Hydrogen occurs primarily on Earth in the form of compounds. It is the most widely distributed matter in the universe. It constitutes 75% of the mass of the universe and is secondary energy. In the 21st century, hydrogen energy may become an important energy source on the world energy stage. Hydrogen production, storage, transportation and application technology will also become the focus of attention in the 21st century.
Hydrogen has the characteristics of high combustion calorific value, which is 3.9 times that of gasoline, alcohol and coke. The product of hydrogen combustion is water, the cleanest energy source in the world. Hydrogen is rich in resources and sustainable development.
With people's attention to the search for new "energy-containing energy", electricity as secondary energy can be produced from various primary energy sources, such as coal, oil, natural gas, solar energy, wind energy, hydropower, tidal energy, land Thermal energy, nuclear fuel, etc. As secondary energy sources, gasoline and diesel rely almost entirely on fossil fuels. With the ever-increasing consumption of fossil fuels, these resources will one day be depleted, so there is an urgent need to find a new energy source that does not depend on fossil fuels. Gasoline and diesel as secondary energy sources are almost entirely dependent on the production of secondary energy sources. With the increase in fossil fuel consumption, production is almost entirely dependent on the increase in secondary fuel consumption, and secondary energy consumption will be in urgent need of development.
