Hydrogen is the most abundant element in the universe, making up 75% of the mass of the universe, the third most abundant on Earth, and its large reserves ensure its sufficiency as an energy supply. Hydrogen is mainly in the form of water, and raw materials are very easy to obtain. In addition, hydrogen energy supply mainly reacts with oxygen to generate water and release chemical energy, and its product has no other intermediate products except water. There is no waste and zero pollution in the whole energy supply process. It is also the key development direction to promote the green and low-carbon target of the energy system. With the increasing attention to the development of green economy worldwide, the demand and application fields of hydrogen energy continue to expand, and hydrogen energy is known as the new energy in the 21st century. From the upstream and downstream of the hydrogen energy industry chain, the upstream of the hydrogen energy industry chain is hydrogen production. It includes hydrogen production (the main technical methods include coal hydrogen production, industrial by-product hydrogen production, natural gas hydrogen production, electrolytic water hydrogen production and other processes), hydrogen purification, hydrogen liquefaction and other links. The main storage and transportation technologies include gaseous storage and transportation, liquid storage and transportation, solid storage and transportation, and organic liquid storage and transportation, covering hydrogen storage devices, hydrogen transportation, etc. The downstream of the hydrogen energy industry chain is the comprehensive application of hydrogenation and hydrogen. Related to hydrogen refueling stations and equipment, as well as transportation, industrial, construction applications.
Currently, 96 percent of hydrogen is produced from fossil fuels through steam methane reforming (SMR) or coal gasification. The hydrogen produced by this process has a low cost, but the highest carbon intensity, and in the production and manufacturing process of hydrogen, accompanied by coal energy, oil energy consumption and a large number of carbon emissions, the hydrogen produced in this way is called "gray hydrogen".
Steam methane reforming or coal gasification plus carbon capture and storage (CCS) for hydrogen production is less carbon intensive and more expensive. Although advanced carbon capture technology is used to reduce carbon dioxide emissions to the atmosphere in the production process, a large amount of carbon dioxide will still be emitted to the atmosphere through various ways in the terminal link, but the emissions have been reduced to a certain extent, and the hydrogen produced in this way is called "blue hydrogen".
The use of renewable energy sources, such as solar energy, wind energy, tidal energy, electrolysis of water to produce hydrogen, or in the production and process of electric energy, the excessive production of electric energy uses hydrogen as an energy storage carrier, and truly achieve zero carbon dioxide emissions in the manufacturing and storage process. Hydrogen produced in this way to achieve a true green cycle, social acceptance is high, can be called "green hydrogen".
Sustainable green energy is one of the main ways to produce and use energy in the world in the future, and Hegeking Valley attaches great importance to the development trend of hydrogen energy and participates in the blueprint construction of the future "hydrogen" world. In the hydrogen energy industry chain, Hegekingu focuses on hydrogen purification technology, research and development of liquid hydrogen and high-pressure gaseous hydrogen and solid metal hydrogen storage technology, and has made a number of patent applications. Hydrogen purification is suitable for non-electrolytic gray hydrogen and blue hydrogen purification to meet the high purity hydrogen used in fuel cells through purification. China's industrial hydrogen production is huge, make full use of existing hydrogen resources to support the development of hydrogen energy in the transportation industry has a very practical significance, hydrogen purification technology has the following technical methods: pressure swing adsorption method, low temperature separation method, metal film diffusion method, polymer film diffusion method, catalytic deoxidation method, metal hydride method and so on. The hydrogen purification method or purification combination method is different for different purity grades of raw hydrogen, and the correct purification method is the basis to ensure the quality of hydrogen after purification.