water electrolysis hydrogen production



At present, to obtain hydrogen in industrial production, the following methods are usually used: First: Hydrogen is obtained by passing steam through hot coke, but the hydrogen obtained in this way is usually only 75% pure. Second: Pass the steam through the hot iron to get hydrogen. The purity of the hydrogen obtained by this method is relatively higher, about 97% purity. Third: The hydrogen is extracted by water gas. The purity is also quite low, so few people use this method to obtain hydrogen. Fourth: water electrolysis to produce hydrogen. Hydrogen production by water electrolysis is currently the most widely used method in the industry. At the same time, the purity is also the highest method. The purity can reach more than 99%, which is an important method for the industrial production of hydrogen. When the sodium hydroxide (potassium) solution is electrolyzed, oxygen is released on the anode and hydrogen is released on the cathode. When sodium hydroxide is produced by electrolytic sodium chloride aqueous solution, hydrogen can also be obtained.



 
Water electrolysis hydrogen production methods have relatively high requirements on the hydrogen and purity of cooling generators. Therefore, they are produced by electrolyzing water.
 
Principle of Hydrogen Production by Electrolyzed Water
The principle of hydrogen production by water electrolysis is very simple, which is to decompose water into hydrogen and oxygen by electricity. The specific method is: when direct current is passed into some electrolyte aqueous solutions, the decomposed substances have nothing to do with the original electrolyte and are decomposed. It is water as a solvent, and the original electrolyte remains in the water. For example, sulfuric acid, sodium hydroxide, potassium hydroxide, etc. belong to this type of electrolyte.
 
When electrolyzing water, pure water has a low degree of ionization and low conductivity, which is a typical weak electrolyte. Therefore, the aforementioned electrolyte needs to be added to increase the conductivity of the solution, so that the water can be electrolyzed into hydrogen and oxygen smoothly.