A salt-rejecting solar evaporator for continuous steam generation

Xiao, Yonghong; Wang, Xun; Li, Chenxing; Peng, Huan; Zhang, Tuqiao

doi:10.1016/j.jece.2020.105010

Cited by 36 publications

(22 citation statements)

References 37 publications

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“…It has also been observed that the water channels can limit system efficiency in some devices; therefore, using an efficient water channel is suggested . From this typical structure, a tree-inspired design has also evolved that contains rootlike structures that carry water through the water channels and stemlike structures that provide insulation and mechanical strength to the devices. , …”

Section: Introductionmentioning

confidence: 99%

“…Here, we have demonstrated a JH structure of LIG that can mimic the root structure, leaves, and water-carrying tissue structure of a tree. , The device has been tested with solar energy and more extensively with electricity for steam generation. The effect of an increase in JH area, levels of stacking, and different stacking configurations on evaporation rate, spatial footprint requirement, and electrical energy consumption has been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…15 From this typical structure, a tree-inspired design has also evolved that contains rootlike structures that carry water through the water channels and stemlike structures that provide insulation and mechanical strength to the devices. 16,17 Although many studies have been carried out to improve the evaporation performance and exploration of steam applications, some of these involve concentrated solar fluxes using expensive optical concentrators. 18 The use of optical devices for enhanced illumination intensity can significantly increase the cost, whereas Joule heating can be relatively inexpensive and promising for sustainable energy utilization through the use of renewable energy sources.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Barbhuiya

Misra

Singh

2022

ACS Appl. Nano Mater.

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The global scenario of water shortage and pollution has necessitated the use of advanced water treatment and desalination technologies. Solar interfacial evaporation has shown promising results for clean water generation but depends on the sunlight intensity, which changes over time and climatic conditions. Furthermore, the solar-driven interfacial evaporation cannot operate in the dark and is susceptible to salt deposition. Here, we have explored the Joule heating effect in laser-induced graphene (LIG)-based Joule heaters (JHs) for interfacial water evaporation under different applied voltages. The effect of stacking of Joule heaters has been explored and found to give an enhanced evaporation rate with less spatial footprint and energy consumption. The evaporation rate in a single-layer LIG JH reached ∼5 kg·m–2·h–1 under the application of 10 V. The JH area and its stacking effect on evaporation rate, spatial footprint, and energy consumption were investigated. An increase in evaporation rate by seven times and reduction of electrical energy consumption by three times has been demonstrated by three levels of stacking compared to its equivalent triple-area LIG JH. The enhanced performance of the stacking configuration could be due to the enhanced heat transfer from the bottom JH to the upper JH, thermal concentration, and reduced thermal losses to the environment. The single-layer LIG JH also gave ∼2 kg·m–2·h–1 evaporation rate under natural sunlight and environmental conditions, showing potential for solar interfacial evaporation. The JHs also showed excellent resistance to salt deposition with self-salt-cleaning capability under the tested conditions. These compact stacked JH systems could be integrated with renewable energy, which can be operated in the presence and absence of sunlight. Such compact JH systems with a lesser spatial footprint, enhanced evaporation rate, and reduced energy requirement can help in providing constant water evaporation for various applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Barbhuiya

Misra

Singh

2022

ACS Appl. Nano Mater.

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“…In addition to the water evaporation rate, salt pollution is another challenge for long team, stabilization, sustainability, and low operation and maintenance costs solar steam generation technology. [19,20] Normally, after a certain period of evaporation with seawater, the surface of the evaporator would be suffered from salt scaling pollution, which will deteriorate the evaporation efficiency and system functions. In order to address the salt scaling problems, few types of technologies have been proposed, including: [20] 1) using the manual and mechanical methods to remove the surface deposited salts, [21,22] 2) unique structure that only selective water can be transported, [23,24] 3) Janus membranes which upper layer keeps the salt from reaching surface and dissolve the deposited salt back to bulk water through the underneath layer, [25][26][27] 4) hydrophobized surfaces by some polymers to prevent salt clogging, [6] 5) local crystallization by unique geometry designed, [3,28,29] 6) provides a salt return channel by unique structure designed, [30,31] and 7) auto-cleaning or selfcleaning technologies driven by chemical potential.…”

mentioning

confidence: 99%

Water‐Light Induced Self‐Blacking System Constituted by Quinoa Cellulose and Graphene Oxide for High Performance of Salt‐Rejecting Solar Desalination

