Water electrolysisProducing one kilogram of hydrogen requires 56 kWh of electricity. Electrolysis of water to produce a standard cubic meter of hydrogen requires about 5 kilowatt hours of electricity. The calorific value of 1 kilogram of hydrogen is equivalent to approximately 33 kW/h (kWh) of electricity. The power generation efficiency of hydrogen fuel cells typically operates between 40% and 60%. Typically calculated based on 50% efficiency, 1 kilogram of hydrogen can produce electricity at around 16 degrees Celsius. 11.2 The standard cubic meter of hydrogen is equivalent to 1 kg. Therefore, the power consumption of water electrolysis to produce 1 kilogram of hydrogen is approximately 56 kilowatt hours.
Principle of hydrogen production by electrolysis of water:
When a direct current passes through certain electrolytic aqueous solutions, the substancesWhat decomposes is water as the solvent, and the original electrolyte remains in the water. For example, sulfuric acid, sodium hydroxide, potassium hydroxide, etc. all belong to this type of electrolytes. ?During water electrolysis, because the ionization degree of pure water is very low and its conductivity is low, it is a typical weak electrolyte. Therefore, it is necessary to add the aforementioned electrolyte to increase the conductivity of the solution so that water can. Be electrolyzed into hydrogen and oxygen smoothly.
Reference for the above content: Baidu Encyclopedia-Hydrogen Production by Water Electrolysis