Alkaline Water Electrolysis Manufacturer
Alkaline Water Electrolysis is a mature and widely adopted technology for producing hydrogen gas by splitting water molecules using an alkaline electrolyte and electricity. This method uses a solution of potassium hydroxide (KOH) or sodium hydroxide (NaOH) as the conductive medium and operates under relatively low temperatures (60–80°C).
This process is known for its reliability, scalability, and cost-effectiveness, making it a cornerstone for green hydrogen production, especially when powered by renewable energy sources.
Working Principle of Alkaline Water Electrolysis
Water + Alkaline Electrolyte Input
- A mixture of water and alkaline solution (KOH/NaOH) is circulated into the electrolyzer.
Electric Current Application
- A direct current (DC) is applied across two electrodes: the anode (positive) and cathode (negative), separated by a diaphragm to prevent gas mixing.
Electrochemical Reaction
- At the cathode (-): 2H₂O + 2e⁻ → H₂ (gas) + 2OH⁻ At the anode (+): 2OH⁻ → ½O₂ (gas) + H₂O + 2e⁻
Gas Separation & Collection
- Hydrogen and oxygen gases are separately collected and passed through gas-liquid separators.
Key Advantages of Alkaline Water Electrolysis
- Proven Technology: Alkaline water electrolysis has a long industrial history and is well-established for large-scale hydrogen production.
- Cost-Effective : It uses non-precious metal catalysts (like nickel) and less expensive materials, resulting in lower capital and operational costs compared to other electrolysis technologies.
- Scalability : The technology is suitable for both small and large-scale hydrogen generation, making it adaptable to various industrial needs.
- High Efficiency : Modern alkaline electrolyzers can achieve competitive or even superior efficiencies compared to newer technologies, especially when optimized with advanced catalysts.
- Long Lifespan: Robust construction and durable materials contribute to long operational life and reduced maintenance requirements.
- Lower Water Purity Requirements : Alkaline systems tolerate less pure water than PEM electrolyzers, reducing pre-treatment costs.
- Safe Operation: The use of a diaphragm or separator prevents mixing of hydrogen and oxygen gases, enhancing safety.
