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JYFQ-Hydrogen Generator
Jalier
China
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Electrolytic hydrogen production is a technology that converts electrical energy into hydrogen chemical energy by driving water molecules to undergo oxidation-reduction reactions at electrodes using direct current. This technology is categorized into various process pathways based on the type of electrolyte, including alkaline electrolysis, proton exchange membrane electrolysis, and solid oxide electrolysis, with conversion efficiencies reaching 75%-85%. Compared to traditional fossil fuel-based hydrogen production, electrolytic hydrogen production emits no pollutants such as sulfur oxides or nitrogen oxides throughout the entire process. When combined with renewable energy power generation technologies, it becomes a core component in establishing an “electricity-hydrogen-electricity” energy system.
In the electrolyzer, a direct current voltage drives water molecules to undergo electrochemical reactions:
Cathode reaction: 2H₂O + 2e⁻ → H₂↑ + 2OH⁻ (alkaline conditions)
Anode reaction: 4OH⁻ → O₂↑ + 2H₂O + 4e⁻ (alkaline conditions)
In proton exchange membrane electrolysis cells, water decomposes at the anode into O₂, H⁺, and electrons. H⁺ migrates through the membrane to the cathode, where it combines with electrons to form H₂. The entire process follows Faraday's law of electrolysis, with hydrogen production being directly proportional to current intensity.
Process Flow
Raw Water Treatment: Domestic water must undergo purification (such as distillation or deionization) to meet conductivity requirements.
Electrolysis Process: Direct current passes through the electrolysis cell, causing water molecules to decompose at the electrode surfaces. Hydrogen gas is released at the cathode, and oxygen gas is released at the anode. A membrane prevents the gases from mixing.
Gas Separation and Purification:
Separation: Hydrogen and oxygen are separated using a gas separator.
Purification: Hydrogen undergoes catalytic deoxygenation, cooling and dehumidification, and adsorption drying, achieving a purity of 99.999%.
Circulation System: Electrolyte (KOH) is recycled, with concentration and temperature maintained via an alkali solution cooler and filter.
Gas purity
Alkaline electrolysis: Hydrogen purity is typically 99.9% to 99.99%.
PEM electrolysis: Hydrogen purity can reach 99.999% or higher.
Operating conditions
Temperature: Alkaline electrolysis typically operates at 70–80°C, while PEM electrolysis operates at 60–70°C.
Pressure: Gas pressure is selected according to user requirements, typically 0.1–3.0 MPa
Electrolytic hydrogen production is a technology that converts electrical energy into hydrogen chemical energy by driving water molecules to undergo oxidation-reduction reactions at electrodes using direct current. This technology is categorized into various process pathways based on the type of electrolyte, including alkaline electrolysis, proton exchange membrane electrolysis, and solid oxide electrolysis, with conversion efficiencies reaching 75%-85%. Compared to traditional fossil fuel-based hydrogen production, electrolytic hydrogen production emits no pollutants such as sulfur oxides or nitrogen oxides throughout the entire process. When combined with renewable energy power generation technologies, it becomes a core component in establishing an “electricity-hydrogen-electricity” energy system.
In the electrolyzer, a direct current voltage drives water molecules to undergo electrochemical reactions:
Cathode reaction: 2H₂O + 2e⁻ → H₂↑ + 2OH⁻ (alkaline conditions)
Anode reaction: 4OH⁻ → O₂↑ + 2H₂O + 4e⁻ (alkaline conditions)
In proton exchange membrane electrolysis cells, water decomposes at the anode into O₂, H⁺, and electrons. H⁺ migrates through the membrane to the cathode, where it combines with electrons to form H₂. The entire process follows Faraday's law of electrolysis, with hydrogen production being directly proportional to current intensity.
Process Flow
Raw Water Treatment: Domestic water must undergo purification (such as distillation or deionization) to meet conductivity requirements.
Electrolysis Process: Direct current passes through the electrolysis cell, causing water molecules to decompose at the electrode surfaces. Hydrogen gas is released at the cathode, and oxygen gas is released at the anode. A membrane prevents the gases from mixing.
Gas Separation and Purification:
Separation: Hydrogen and oxygen are separated using a gas separator.
Purification: Hydrogen undergoes catalytic deoxygenation, cooling and dehumidification, and adsorption drying, achieving a purity of 99.999%.
Circulation System: Electrolyte (KOH) is recycled, with concentration and temperature maintained via an alkali solution cooler and filter.
Gas purity
Alkaline electrolysis: Hydrogen purity is typically 99.9% to 99.99%.
PEM electrolysis: Hydrogen purity can reach 99.999% or higher.
Operating conditions
Temperature: Alkaline electrolysis typically operates at 70–80°C, while PEM electrolysis operates at 60–70°C.
Pressure: Gas pressure is selected according to user requirements, typically 0.1–3.0 MPa
