1、 Manufacturing

Technically, hydrogen manufacturing process mainly uses various energy sources to decompose hydrogen from hydrogen containing compounds. No matter how it is decomposed, it always needs to consume a certain amount of energy. Chengdu hydrogen production unit technologies mainly include the following.

Hydrogen production from hydrocarbons

Hydrogen production from coal

Nuclear hydrogen production

Hydrogen production from wind energy

Hydrogen production by thermochemical biological process

Solar hydrogen production

2、 Storage

Compressed gas: fiber composite carbon fiber storage bin, which can store 350 to 700 bar compressed hydrogen.

Liquid hydrogen: The technical problems in the design of liquid hydrogen storage mainly include the energy consumption of the hydrogen liquefaction station and the thermal insulation process of the storage equipment. For the storage of liquid hydrogen, the temperature in the cabin shall not be higher than - 253 ℃, which is difficult for long-term storage. For example, the BMW Hydrogen 7 cryogenic storage system can effectively store liquid hydrogen for no more than two weeks.

Metal hydride: under normal temperature or higher temperature, metal hydride has the characteristics of absorbing and releasing hydrogen. Generally speaking, the hydrogen absorbed by metal hydride shall not exceed 7% of its own weight. In addition, the hydrogen storage capacity of metal hydride will be lost due to process pollution.

Organic hydride: Like decalin, the hydrogen storage ratio can reach 7.3wt%, i.e. 64.8 kg/m ^ 3. However, dehydrogenation devices required for hydrogen release from organic hydrides are not easy to be used in vehicles, ships and other vehicles.

Hydrogen storage by graphite, fullerene, nanotube and activated carbon: single-layer carbon nanotube can store 2.5 to 3wt% hydrogen. At present, the research in this field mainly focuses on the manufacturing process of special carbon materials and cost reduction.

Hydrogen storage by hollow silica particles. At high temperature, the wall mass of hollow silica microspheres can penetrate hydrogen. With the temperature decreasing, silica can seal hydrogen inside the particles. When hydrogen is needed, it can be heated to release hydrogen.