The calorific value of hydrogen is 3 times that of gasoline and 4.5 times that of coke. After chemical reaction, only water without environmental pollution is produced. Hydrogen energy is a secondary energy, which needs to consume primary energy to produce hydrogen. The main ways to obtain hydrogen are hydrogen production from fossil energy and hydrogen production from renewable energy
At present, domestic hydrogen production mainly relies on fossil energy, and the proportion of hydrogen production from electrolytic water is very limited. With the development of hydrogen storage technology and the decrease of construction cost, the scale of hydrogen production from renewable energy such as wind and light will be larger and larger in the future, and the hydrogen energy structure in China will be cleaner and cleaner.
Generally speaking, fuel cell stack and key materials restrict the development of hydrogen energy in China. Compared with the advanced level, the power density, system power and service life of domestic stack still lag behind; Proton exchange membrane, catalyst, membrane electrode and other key materials, as well as high pressure ratio air compressor, hydrogen circulation pump and other key equipment rely on imports, and the product price is high
Therefore, China needs to pay attention to the breakthrough of core materials and key technologies to make up for the shortcomings
Key technologies of hydrogen energy storage system
The hydrogen energy storage system can make use of the surplus electric energy of new energy to produce hydrogen, store it or use it for downstream industry; When the load of the power system increases, the stored hydrogen energy can be generated by fuel cells and fed back to the grid, and the process is clean, efficient and flexible. At present, the key technologies of hydrogen energy storage system mainly include hydrogen production, hydrogen storage and transportation, and fuel cell technology.
By 2030, the number of fuel cell vehicles in China is expected to reach 2 million.
Using renewable energy to generate “green hydrogen” can supply the surplus hydrogen energy to hydrogen fuel cell vehicles, which not only promotes the coordinated development of renewable energy and hydrogen energy storage system, but also realizes the green environmental protection and zero emission of vehicles.
Through the layout and development of hydrogen energy transportation, promote the localization of key materials and core components of fuel cells, and promote the rapid development of hydrogen energy industry chain.
Post time: Jul-15-2021