How is hydrogen energy developed and utilized?

Hydrogen energy is a secondary energy source, which is produced by using other energy sources in a certain way, unlike coal, oil, and natural gas, which can be extracted directly from the ground and rely almost entirely on fossil fuels. As fossil fuels are consumed more and more, their reserves are dwindling, and one day these resources will be exhausted, making it urgent to find a new energy source with abundant reserves that does not rely on fossil fuels. Hydrogen is just such a new secondary energy source that people are looking forward to at the same time as the emergence of the conventional energy crisis and the development of new secondary energy sources. Hydrogen is located at the top of the periodic table, atomic number 1, gaseous at room temperature and pressure, and liquid at ultra-low temperature and high pressure.

Hydrogen has a wide range of uses and is highly applicable. It can not only be used as a fuel, and metal hydride with chemical energy, thermal energy and mechanical energy conversion function. For example, the hydrogen storage metal has the ability to absorb hydrogen and heat release and heat release hydrogen, can be stored as heat, as the room heating and air conditioning use.

Hydrogen as a gaseous fuel was first used in automobiles. in May 1976, the United States developed a hydrogen-fueled car; later, Japan also successfully developed a liquid hydrogen-fueled car; in the late 1970s, Mercedes-Benz of the former Federal Republic of Germany had tested hydrogen, and they used only 500 grams of hydrogen to make the car travel 110 kilometers. The use of hydrogen as automobile fuel is not only clean and easy to start at low temperatures, but also has a small corrosive effect on the engine, which can extend the service life of the engine. Since hydrogen and air can be evenly mixed, the carburetor used in general automobiles can be completely eliminated, thus simplifying the construction of existing automobiles. What is more interesting is that as long as 4% of hydrogen is added to gasoline. With it as a car engine fuel, you can save 40%, and do not have to make much improvement to the gasoline engine. Hydrogen can be easily turned into a liquid at a certain pressure and temperature, so it can be easily transported in tank cars, highway trailers, or by ship. Liquid hydrogen can be used as fuel for cars and airplanes as well as rockets and missiles. The United States flew to the moon "Apollo" spacecraft and China's launch of artificial satellites of the Long March launch vehicle, are using liquid hydrogen as fuel.