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[Chemical Knowledge]：Properties and Uses of Compressed Hydrogen

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The nature and use
of compressed hydrogen in the field of raw materials for chemical production
1. Introduction

hydrogen is a colorless, odorless, non-toxic diatomic gas with the molecular formula H2. It is gaseous at room temperature and pressure, but can be compressed to liquid under a certain pressure. As an important raw material for chemical production, compressed hydrogen is widely used in many industrial processes. The properties and uses of compressed hydrogen will be described in detail in this paper.

2. The nature of compressed hydrogen

1. Physical properties: hydrogen is gaseous at room temperature and pressure, colorless and transparent, odorless and non-toxic. Its density is very small, only 1/14 of the air. Hydrogen has a high degree of compressibility and can be compressed to a liquid state at high pressure.
2. Chemical properties: Hydrogen has a very strong reducibility and can react with many elements and compounds under certain conditions. For example, hydrogen can react with nitrogen at high temperature and high pressure to produce ammonia, react with oxygen to produce water, etc.

3. The production of compressed hydrogen

compressed hydrogen is mainly produced by the following methods:

1. Natural gas reforming: Natural gas reforming is a chemical reaction process that converts natural gas into hydrogen and carbon dioxide. Through the action of the catalyst, the methane in the natural gas reacts with water vapor or carbon dioxide to form hydrogen and carbon monoxide or carbon dioxide.
2. Water electrolysis: Water electrolysis is the process of hydrogen and oxygen by electrolyzing water. In the electrolyser, water is decomposed into hydrogen and oxygen by direct current. The hydrogen is produced at the cathode and the oxygen is produced at the anode.

4. the use of compressed hydrogen

compressed hydrogen as an important chemical raw material, has the following wide range of uses:

1. chemical production: hydrogen in chemical production as a reducing agent, dehydrogenation agent, hydrogenation agent and so on. For example, in the process of oil hydrogenation, hydrogen reacts with unsaturated fatty acids to produce saturated fatty acids, which improves the stability and shelf life of oils.
2. Petroleum processing: In petroleum processing, hydrogen is used to improve oil quality and remove impurities. Through the hydrogenation reaction, impurities such as sulfur and nitrogen in the oil can be removed, and the combustion performance and stability of the oil can be improved.
3. Metallurgical industry: In the metallurgical industry, hydrogen is used as a reducing agent for the extraction of metals and the preparation of metal compounds. For example, in the preparation of metals such as titanium and zirconium, hydrogen is used as a reducing agent to reduce metal oxides to elemental metals.
4. Electronics manufacturing: Hydrogen is used as a cleaning agent and reducing agent in electronics manufacturing. In semiconductor manufacturing processes, hydrogen is used to clean the surface of silicon wafers and remove oxides.
5. Energy storage: As a clean energy source, hydrogen can be used to store energy. During the peak period of renewable energy power generation, excess electricity can be used for water electrolysis to produce hydrogen and store energy as hydrogen; during the low period of power generation, hydrogen is converted into electricity to meet energy demand.

5. conclusion

compressed hydrogen as an important raw material for chemical production has a wide range of uses. With the continuous development of science and technology, the application field of hydrogen will be further expanded, providing more raw materials and support for chemical production, petroleum processing, metallurgical industry, electronic product manufacturing and energy storage.

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