The role of introducing air into chlor-alkali processes
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What is the purpose of introducing air in the chlor-alkali industry? ? Reduce hydrogen evolution? ?
How much oxygen is required for this technology? ? What was it originally? ? Will oxygen reach the cathode when dilute brine is electrolyzed? ? ?
Most of them nowadays are bipolar zero-gap electrolyzers, with chlorine being produced at the anode and hydrogen and alkali at the cathode. As for the manufacturing process and related parameters, you need to refer to the technical documents provided by the supplier, such as the process specifications, and you can also consult the experts at the factory.
Oxygen cathode technology was first developed by Germans in the laboratory. Beihua Machinery later conducted experiments at the Huanghua Chlor-Alkali Plant. The key aspect of the oxygen cathode is that it divides the cathode into two chambers, adding an oxygen chamber. No hydrogen is produced at the cathode, thus there is no hydrogen evolution potential, reducing power consumption. The bottleneck restricting this technology is the issue of cathode coating materials. In short, the oxygen cathode is the trend for the future development of the chlor-alkali industry.