Here are some things to consider when installing and operating an alkaline electrolyzer:
Electrolyte
The electrolyzer contains an alkaline solution, usually potassium hydroxide (KOH) or sodium hydroxide (NaOH), between two electrodes. The concentration of the solution is typically 25–30%.
Diaphragm
A porous diaphragm separates the hydrogen and oxygen. The diaphragm is usually made of chrysotile asbestos.
Electrode reactions
At the cathode, water is split to form hydrogen and release hydroxide ions. The hydroxide ions pass through the diaphragm and are converted into oxygen at the anode.
Gases
The product gases are conditioned and purified to meet the user's needs.
Inputs
The only inputs required to operate an alkaline water electrolyzer plant are demineralized water, electricity, and chilled water.
Temperature and pressure
Alkaline electrolyzers are typically operated at temperatures between 50–80°C and pressures up to 30 bar.
Cabling
The cabling between the control panel and the electrolyzer must consider the safe area and hazardous area distances.
Control panel
If the electrical and electronics parts are to be maintained, the control panel should be housed with air conditioners.
Alkaline water electrolysis is a mature and simple method for producing hydrogen and oxygen. It's the most widely used type of electrolyzer and has the greatest commercial reach.
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