China's fuel cell infrastructure construction has entered an accelerated period, making full preparations for the commercialization of fuel cell vehicles. Hydrogenation infrastructure is an important guarantee for the development of fuel cells. Low cost transportation of hydrogen is also a problem that needs to be solved. High purity hydrogen sources suitable for fuel cell vehicles are also important issues.

Next, let's follow the Chengdu hydrogen production plant manufacturer to understand the above methods and principles of industrial hydrogen production:

Industrial hydrogen production includes many methods, but each has its own advantages and limitations. The traditional hydrogen production methods are mainly hydrogen production by electrolysis of water and hydrogen production by mineral fuels. Hydrogen production by electrolysis of water not only consumes large energy, but also has high cost. Under standard conditions, the electricity consumption for preparing hydrogen per cubic meter is as high as 5.5kW · h, and the hydrogen production cost is high. Hydrogen production from fossil fuels requires high reaction heat from the outside world. While a large amount of chemical energy is lost, it also brings about greenhouse gas CO2 emissions.

Numerous industrial hydrogen production methods

Hydrogen is not only an important industrial raw material and reductant, but also an essential fuel for fuel cells. With the promotion and popularization of fuel cells, fuel cell vehicles have entered the mature market, and the hydrogen consumption will also increase at an alarming rate. At present, there are several main methods for industrial hydrogen production: first, hydrogen production from fossil fuels; Second, hydrogen is extracted from chemical by-products; The third is to use methanol and methane from living things to produce hydrogen, and the fourth is to use solar energy, wind energy and other natural energy for water electrolysis.

1. Hydrogen production from fossil fuels

Hydrogen production from fossil fuels is a traditional hydrogen production method and an old hydrogen production process, but it still relies on fossil fuels and emits greenhouse gases such as carbon dioxide, which reduces the environmental value of fuel cells. The fossil fuel commonly used for hydrogen production is natural gas. The process of hydrogen production from natural gas is that under certain pressure, high temperature and catalyst, alkanes in natural gas react with water vapor. The conversion gas is transferred into the shift furnace after heat exchange in the boiler to convert C0 into H2 and CO2. After heat exchange, condensation and steam water separation, the gas is sequentially passed through the adsorption tower equipped with three kinds of specific adsorbents through program control, and N2, CO, CH4 and CO2 are adsorbed by pressure swing adsorption (PSA) to extract product hydrogen.

2. Hydrogen production from industrial by-products

The hydrogen production technology from coke oven gas is to extract pure hydrogen from coke oven gas, a by-product of coking industry, by means of pressure swing adsorption process. Its basic principle is to realize the separation of gas mixture and the regeneration of adsorbent by utilizing the characteristics that solid adsorbent has selectivity for gas adsorption and the adsorption amount of gas on the adsorbent decreases with the decrease of its partial pressure, so as to achieve the purpose of hydrogen purification.

3. Methanol reforming for hydrogen production

Methanol steam reforming is a hydrogen production technology rising in the 1980s abroad. Canada, Britain, Australia, etc. have carried out a lot of research in this field. After decades of in-depth research, Guangdong Hezide Energy Technology Co., Ltd. has found that the hydrogen production process is very mature and is a pioneer in small-scale mobile methanol hydrogen production in China. It has highly integrated this technology with fuel cell power generation technology and successfully applied it in new energy vehicles, communication base stations and other fields, with very good application prospects.

4. Hydrogen production by electrolysis of water

Hydrogen can also be obtained through the traditional electrolytic water method. However, due to the high energy consumption of this method, there are few new units except the built ones.

The above methods and principles of industrial hydrogen production are shared by Chengdu Kete Ruixing Technology Co., Ltd., hoping to be helpful.