What is the purpose of adding acid during the electrolysis process? Why is it necessary to strictly control the amount of acid added? What is the control range?
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What is the purpose of adding acid during the electrolysis process? Why is it necessary to strictly control the amount of acid added? What is the control range?
This post was last edited by Du Xiaoping on 2016-9-10 at 16:40. The purpose of adding acid is to neutralize the hydroxide ions that penetrate from the cathode, reduce side reactions at the anode, improve gas purity, and enhance electrical efficiency. As specified by the Japanese company Asahi Kasei, the acidity level should be ≤0.15N on the inlet side and between 0.001–0.005N on the outlet side. If the acidity is too high, bubbles will form on the ion membrane, causing the membrane to become H+-laden; moreover, the sacrificial anodes located in the inlet pipes of the anode solution will be damaged and dissolved. If the acidity is too low, it will not achieve the desired effect.