A comparative performance analysis of stand-alone, off-grid solar-powered sodium hypochlorite generators

Chinello, Enrico; Modestino, Miguel A.; Schüttauf, Jan‐Willem; Coulot, Laurent; Ackermann, Mathieu; Gerlich, Florian; Faes, Antonin; Moser, Christophe

doi:10.1039/c9ra02221j

Cited by 7 publications

(5 citation statements)

References 42 publications

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“…The second involves supplying, without limits, the NaOCl needed to sterilize the waters produced by the desalination facilities. The cost effectiveness of OSG for NaOCl has been investigated and confirmed by early reports [8][9][10].…”

Section: Introductionmentioning

confidence: 72%

Production of Sodium Hypochlorite Water Disinfectant from Seawater Desalination Brine

Rabah,

Aldalou

2023

ajc

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he research explores the onsite generation (OSG) of sodium hypochlorite (NaOCl) from desalination brine in Gaza, Palestine. The process produces NaOCl as a valuable water disinfectant and contributes to marine environment protection and public health by reducing brine discharged to the sea. Batch experiments were used to examined the characteristics of producing NaOCl studying five factors viz. electrolysis time, current density, electrode type, electrode spacing and stability of the produced NaOCl. The highest NaOCl concentration was 2.17%, achieved with graphite electrodes 1.3 cm diameter, with 1cm electrodes spacing, 120 min electrolysis time, 180 mA/cm2 current density and 25 ± 2 ºC solution temperature. The NaOCl degradation rate was 1.8% and 10% daily when stored in dark places or exposed to direct sunlight, respectively. Thus, it is recommended to store NaOCl in dark places to minimize its degradation. The present study suggests the OSG of NaOCl as a promising alternative for brine management in Gaza and worldwide.

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Section: Introductionmentioning

confidence: 72%

Production of Sodium Hypochlorite Water Disinfectant from Seawater Desalination Brine

Rabah,

Aldalou

2023

ajc

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“…Besides H 2 O 2 , chlorine gas (Cl 2 ), bromine gas (Br 2 ) and sodium hydroxide (NaOH) are usually advocated as interesting anodic products. 8,54 More recently, Palmer et al showed that also uorine, iodine, methane decomposition (to carbon), potassium permanganate, sodium bromate, sodium chlorate and sodium persulfate production should be considered. 46 They based this on the calculation of the net value of the chemicals per unit of energy input.…”

Section: àmentioning

confidence: 99%

Industrial feasibility of anodic hydrogen peroxide production through photoelectrochemical water splitting: a techno-economic analysis

Wenderich

Kwak

Grimm

et al. 2020

Sustainable Energy Fuels

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“…A first laboratory prototype with seven cells achieved a direct sunlight conversion efficiency of 36.4% in 2016. 9,10 A pilot site is installed since 2017 at the rooftop of EPFL, Switzerland (Figure 1A) to validate the robustness of the module architecture and tracking mechanism. 10 In 2019, a 0.1-m 2 pre-series module was characterized with a 29.0% efficiency at Concentrator Standard Test Conditions (CSTC, as defined in IEC 62670-1).…”

Section: Insolight's Planar Micro-tracking Module With Diffuse Light Harvestingmentioning

confidence: 99%

Industrialization of hybrid Si/III–V and translucent planar micro‐tracking modules

Nardin

Domínguez

Aguilar

et al. 2020

Progress in Photovoltaics

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A tracking-integrated hybrid micro-concentrator module is presented that can harvest direct, diffuse, and albedo irradiance components. It uses biconvex 180× lens arrays to concentrate direct light on high-efficiency III-V solar cells (29% module efficiency has been demonstrated outdoors on direct sunlight at Concentrator Standard Test Conditions) and a planar micro-tracking mechanism to allow installation in static frames. Two architectures have been developed to harvest diffuse irradiance: (1) a hybrid architecture where the backplane is covered with monofacial or bifacial Si cells; (2) a translucent architecture where diffuse light is transmitted through the module for dual-land-use applications, such as agrivoltaics. Simulations show that the hybrid architecture provides an excess of yearly energy production compared to 20% efficiency flat-plate photovoltaic (PV) module in all locations studied, including those with a low direct normal irradiance (DNI) content, and up to 38% advantage in high-DNI locations. The use of bifacial heterojunction and interdigitated back-contact Si cells has been explored for the glass-Si-glass backplane laminate to harvest albedo light. Bifacial gains modeled can boost energy yield by about 30% in the best scenario. We discuss the perspectives of the translucent modules for dual-land-use applications as well, such as integration in greenhouses for agriculture-integrated PV (agrivoltaics). This architecture can provide up to 47% excess electricity compared to a spaced reference Si array that transmits the same amount of solar

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A comparative performance analysis of stand-alone, off-grid solar-powered sodium hypochlorite generators

Abstract: Solar-powered electrochemical technologies can be employed to generate valuable chemical commodities on-site. We demonstrate solar-driven production of sodium hypochlorite, a widely employed water disinfection agent.

Cited by 7 publications

References 42 publications

Production of Sodium Hypochlorite Water Disinfectant from Seawater Desalination Brine

Production of Sodium Hypochlorite Water Disinfectant from Seawater Desalination Brine

Industrial feasibility of anodic hydrogen peroxide production through photoelectrochemical water splitting: a techno-economic analysis

Industrialization of hybrid Si/III–V and translucent planar micro‐tracking modules

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