Manufacturing Method of Compressed Hydrogen
I. Introduction
Hydrogen is a colorless, odorless and non-toxic gas with high reactivity, so it has a wide range of applications in the field of raw materials for the production of chemicals. As an important industrial gas, compressed hydrogen is widely used in the production of chemical products such as ammonia and methanol, and also plays an important role in the fields of energy, metallurgy and electronics. In this paper, we will introduce the manufacturing methods of compressed hydrogen, including electrolysis of water, natural gas reforming method, coal hydrogen production method and so on.
II. Water Electrolysis Method
Electrolysis of water is a commonly used method of hydrogen production, the principle of which is to decompose water into hydrogen and oxygen through electrolysis. The method has the advantages of high purity and no pollution, but the energy consumption is high, so the cost and benefit need to be considered comprehensively in the actual production. The process flow of
electrolysis water method is as follows: firstly, water is added into the electrolyzer, and the water is decomposed into hydrogen and oxygen by energizing action; then, the hydrogen and oxygen are separated by the separating device, and collected and stored separately. The hydrogen obtained by electrolysis of water is of high purity and can reach over 99.99%.
Three, natural gas reforming method
Natural gas reforming method is a commonly used method to produce hydrogen, the principle is to make natural gas react with water vapor under high temperature and high pressure to produce a mixture of hydrogen and carbon dioxide. The method has the advantages of high yield and low cost, but the carbon dioxide produced needs to be treated to avoid pollution to the environment. The process of
natural gas reforming method is as follows: first, natural gas and water vapor are mixed and introduced into a reactor to carry out the reaction under high temperature and high pressure; then, the generated hydrogen and carbon dioxide mixture is separated by a separation device to obtain hydrogen with higher purity. Natural gas reforming method of hydrogen purity is generally above 90%.
Four, coal hydrogen method
Coal hydrogen method is a commonly used method to produce hydrogen, the principle is to make coal react with water vapor under high temperature and high pressure to produce a mixture of hydrogen and carbon monoxide. The method has the advantages of wide source of raw materials and low cost, but the waste gas generated needs to be treated to avoid pollution to the environment. The process flow of
Coal-to-Hydrogen method is as follows: firstly, coal is crushed and mixed with water vapor and introduced into the reactor, and the reaction is carried out under high temperature and high pressure; then, the generated mixture of hydrogen and carbon monoxide is separated by the separating device, and the hydrogen gas with higher purity is obtained. The purity of hydrogen obtained by the coal-to-hydrogen method is generally above 70%.
V. Other methods
In addition to the above methods, there are some other methods to produce hydrogen, such as biomass gasification method, solar photolysis method. These methods have their own advantages and disadvantages, and need to be selected according to the actual situation.
VI.CONCLUSION
There are various methods of manufacturing compressed hydrogen, including electrolysis of water, natural gas reforming method, coal hydrogen production method, and so on. Different methods have different advantages and disadvantages and scope of application, and need to be selected according to the actual situation. In actual production, the most suitable manufacturing method needs to be selected by comprehensively considering factors such as cost, benefit and environment. Meanwhile, with the continuous progress and application of technology, more efficient and environmentally friendly manufacturing methods may appear in the future.
