Optimal electrolysis temperature for the electrolyzer
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This post was last edited by paul2100 on 2015-8-13 22:13. Assuming a certain current density, such as 5.5 KA/㎡, what should be the optimal electrolysis temperature for the electrolyzer? For DuPont membranes, Asahi Kasei membranes, and Asahi Glass membranes, could the optimal electrolysis temperature vary among them?
This post was last edited by Du Xiaoping on 2015-8-13 at 23:14. Generally, manufacturers provide the electrical density and temperature under standard conditions; these values may vary slightly depending on the type of cell. I have worked with two types: one manufactured by Beihua Machinery, where the pole distance is specified, with the anode and cathode pressures controlled at 40 and 44 kPa respectively, and the cell temperature kept around 90°C. The other type is manufactured by Asahi Kasei, without a specified pole distance, with the anode and cathode pressures controlled at 20 and 24 kPa respectively, and the temperature maintained around 87°C.
Both ion membrane manufacturers and electrolyzer manufacturers provide recommended operating conditions; as long as the operation is within these ranges, it is advisable to keep the temperature at its upper limit, as this helps save electricity.
As the current density increases, the slot temperature also rises accordingly. It is generally between 81 and 89 degrees Celsius.
Around 87 degrees; by observing the changes in slot pressure at different temperatures, it can be seen that in practice, higher temperatures do not necessarily result in lower slot pressure
Woody cell DuPont membrane, 5KA/㎡ temperature 88℃
The temperature is 85–88°C, but the temperature of the membrane electrode assembly in the electrolyzer is relatively low, around 82°C. Our company has not deliberately increased the operating temperature; I wonder how other companies handle this situation
Try to raise the temperature to the required level. How is the saltwater temperature controlled?
The temperature of the saltwater is 60°C; if the temperature of the electrolytic cell rises, steam from the catholyte liquid is needed for heating.
It is also possible to heat the catholyte using steam; in addition, there is room to increase the temperature of the saltwater as well.
We keep the temperature of the saltwater between 61 and 62 degrees. The temperature in the Asahi Kasei zero-gap cell reaches up to 87 degrees. Circulating water is used in the E-273 unit, but the amount of alkaline solution that requires heat exchange is not large; the opening degree of TCV-273A is around 5%