Yang

Suo

Chen

et al. 2021

Advanced Sustainable Systems

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Recently, considerable interests have been attracted by agriculture and forestry resources for efficient solar steam generation, due to that of inexhaustible nature source with many extremely good performances, such as renewability, biodegradability, biocompatibility, and importantly inherent porous structures. [3,[12][13][14] Many nature plant based materials have been carbonized directly to achieve high efficiency solar steam generation, such as carbonized corncob, [3] carbonized mushrooms, [5] carbonized pollen power activated by CuCl 2 where a piece of basswood used as substrate, [6] carbonized willow catkins with nano tubal surface structure [15] with the evaporation rate of 4.16, 1.47, 1.87, 2.17 kg m −2 h −1 under one sun respectively. Also, cellulose [16] and softwood pulp, [17] which are extracted from plants, are employed to manufactured evaporator with the help of sun light absorber polymer (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate, PEDOT:PSS) and carbon black respectively.Many efforts have largely improved the efficiency of solar energy utilization and achieved significantly results in high speeds for evaporation water. [1,3,18] However, the promotion of these photothermal materials is restricted by high-temperature pyrolysis process or their complex polymeric methods, which would need much more extra energy, time and cost. In addition to the water evaporation rate, salt pollution is another challenge for long team, stabilization, sustainability, and low operation and maintenance costs solar steam generation technology. [19,20] Normally, after a certain period of evaporation with seawater, the surface of the evaporator would be suffered from salt scaling pollution, which will deteriorate the evaporation efficiency and system functions. In order to address the salt scaling problems, few types of technologies have been proposed, including: [20] 1) using the manual and mechanical methods to remove the surface deposited salts, [21,22] 2) unique structure that only selective water can be transported, [23,24] 3) Janus membranes which upper layer keeps the salt from reaching surface and dissolve the deposited salt back to bulk water through the underneath layer, [25][26][27] 4) hydrophobized surfaces by some polymers to prevent salt clogging, [6] 5) local crystallization by unique geometry designed, [3,28,29] 6) provides a salt return channel by unique structure designed, [30,31] and 7) auto-cleaning or selfcleaning technologies driven by chemical potential. [32] Among them, auto-cleaning strategy is an attractive technology for Salt deposits are a key challenge of solar driven desalination technology due to the fact that the evaporation rate of the system sharply deteriorates when salt accumulates. In this paper, a self-blacking aerogel (SBA) is first demonstrated with excellent deposited salt self-cleaning performance, and the self-cleaning mechanism is illustrated by the theory of chemical potential. The color of the SBA can be changed from light brown to black under the inducement of water ...

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“…Anti-salt performance is very important to practical application of solar evaporation evaporator because of surface accumulated salt largely diminishing the performance of the evaporator 61 . The materials possessed self-salt cleaning property need to have super-hydrophilicity and enough water transmission channel to satisfy its rapid self-salt cleaning performance, which have been reported by pervious studies 61 – 63 . Interestingly, Zn-CFQC shows a valuable automatic-salt-cleaning capability.…”

Section: Resultsmentioning

confidence: 88%

Carbon fiber coated by quinoa cellulose nanosheet with outstanding scaled salt self-cleaning performance and purification of organic and antibiotic contaminated water

Yang

Suo

Zhao

et al. 2022

Sci Rep

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To date, various solar driven evaporation technologies have been developed for treatment of seawater and wastewater but with the threat from salt polluted and single treatment of seawater. Herein, we develop a multifunctional evaporator constructed by carbon fiber coated by quinoa cellulose nanosheet (CFQC) with outstanding self-cleaning performance and good purification property for treatment of organic and antibiotic polluted water. The resulting Zn-CFQC exhibits good light to thermal performance which can absorb about 86.95% lights in the range of UV–Vis–NIR (200–2500 nm); therefore, the wet and dry surface temperatures of Zn-CFQC are held at 62.1 and 124.3 °C respectively, and keep a speed of 3.2 kg m−2 h−1 for water evaporating under 1000 W m−2 illumination. Such good light-to-thermal capabilities can be mainly imputed to the unique surface microstructures of the carbon fiber which decorated by two-dimension cellulose and activated by ZnCl2. Additionally, Zn-CFQC shows good salt automatic-cleaning capability at night and corresponding mechanism has been simply elucidated according to the chemical potential theory. The method of treatment of carbon fiber opens a new way for commercial carbon fiber utilization of solar assisted water purification.

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A salt-rejecting solar evaporator for continuous steam generation

Cited by 36 publications

References 37 publications

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Water‐Light Induced Self‐Blacking System Constituted by Quinoa Cellulose and Graphene Oxide for High Performance of Salt‐Rejecting Solar Desalination

Carbon fiber coated by quinoa cellulose nanosheet with outstanding scaled salt self-cleaning performance and purification of organic and antibiotic contaminated water

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