The electrolysis of water to produce one kilogram of hydrogen requires 56 kWh of electricity. Electrolysis of water to produce a standard cubic meter of hydrogen requires approximately 5 kWh 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 is passed through certain electrolytic aqueous solutions, the substances decomposed don't have rhas nothing to do with the What decomposes is water as a 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
1 According to the query of the Chemical Industry Network, cesium metal can greatly improve water quality. electrochemical performance of electrolysis of hydrogen production. and stability, at 650℃, 1.3V, in hyd production moderogen by electrolysis of water, the current density reaches 2.85 amps per square centimeter. Compared with the current density of 0.5-1.5 amps per square centimeter of traditional hydrogen production technology, the current density has increased by more than 2 times. It is expected to significantly reduce the material and production costs of electrolytic cells and extend the service life.
2. The new cesium-doped electrode material has very high electrochemical reactivity, allowing the electrolysis process to operate in medium and low temperature environments, thereby significantly reducing operating costs.