this system, one carbon foam (CF) doped with PPy and PEG is used as a layer for photothermal conversion and energy storage, and the other CFwhere one side was hydrophobically modifiedis used for the storage of cooling water and the recovery of waste heat. The two CF layers contact the hot and cold sides of TEG, respectively. With the system, solar energy can be converted into heat and then electricity for TEG. On the other hand, waste heat can be utilized for seawater desalination by the process of water evaporation. In addition, the integrated system can work sustainably under intermittent light conditions. With the recovery of waste heat, the solar energy utilization efficiency in this system is greatly increased to as much as 86%.

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“…Upon optimization of PEDOT electrodes grown with different cycles, the electrocatalytic activity is enhanced. Since the PEDOT increased the capacitive behavior, the electrochemically active surface reaction induces the redox reaction of the [Fe(CN 6 )] 3/4– species ,− (Figure S2a). The electrocatalytic activity is gradually increased for the PEDOT samples prepared at 5, 10, and 15 cycles.…”

Section: Results and Discussionmentioning

confidence: 99%

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

Karthick

Zhu

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Both low-energy consumption and high salt removal rate are highly required in the electrochemical desalination. In this work, a conducting polymer poly(3,4-ethylene-dioxythiophene), i.e., PEDOT, is electrochemically decorated on a graphite foil as an electrode material of redox-flow desalination (RFD). At a current density of 2 mA•cm −2 , the energy consumption of the RFD is reduced to 38.1 kJ•mol −1 with PEDOT-modified electrodes, compared with 154.5 kJ•mol −1 using a bare graphite electrode. Meanwhile, the salt removal rate is enhanced to 1.54 μmol•cm −2 •min −1 using the PEDOT electrode from 1.11 μmol•cm −2 •min −1 in the bare graphite electrode. The PEDOT electrodes can also provide excellent cycling stability. The improved performance may be due to the promising conductivity and porous structure of PEDOT, which would supply more active sites between the electrode and the redox electrolyte. The current research provides an electrochemical desalination strategy with low energy consumption and high salt removal rate, which is significant for the development of RFD technology.

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Redox flow desalination based on the temperature difference as a driving force

Cited by 19 publications

References 50 publications

Repurposing face mask waste to construct floating photothermal evaporator for autonomous solar ocean farming

Repurposing face mask waste to construct floating photothermal evaporator for autonomous solar ocean farming

High-Efficiency Photo-Thermo-Electric System with Waste Heat Utilization and Energy Storage

Efficient PEDOT Electrode Architecture for Continuous Redox-Flow Desalination

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