Hydrogen generators using water electrolysis process

2008 ◽  
Keyword(s):  
Water Electrolysis ◽  
Electrolysis Process

Modelling and control of an alkaline water electrolysis process

2018 ◽  
Vol 1 (2) ◽  
pp. 9-14
Author(s):  
Marisol Cervantes-Bobadilla ◽  
Ricardo Fabricio Escobar Jiménez ◽  
José Francisco Gómez Aguilar ◽  
Tomas Emmanuel Higareda Pliego ◽  
Alberto Armando Alvares Gallegos
Keyword(s):  
Process Model ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Electrolysis Process ◽  
Linear Dynamic ◽  
Energy Current ◽  
Identification Technique ◽  
Nonlinear Static ◽  
And Control

In this research, an alkaline water electrolysis process is modelled. The electrochemical electrolysis is carried out in an electrolyzer composed of 12 series-connected steel cells with a solution 30% wt of potassium hydroxide. The electrolysis process model was developed using a nonlinear identification technique based on the Hammerstein structure. This structure consists of a nonlinear static block and a linear dynamic block. In this work, the nonlinear static function is modelled by a polynomial approximation equation, and the linear dynamic is modelled using the ARX structure. To control the current feed to the electrolyzer an unconstraint predictive controller was implemented, once the unconstrained MPC was simulated, some restrictions are proposed to design a constrained MPC (CMPC). The CMPC aim is to reduce the electrolyzer's energy consumption (power supply current). Simulation results showed the advantages of using the CMPC since the energy (current) overshoots are avoided.

scholarly journals Biochar-Assisted Iron-Mediated Water Electrolysis Process for Hydrogen Production

ACS Omega ◽  
2020 ◽  
Vol 5 (49) ◽  
pp. 31908-31917
Author(s):  
Gidon Amikam ◽  
Noga Fridman-Bishop ◽  
Youri Gendel
Keyword(s):  
Hydrogen Production ◽  
Water Electrolysis ◽  
Electrolysis Process

Synthesis of MnNiO3/Mn3O4 nanocomposites for the water electrolysis process

2019 ◽  
Vol 92 (1) ◽  
pp. 1-11
Author(s):  
B. Jansi Rani ◽  
S. Rathika ◽  
G. Ravi ◽  
R. Yuvakkumar
Keyword(s):  
Water Electrolysis ◽  
Electrolysis Process

Towards re-electrification of hydrogen obtained from the power-to-gas process by highly efficient H2/O2 polymer electrolyte fuel cells

RSC Advances ◽  
2014 ◽  
Vol 4 (99) ◽  
pp. 56139-56146 ◽  
Author(s):  
Felix N. Büchi ◽  
Marcel Hofer ◽  
Christian Peter ◽  
Urs D. Cabalzar ◽  
Jérôme Bernard ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Energy Storage ◽  
Electric Power ◽  
Polymer Electrolyte ◽  
Water Electrolysis ◽  
Polymer Electrolyte Fuel Cells ◽  
Pure Oxygen ◽  
Electrolysis Process ◽  
Highly Efficient ◽  
Power To Gas

In the power-to-gas process, hydrogen, produced by water electrolysis, is used for storage of excess renewable electric power. Pure oxygen is a byproduct of the electrolysis process. Using pure oxygen as the oxidant in polymer electrolyte fuel cells can increase the efficiency of the power-to-hydrogen-to-power energy storage chain.

Performance of Distilled Water Electrolysis with Adding of Sodium Bicarbonate as Catalytic

2016 ◽  
Vol 836 ◽  
pp. 294-298
Author(s):  
Denny Widhiyanuriyawan
Keyword(s):  
Sodium Bicarbonate ◽  
Chemical Compound ◽  
Mass Fraction ◽  
Water Electrolysis ◽  
Distilled Water ◽  
Chemical Formula ◽  
Electrolysis Process ◽  
Constituent Elements ◽  
Brown’S Gas

Water is a chemical compound with chemical formula H2O. By the electrolysis proses, water can be split constituent elements, namely hydrogen (H2) and oxygen (O2). In this study, an electrolyze system used six pieces of electrodes which made from 304L SS for electrolysis process for both of distilled water and adding catalyst NaHCO3 (Sodium Bicarbonate) on distilled water. The results indicated that electrolysis process on distilled water consumed power of 353.52 Watts to produce Brown’s gas of 0.00123 l/s. Whenever, NaHCO3 was added into distilled water with the mass fraction of 1.33% consumed power decrease of 27.89 Watts and Browns gas was produced 0.0017 l/s. The efficiency of distilled water had the greatest efficiency only 5.53% by using current of 2 Ampere and power reached 31.043Watts. While the addition of catalysts had the greatest efficiency reached 40.29% in the use of mass fraction of catalyst 1.5%, 6 Ampere currents and power of 19.829 Watts.

scholarly journals Stainless Steel Cyclic Voltammograms in Dioscorea Opposita Flour Media

2021 ◽  
Vol 6 (3) ◽  
pp. 535-542
Author(s):  
Isana Supiah Yosephine Louise ◽  
Siti Marwati ◽  
S. Sulistyani ◽  
Heru Pratomo Al ◽  
Felix Arie Setiawan
Keyword(s):  
Stainless Steel ◽  
Energy Consumption ◽  
Water Electrolysis ◽  
Gas Production ◽  
Hydrogen Gas ◽  
Cyclic Voltammograms ◽  
Electrolysis Process ◽  
Dioscorea Opposita ◽  
The Media ◽  
The Cost

Improving the efficiency of hydrogen gas production in the water electrolysis process draws great attention from many scholars. To improve the efficiency of the process and reduction in the cost, stainless steel has been widely implemented in the industrial water electrolysis process. Electrolyte modification is also one of the methods to improve the water electrolysis process. The study used Dioscorea opposita tuber flour as a media addition in an alkaline solution. The efficiency of water electrolysis was evaluated by cyclic voltammetry. The result showed that the activity of the electrode and energy consumption were increased with values of 29 and 23%, respectively, by adding 3 g of the media. However, no media addition showed the lowest energy consumption regarding overpotential value. In general, the Dioscorea opposita tuber flour tends to cover the electrode and reduce the activity. Moreover, the utilization of wastewater from Dioscorea opposita flour industry is still beneficial to produce hydrogen gas instead of using freshwater.

scholarly journals INFLUENCE OF VARIOUS PHYSICAL-CHEMICAL TREATMENT METHODS ON MICROBIAL GROWTH IN WATER

2015 ◽  
Vol 2 ◽  
pp. 71
Author(s):  
Madars Reimanis ◽  
Jurijs Ozoliņš ◽  
Juris Mālers ◽  
Vizma Nikolajeva
Keyword(s):  
Organic Matter ◽  
Chemical Treatment ◽  
Microbial Growth ◽  
Sharp Decrease ◽  
Water Electrolysis ◽  
Bacteriostatic Effect ◽  
Bacterial Colony ◽  
Electrolysis Process ◽  
Physical Chemical ◽  
Colony Forming Units

Use of the TinO2n-1 electrode for water electrolysis process promotes the destruction of organic matter as shown by the changes in permanganate index different values of electrolysed and non electrolysed solution. Using the TinO2n-1 electrode in the electrolysis process with the presence of chlorine and bromine ions can create a lasting disinfectant effect that was demonstrated by the sharp decrease in the number of bacterial colony forming units in electrolysed solutions. Using the TinO2n-1 electrode in the electrolysis process with the presence of iodine ions can create a bacteriostatic effect which was maintained for at least 10 days in electrolysed solutions

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