I have a question regarding current efficiency
Thread Content
This post was last edited by sunjl1981 on 2013-1-6 at 23:54. How is current efficiency calculated? It’s done as follows: the number of electrons transferred is determined from the amount of product obtained, then the charge amount is calculated; subsequently, the electrical energy consumed is found using Coulomb’s law, W=UQ. The kilowatt-hours shown on the meter are then used to calculate current efficiency. Is that right? (Personally, I’m not sure whether Coulomb’s law can be applied in this method, and voltage isn’t either a fixed factor.) Are there any other methods? # ， ， &
Generally, the cathode current efficiency can be calculated with relatively high accuracy, whereas the anode current efficiency has larger errors due to the many factors involved. Cathode current efficiency can be understood as the ratio of all electrical energy consumed to the useful electrical energy used for producing alkali. Therefore, I believe Coulomb’s law can be used, but in practical calculations it is best not to use the instantaneous voltage, as this will result in significant errors; since the voltage and current in any power grid are not constant. It is better to use the data from the total energy meter over the duration of the calculation. Additionally, the amount of base must be accurate and correspond to the calculated time period.
Please refer to the book \"Ion-Exchange Membrane Caustic Soda Production Technology\" edited by Cheng Dianbin; it contains very detailed calculation methods, covering cathode efficiency and anode efficiency, as well as examples of current efficiency calculations provided by various electrolyzer manufacturers. If you don’t have this book, you can download it from forums. :P