Hydrogen Generator

Hydrogen generators use electrolytic dissociation of water to generate a continuous supply of high purity hydrogen. Water purity is important for their optimal performance.

The following contaminants should be avoided:
Ions
Ions present in the water may interfere with the electrolysis process, and damage the electrochemical cells. They should be avoided. Ion exchange resins and/or reverse osmosis technologies can remove most of the ions present in tap water, making water suitable for this application.

Particles
Particles may deposit on lines and membranes, damage the electrochemical cells and interfere with the functioning of the instrument.

Organics
High loads of organics could potentially create deposits on the surface of the electrodes or form a coating on the membranes, and thus impact the local current. In addition, organic compounds can be used as nutrients by bacteria, and should therefore be kept to a minimum.

Bacteria
Bacteria levels should be kept to a minimum, to prevent the formation of biofilm inside the instrument. bacteria levels can be minimized by controlling the levels of organics present in the water. Filtration may also be used.

Users of hydrogen generators should follow manufacturer recommendations regarding the water quality required for their instruments. Water quality is important for the optimal operation of hydrogen generators, and some instruments have built-in resistivity or conductivity meters to help prevent damage to the instrument due to improper water quality. Freshly purified water, with a resistivity at or above 1 MΩ.cm is usually recommended.

Production of hydrogen through hydrogen generators is emerging as one of the key options for storing energy from water and fossil fuels. Hydrogen gas is now being used in few vehicles as a pollution free fuel with the gas being generated from water with the by-product of its combustion being water. Thus, hydrogen production is likely to play an important role in tackling critical energy challenges.
Now this technology is also used in various applications like fuel cells, chemical processing, refining, petroleum recovery and so on.

Constant research and development has afforded the innovation of hydrogen generators that are safer, greener, more efficient, and more cost effective means of generating on-demand hydrogen gas than high pressure cylinders for end use applications.

The major component of a hydrogen generator is its electrolyser cell that includes two electrodes i.e. an anode and a cathode. Both the electrodes are separated by the ion exchange membrane. A platinum catalyst is used at the electrodes to perform the electrolysis process. Liquid ammonia is the raw material used in hydrogen generator. After vaporization, activated nickel catalyst is installed in the decomposition boiler. Once the heat exchange is done, the decomposed gas cools down, the gas ammonia gets recovered from the heat and enters the decomposition boiler for decomposition. A mixed gas is generated which usually enters for gas purification system to get rid of moisture & other impurities. In this way, hydrogen is generated.

Even though hydrogen energy storage is more expensive than fossil fuels due to its higher density, rise in awareness among people around the world regarding eco-friendly and zero emission vehicles is boosting the demand of hydrogen. The Asia-Pacific region is currently holding the highest market share, owing to a lot of factors such as surge in demand for fuel cells in the automobile industry, increase in demand for various ammonia fertilizers and more.

Also, temporary closure of production facilities hampered the growth of the hydrogen generator market to an extent. On the other hand, demand for continuous energy in hospitals, especially during the initial period of the pandemic, has driven the demand for hydrogen fuel cells, thereby impacted the hydrogen generator market positively.

Furthermore, requirement for numerous chemical raw materials in several industries provide lucrative opportunities for the growth of the hydrogen generator industry. Rapid development in technologies and electrical efficiency of hydrogen generators are going to gather huge prospects and exponential growth to the market in the near future

A hydrogen generator is a device used to generate hydrogen gas (H2), and its working principle is based on the reaction of electrolytic water. The following is the working principle and function of the hydrogen generator:

Working principle
The working principle of a hydrogen generator mainly involves water electrolysis reaction. Usually, water (H2O) is composed of hydrogen (H2) and oxygen (O2), while the process of electrolysis of water decomposes it into hydrogen and oxygen. The specific reaction equation is as follows:

2H2O (liquid) ->2H2 (gas)+O2 (gas)
In a hydrogen generator, an electrolytic cell is generally used, which includes two electrodes: an anode and a cathode. These two electrodes are immersed in an electrolyte solution, usually an alkaline (such as sodium hydroxide) or acidic (such as sulfuric acid) solution.
When an external power source (usually a DC power source) is connected to the electrodes of the electrolytic cell, the following two reactions occur:

On the cathode, water molecules (H2O) receive electrons and are reduced to hydrogen gas (H2)
2H2O (liquid)+2 electrons ->H2 (gas)+2 hydroxide ions (2OH -)
On the anode, water molecules lose electrons and oxygen (O2) is released:
2H2O (liquid) ->O2 (gas)+4 hydrogen ions (4H+)+4 electrons
These reactions decompose water into hydrogen and oxygen, which are discharged from the gas outlet in the electrolysis cell, while oxygen is discharged from the gas outlet in the electrolysis cell.

Function
The main function of a hydrogen generator is to generate high-purity hydrogen gas. It has a wide range of applications in various laboratories and industrial applications, including but not limited to:
Laboratory applications: Used for chemical experiments in the laboratory, sample preparation, and as a reducing agent in the reaction chamber.

Industrial applications: Used in industrial processes such as metal welding, semiconductor manufacturing, chemical production, etc. Hydrogen is also used as fuel for fuel cells and hydrogen vehicles.

Energy storage: Hydrogen is considered one of the storage forms of renewable energy, and hydrogen generators are used to convert electrical energy into hydrogen to generate electricity when needed.

Laboratory and research: In the laboratory and research field, hydrogen can be used to study the chemical properties of hydrogen, hydrogen energy technology, and related fields of research.

Humidity
Hydrogen generators rely on water and electricity to make hydrogen. The hydrogen generator uses electricity to separate oxygen and hydrogen and then emits oxygen on one side and hydrogen on the other side.
Because it uses water, there is a lot of humidity inside the generator which can be a source of noise during R&D which is one of the obstacles we had to overcome.
The hydrogen generator has two columns of absorbing material that aim to reduce the humidity. The humidity is very low but since our sensors are highly sensitive to humidity levels, we needed a way to drop this level even more.
We raised this issue during the conference and one of the insights we gathered was that it's possible to use more of these humidity traps. Interestingly, these columns can be dried and reused, if you are confident that you can seal it well enough so that there is no leak.

Pressure
When handling the hydrogen generator, it was also important for us to learn that the specific hydrogen generator we were using could handle a pressure of up to 5 bar. One of our needs is to fill small cylinders with H2 at a pressure that's higher than the atmospheric level. In order to fill these cylinders, we need the H2 source to be of a higher pressure than the target pressure.

Flow
We learned that for the specific hydrogen generator model we use, its intended use case is to be a part of GC where hydrogen is used as a gas carrier. Since, GC requires lower flows the generator couldn't handle the flow rate we inputted and that's why it was presenting problems.
A smaller flow level is safer to use. The H2 generator also has protection protocols in place that automatically checks if there is a consumption of hydrogen (based on some resistance of the flow) so that the hydrogen won't spread out in the lab.

Products are sold in all regions of China and exported to countries around the world. They have been sold in more than 20 countries and regions including the United States, Germany, Morocco, Kenya, Saudi Arabia, Vietnam, Algeria, India, Tanzania, and Taiwan. Successfully provided well -known enterprises such as China Aerospace, PetroChina, China Nuclear Group, BYD, Jiuli Specialty, Tony Electronics, Zheng Energy Group and other well -known enterprises. There are many green hydrogen hydrogen hydrogenation stations such as Wulanchabu, Haikou, Hainan, Hainan Haikou, Yunnan Kunming, etc. provide green and hydrogen -making projects.