The hydrogen energy awareness and understanding, talk about the current methods and principles of hydrogen preparation

Combined with the knowledge and understanding of hydrogen energy, talk about the current hydrogen preparation methods and principles are as follows:

The government and enterprises are actively involved in the layout of the hydrogen energy, the hydrogen energy technology chain is gradually complete and perfect, the hydrogen energy industry chain is also being gradually formed, the "Hydrogen Energy China" strategy has been The formation of a complete hydrogen energy industry chain will inevitably include hydrogen production, hydrogen storage, hydrogen transportation, hydrogen refueling, hydrogen use and other links. As the leader of the hydrogen energy industry chain, hydrogen production technology is particularly important. There are many methods of hydrogen production.

1, electrolysis of water to produce hydrogen

Electrolysis of water to produce hydrogen is a relatively simple method, you can use the electrode plate or electrolysis tank for electrolysis, the specific reaction formula for 2H2O + 2e- → H2↑ + 2OH-. This method is the most commonly used method, and it does not produce any pollutants and has a wide range of applications. The hydrogen produced by this method is pure, but it consumes a lot of electricity and is costly.

2. Hydrogen Production from Fossil Feedstocks

Fossil feedstocks mainly refer to natural gas, oil and coal, while others include shale gas and combustible ice. The main component of natural gas, shale gas and combustible ice is methane. Hydrogen production by methane water vapor reforming is the most widely used hydrogen production technology. Under high temperature and pressure, methane and water vapor react to produce a synthesis gas containing hydrogen and carbon monoxide, which is then purified by water vapor conversion and purification to produce hydrogen.

This method produces a large amount of hydrogen, but produces greenhouse gases such as carbon dioxide.

3, coal hydrogen

To coal gasification under steam conditions to produce syngas containing hydrogen and carbon monoxide, syngas by conversion and separation of hydrogen. This method utilizes the country's abundant coal resources, but also produces large amounts of carbon dioxide and other pollutants.

4, biomass hydrogen

refers to the biomass through gasification and microbial catalytic dehydrogenation method of hydrogen production, in the physiological metabolism of molecular hydrogen produced during the process of the process of the collective term. This method utilizes renewable biological resources, but the technology is immature, with low yields and high costs.

5, new hydrogen production methods

Including photochemical hydrogen production, thermochemical hydrogen production, solar photocatalytic decomposition of water to produce hydrogen and other technologies. These methods utilize clean energy such as solar energy, but are still in the experimental and development stage, and have not yet reached the industrial scale hydrogen production requirements. There are many ways to produce hydrogen, and each method has advantages and disadvantages, so it is important to choose the right method for different situations.