Precautions for use of Asahi Kasei Electrolyser products
Asahi Kasei Electrolyser products The residence time of the electrolyte in the electrolytic cell not only affects the production capacity of the equipment, but also, in some cases, affects the current efficiency of the electrolysis process, such as the production of sodium chlorate by electrolysis, due to the intermediate product hypochlorous acid ( The chemical reaction speed between HClO) and hypochlorite ion (ClO3) is very slow. If it stays in the electrolytic cell for a long time, it will not only reduce the utilization rate of the electrolytic cell, but also the hypochlorite ion will oxidize on the anode surface or reduce on the cathode surface. , reducing the current efficiency. As a result, modern cell designs seek to reduce the volume and allow the electrolyte to flow rapidly along the electrodes. If further reactions are required, a separate chemical reactor can be installed outside the electrolysis cell.
The inner electrodes of Asahi Kasei Electrolyser products are more compact in vertical installation, easy to connect the conductive plates, and help to reduce the bubble effect. Because gas bubbles are often attached to the surface of the electrode with gas evolution, the working surface area of the electrode will be reduced. In addition, the solution near the electrode will also be filled with bubbles, increasing the resistance of the solution, a phenomenon called "bubble effect". However, in the vicinity of the vertical electrode surface, the characteristics of high aeration, low solution density and fast rising speed in the solution can be used to form a natural circulation of the electrolyte, so that the bubbles can accelerate away from the electrode surface and reduce the bubble effect. When the vertical electrode is used as a gas electrode, the shape of the electrode is mostly mesh, which not only increases the working surface area, but also facilitates the escape of air bubbles.
Asahi Kasei Electrolyser products materials can be steel, cement, ceramics, etc. Steel is alkali resistant and is the most widely used. For highly corrosive electrolytes, the inside of the steel tank is lined with lead, synthetic resin or rubber.
At present, electrolyzers are developing in the direction of large capacity and low energy consumption. The bipolar electrolyzer is suitable for large-scale production, and has been used in the electrolyzed water and chlor-alkali industries successively.
Water electrolysis hydrogen production electrolyzers mostly use iron as the cathode side and nickel as the anode side of the series electrolyzers (like a filter press) to electrolyze the aqueous solution of caustic potash or caustic soda. Oxygen from the anode and hydrogen from the cathode. The cost of this method is high, but the product purity is high, and hydrogen with a purity of more than 99.7% can be directly produced.