Mainly used in industrial production and scientific research fields. In the chemical industry, hydrogen is widely used for the production of chemicals such as ammonia, methanol, and propylene; In the petroleum processing industry, hydrogen is used for hydrogenation desulfurization and gasoline cracking reactions; In the power industry, high-temperature hydrogen oxide fuel cells can use water and hydrogen to generate heat and electricity, reducing dependence on fossil fuels; There are also important applications in the fields of new energy vehicles, aerospace, and photovoltaics, such as hydrogen fuel cell vehicles using hydrogen as fuel to achieve zero emissions; The use of liquid hydrogen as rocket fuel in the aerospace field; Utilizing hydrogen for energy storage in the photovoltaic field