Hydrogen production by a low-cost electrolyzer developed through the combination of alkaline water electrolysis and solar energy use

Palhares, Dayana D’Arc de Fátima; Vieira, Luiz Gustavo Martins; Damasceno, João Jorge Ribeiro

doi:10.1016/j.ijhydene.2018.01.051

Cited by 95 publications

(30 citation statements)

References 37 publications

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“…Hence, the averaged value over the whole day is 233 W m −2 for a sunny day and only 29 W m −2 for a cloudy day. The volume flow of the produced hydrogen directly follows the renewable energy profile used for operation [70]. Only a short delay is noticeable for the gas purity, which is defined by the system volume [71].…”

Section: Renewable Energymentioning

confidence: 99%

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Alkaline Water Electrolysis Powered by Renewable Energy: A Review

2020

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Alkaline water electrolysis is a key technology for large-scale hydrogen production powered by renewable energy. As conventional electrolyzers are designed for operation at fixed process conditions, the implementation of fluctuating and highly intermittent renewable energy is challenging. This contribution shows the recent state of system descriptions for alkaline water electrolysis and renewable energies, such as solar and wind power. Each component of a hydrogen energy system needs to be optimized to increase the operation time and system efficiency. Only in this way can hydrogen produced by electrolysis processes be competitive with the conventional path based on fossil energy sources. Conventional alkaline water electrolyzers show a limited part-load range due to an increased gas impurity at low power availability. As explosive mixtures of hydrogen and oxygen must be prevented, a safety shutdown is performed when reaching specific gas contamination. Furthermore, the cell voltage should be optimized to maintain a high efficiency. While photovoltaic panels can be directly coupled to alkaline water electrolyzers, wind turbines require suitable converters with additional losses. By combining alkaline water electrolysis with hydrogen storage tanks and fuel cells, power grid stabilization can be performed. As a consequence, the conventional spinning reserve can be reduced, which additionally lowers the carbon dioxide emissions.

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Section: Renewable Energymentioning

confidence: 99%

“…Photovoltaic panels convert the solar radiation into electricity, which can be used for the operation. The implementation of a DC/DC power converter is optional, as direct and indirect coupling is possible[70,78,79].…”

mentioning

confidence: 99%

Alkaline Water Electrolysis Powered by Renewable Energy: A Review

2020

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“…22,26 Another factor responsible for the decrease in efficiency is the sensitivity of photovoltaic panels to variations in solar radiation and ambient temperature. 14 To reduce losses due to overvoltage, it is recommended to use a DC-DC circuit converter, however, the use of this device increases the overall efficiency of the system, but slightly reduces the efficiency of the reactor due to the heating of electrolytes, in addition to ohmic losses. 21 The total efficiency of electrolysis when the DC source was used reached 4.43 ± 0.66%.…”

Section: Resultsmentioning

confidence: 99%

“…[10][11][12][13] Alternatively, some research is focused on reducing hydrogen production costs by coupling the electrochemical system to photovoltaic (PV) panels. [14][15][16] Hydrogen energy storage, replacing the use of conventional batteries and photovoltaic panels coupled to an electrochemical system with alternative electrolytes, mainly pollutants, enables environmental decontamination. [17][18][19] As a result of the problems caused by AMD, its control and treatment are of great importance for inspection agencies and the mining companies themselves.…”

Section: Introductionmentioning

confidence: 99%

Acid mine drainage wastewater photoelectrolysis for hydrogen fuel generation: Preliminary results

Marques¹,

Valane²,

Buzato³

2020

Int J Energy Res

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Acid mine drainage (AMD) occurs when sulfide composite materials are exposed to oxygen gas, water, and microorganisms present in the environment. An alternative for the treatment of this residual water is the generation of hydrogen gas by electrolysis using a photovoltaic system. In this work, an electrolytic cell with 304 stainless steel electrodes was to form hydrogen gas. After 390 minutes of hydrogen generation, it was observed that the accumulated amount of H 2 was 254 mL when PV panels were used as the current source. When using AMD, hydrogen generation was 5.5 times higher compared to that using the sulfuric acid solution under the same experimental conditions. The electrolyte AMD conductivity diminished from 3850 μS cm −1 to 2960 μS cm −1. The decrease in conductivity may be related to removal of metal ions from the solution by the formation of insoluble compounds. After 390 minutes of testing, electrolysis using a PV panel resulted in a 9-fold increase in the total solid content. The reduction of iron and manganese ions in AMD samples was approximately 60% and 10%, respectively. No decrease in sulfate concentration and low pH variation were observed.

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“…The process efficiency is determined by electrical and thermal behaviors of the electrochemical reaction. The electrolysis process produces high purity hydrogen 99.999% with an efficiency of 70% [24,25]. One major issue with the electrolysis process is that the electrodes tend to degrade overtime causing an increase of resistance, forcing the performance to slow down.…”

Section: Electrolysis Of Watermentioning

confidence: 99%

Hydrogen Technologies for Mobility and Stationary Applications: Hydrogen Production, Storage and Infrastructure Development

Khzouz¹,

Gkanas²

2020

Renewable Energy - Resources, Challenges and Applications

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The present chapter focuses on hydrogen technologies for both stationary and mobility/transportation applications. Hydrogen production from sustainable resources for the generation of pure and low cost hydrogen is described in the chapter. Several potential hydrogen production techniques are introduced and analyzed. The challenges and the advantages of each production method will be discussed. Furthermore, the chapter will introduce hydrogen infrastructure development for mobility applications and will discuss hydrogen storage challenges. Hydrogen production for fuel cell technologies requires an improvement regarding sustainability of the hydrogen supply and an improvement regarding decentralized hydrogen production. Moreover, hydrogen economy as far requires a large scale and long term storage solution to meet the increasing demand.

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Hydrogen production by a low-cost electrolyzer developed through the combination of alkaline water electrolysis and solar energy use

Cited by 95 publications

References 37 publications

Alkaline Water Electrolysis Powered by Renewable Energy: A Review

Alkaline Water Electrolysis Powered by Renewable Energy: A Review

Acid mine drainage wastewater photoelectrolysis for hydrogen fuel generation: Preliminary results

Hydrogen Technologies for Mobility and Stationary Applications: Hydrogen Production, Storage and Infrastructure Development

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