A novel combined reverse osmosis and hybrid absorption desalination-cooling system to increase overall water recovery and energy efficiency

Harby, K.; Ali, Ehab S.; Almohammadi, K.M.

doi:10.1016/j.jclepro.2020.125014

Cited by 66 publications

(20 citation statements)

References 43 publications

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“…Nowadays, global warming and industrial pollution are becoming a more and more serious concern . People are forced to pay attention to the serious shortage of freshwater resources. − Traditional seawater desalination technologies, such as reverse osmosis (RO), , microfiltration, , ultrafiltration, , multieffect distillation, , multistage flash evaporation, adsorption, , etc., have the limitations of low efficiency, high cost, redundant operation, and huge energy consumption, which aggravate the greenhouse effect and environmental pollution, thus hindering their large-scale applications. Therefore, effective production of freshwater using clean energy as the input through a much more practical way should be a priority.…”

Section: Introductionmentioning

confidence: 99%

Dual-Functional Graphene Oxide-Based Photothermal Materials with Aligned Channels and Oleophobicity for Efficient Solar Steam Generation

et al. 2021

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Desalination by solar steam generation (SSG) has emerged as one of the most efficient approaches to address the issue of global water shortage. In this work, novel graphene oxide (GO)-based solar steam generators (GO-SSGs) with aligned channels were prepared by directional freezing and simple carbonization of a hydrogel composed of GO and poly(vinyl alcohol) (PVA). Benefitting from their excellent light absorption (light absorption efficiency exceeds 94%), better thermal insulation (thermal conductivity, 0.259 W/(m K)), and suitable porous structure, which facilitates rapid water transportation, the GO-SSGs show superior SSG performance with a high solar energy conversion efficiency of up to 92% achieved under an irradiation of 1.0 kW/m 2 . Interestingly, uniquely aligned channels endow them with good salt-rejection performance; the solar energy conversion efficiency of GO-SSGs in 20 wt % NaCl, KCl, and MgCl 2 brine can reach more than 85%. To improve their antifouling performance, a chemically hydrophilic and oleophobic modification was conducted, making it possible to run SSG even in oily wastewater; for instance, a solar energy conversion efficiency of 84% was obtained in an aqueous solution containing 10 wt % n-hexadecane. Compared with the existing photothermal materials, these materials show advantages of simple manufacture, high SSG efficiency, superior salt tolerance, and antifouling performance, which make them promising candidates as a kind of new high-performance photothermal materials for desalination even in oily wastewater, thus further expanding the scope of their practical SSG application.

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Section: Introductionmentioning

confidence: 99%

Dual-Functional Graphene Oxide-Based Photothermal Materials with Aligned Channels and Oleophobicity for Efficient Solar Steam Generation

et al. 2021

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“…Fresh water and energy are two indispensable interconnected elements in all of our daily activities on Earth. This field has become one of the most important and popular research fields because the traditional desalination plants and cooling systems require a relatively high energy consumption rate 1,2 . Utilizing renewable energy sources and reducing primary energy consumption is a challenge for researchers around the world today 3 …”

Section: Introductionmentioning

confidence: 99%

“…This field has become one of the most important and popular research fields because the traditional desalination plants and cooling systems require a relatively high energy consumption rate. 1,2 Utilizing renewable energy sources and reducing primary energy consumption is a challenge for researchers around the world today. 3 One of the pressing problems and promising modern solutions to achieve the desired goals for desalination and cooling is the adsorption technology driven by a lowtemperature source.…”

Section: Introductionmentioning

confidence: 99%

Composite adsorbent materials for desalination and cooling applications: A state of the art

Alsaman

Ibrahim

Ahmed

et al. 2022

Intl J of Energy Research

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Summary Adsorption technology is very attractive for producing desalinated water and cooling with no harmful impact on the environment. The performance of adsorption water applications (desalination and cooling) depends on the adsorption characteristics. Many adsorption systems designs were investigated worldwide, employing different adsorbent materials to develop a cost‐effective and high‐performance system. This review presents and summarizes the studies in adsorption and the corresponding applications in desalination and cooling and compares the adsorption properties of composite adsorbents. The review focuses on the composite materials and how they were synthesized while comparing them in terms of the amount of adsorption. The reviewed materials have been classified according to the basic host, such as silica gel, zeolite, carbon, metal‐organic frameworks (MOF), and vermiculite. The review contains more than 70 composites. The maximum reached water vapor uptake is 1.92 kg/kg of PHTS/CaCl2‐20 wt% composite at 0.9 P/Ps. The highest available desorption amount is 1.48 kg/kg of MOF composite for desalination applications and 0.87 kg/kg of vermiculite composite for cooling applications.

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“…4,5 However, the cost of desalination for obtaining fresh water is still very high even with state-of-the-art methods; 6 hence, developing efficient and low-energy-consuming desalination techniques is of pivotal importance. 7,8 Reverse osmosis (RO) membranes have been prevalent in industrial desalination for several decades owing to their several advantages, such as high efficiency to remove dissolved substances, no extra chemical additives, ease for maintenance, etc. However, an applied pressure is required to overcome the osmosis pressure, which is heavily energy-consuming.…”

Section: Introductionmentioning

confidence: 99%

“…Although nearly 70% of the Earth’s surface is covered by water, most of it could not be directly utilized due to its high salinity for human consumption or because it is locked up in ice and snow. , More fresh water is needed with the growing population around the world in the foreseeable future, and salty water desalination is expected as a promising approach for boosting fresh water supply to mitigate the fresh water shortage. , However, the cost of desalination for obtaining fresh water is still very high even with state-of-the-art methods; hence, developing efficient and low-energy-consuming desalination techniques is of pivotal importance. , …”

Section: Introductionmentioning

confidence: 99%

Data-Driven Design of Nanopore Graphene for Water Desalination

Liang

Zhou

et al. 2021

J. Phys. Chem. C

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Development of energy-efficient and low-cost desalination techniques is of pivotal importance, and reverse osmosis (RO) is regarded as one of the most promising solutions to tackle the world water crisis and has been widely deployed for large-scale and distributed water desalination. Graphene with nanopores was considered as a promising desalination membrane due to its unique properties. However, the intrinsic complexity of the desalination process, together with the various tunable properties of the membranes/nanopores themselves, makes accurate prediction of the performance or designing of new materials challenging. Machine learning (ML) techniques are superior in analyzing physical processes from multiple aspects, which could facilitate the rational design of high-performance desalination membranes. In this work, it was discovered that salt rejection mainly depends on the pore shape, pore area, and applied pressure and that water permeation mainly depends on the pore area and applied pressure from the ML study. The physical–chemical analysis based on the ion density and water density along the nanopore offers us a deep understanding of the effect of the pore shape on salt rejection and water permeation. In light of the results of ML and the analysis of physicochemical properties, we design the graphene pore with a particular pore shape, which could achieve high water permeation with high salt rejection. ML combined with high-throughput computation methods could help us design the material with excellent performance for desalination.

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A novel combined reverse osmosis and hybrid absorption desalination-cooling system to increase overall water recovery and energy efficiency

Cited by 66 publications

References 43 publications

Dual-Functional Graphene Oxide-Based Photothermal Materials with Aligned Channels and Oleophobicity for Efficient Solar Steam Generation

Dual-Functional Graphene Oxide-Based Photothermal Materials with Aligned Channels and Oleophobicity for Efficient Solar Steam Generation

Composite adsorbent materials for desalination and cooling applications: A state of the art

Data-Driven Design of Nanopore Graphene for Water Desalination

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