ANTITECK - A Life Sciences Company Provide Lab Equipment, Lab Consumable and Science Equipment

Hydrogen Generator

Hydrogen generator used in laboratory

1. What is hydrogen generator?
    1.1 Working principle of hydrogen generator
    1.2 Structure of hydrogen generator
    1.3 Process flow of hydrogen generator
    1.4 Parameter of hydrogen generator
2. Use of hydrogen generator
3. How to buy hydrogen generator?

What is hydrogen generator?

Hydrogen generator is a self-regulating hydrogen generator for hydrogen fuel cells.

Working principle of hydrogen generator

Hydrogen production by electrolysis of pure water

Electrolytic water (resistivity greater than 1MΩ/cm, either deionized water or secondary distilled water for electronic or analytical industries) is fed into the anode chamber of the electrolyzer to meet the requirements. The water is immediately decomposed at the anode after being energized: 2H2O=4H++ 2O2-, and the negative oxygen ion (O2-), which is then released at the anode, forms oxygen (O2) and is discharged from the anode chamber, carrying part of the water into the water tank, which can be recycled, and the oxygen is put into the atmosphere through a small hole in the top cover of the water tank. The hydrogen ions, in the form of hydrated ions, pass through the SPE ion membrane under the action of electric field force and reach the cathode to absorb electrons to form hydrogen gas, which is discharged from the cathode chamber and enters the gas-water separator, where most of the water carried out from the electrolysis tank is removed, and the hydrogen gas containing trace water is then absorbed by the dryer to reach a purity of over 99.999%.

Hydrogen production by electrolysis of lye

The working principle of lye electrolysis for hydrogen production is the traditional diaphragm lye electrolysis method. The conductive medium in the electrolysis tank is an aqueous potassium hydroxide solution, and the separator of the two electrode chambers is a high-quality diaphragm for aerospace electrolysis equipment, which is integrated with the end plate to form an electrolysis tank with corrosion-resistant and good mass transfer grating electrodes. After applying direct current to both poles, water molecules immediately undergo an electrochemical reaction at both poles of the electrolyzer, producing oxygen at the anode and hydrogen at the cathode. The reaction equation is as follows: Anode: 2OH--2e → H2O+1/2O2↑ Cathode: 2H2O +2e → 2OH- +H2↑ Total reaction equation: 2H2O → 2 H2↑ +O2↑ The instrument has automatic control of pressure control, overpressure protection, flow rate display, flow rate tracking, etc.; so that the output hydrogen can be adjusted fully automatically (within the range of gas production) under constant pressure and according to the amount of hydrogen used in the gas chromatograph.

Structure of hydrogen generator

The hydrogen generator consists of an electrolysis cell, pure water tank, hydrogen/water separator, collector, dryer, sensor, pressure regulating valve, switching power supply, and other components. Hydrogen can be produced by electrolysis of pure water only. After power is applied, the cathode of the electrolytic cell produces hydrogen and the anode produces oxygen, and the hydrogen enters the hydrogen/water separator. Oxygen is discharged into the atmosphere. The hydrogen/water separator separates hydrogen from water. The hydrogen enters the dryer and dehumidifies, and then is adjusted to the rated pressure (0.02~0.45MPa adjustable) by the pressure stabilizer and regulator valve and output by the outlet. The hydrogen production pressure of the electrolysis cell is controlled by the sensor at about 0.45MPa. When the pressure reaches the set value, the power supply of the electrolysis cell is cut off; when the pressure drops and is lower than the set value, the power supply is restored.


a. Zero-pole pitch, high-activity SPE catalytic electrode.

b. The structure of compound electrolytic cell with excellent performance of mass and heat transfer chemical process.

c. Electrochemical properties, corrosion resistance, passivation resistance, and other superior compounds electrolytic cell selection materials.

d. Complete, perfect, and reliable electrical automatic control system.

Process flow of hydrogen generator

1Tank cover
2Water tank
3Supply pipe
4Electrolysis power
5Gas-water separator
6Pressure gauge
8Pressure protector
10Venting valve
12Condensate return pipe
13Hydrogen and water outlet pipe
14Oxygen, water outlet pipe
15Electrolysis tank

Parameter of hydrogen generator

Hydrogen purity99.999%
Hydrogen flow0-300ml/min (in 0.4MPa state)
Working pressure0.4MPa Power
Consumption150W (single-phase)
Working voltage220V±10% 50Hz

Use of hydrogen generator

Hydrogen fuel cell generator

When the hydrogen generator is turned on, the raw material hydrogen is first replaced by the system and emptied from valve 3. After the high-purity nitrogen in the system is replaced, the operating temperature, the operating pressure, and the amount of gas discharge are selected according to the hydrogen content in the raw material hydrogen and the amount of high-purity hydrogen required by the user concerning the data in Table 1, and then the palladium tube is heated by electricity and the high purity hydrogen flows out from valve 2.

To adjust the temperature, set the temperature according to the instructions that come with the product. It takes a period, usually about 2 to 3 hours, to replace the line in front of valve 2 from the high-purity hydrogen produced by palladium diffusion to the actual high-purity hydrogen obtained. Since this device is subject to product quality inspection before leaving the factory, the valve 1 and valve 3 lines are filled with high-purity nitrogen, and the section of the line from valve 2 to the front of the line is filled with high-purity nitrogen. When the equipment is stopped, the power should be stopped first, after the device has cooled down and all the valves are closed before stopping the gas, to reduce the time of displacing the system in the next use.

It is generally believed that the greater the difference in pressure between import and export and the higher the temperature, the greater the permeation of hydrogen under a certain thickness of palladium tube, but the average pressure is 8~3kg/cm2 and the operating temperature is 300~400℃.

Installation of hydrogen generator

Hydrogen water generator

Preparation before starting

a. Take out the hydrogen generator from the packing box, check if there is any damage due to improper transportation, check the spare parts of the instrument, and check if the certificate of conformity and warranty card is complete. Check whether the spare parts, certificate of conformity, and warranty card are complete. And prepare the following items, including 300mg KOH and silica gel drying granules, 1 glass stirring bar, and 1500mL glass container.

b. Add electrolyte.
a) Take out all the potassium hydroxide in the spare parts and pour them into a container, then add 500mL of secondary distilled water or deionized water as the mother liquor, stir thoroughly and wait for the electrolyte to cool completely before use.
b) Open the outer lid of the reservoir and remove the inner lid. (The inner lid is to prevent leakage when transporting and should not be run with the inner lid when using.) Save the inner lid for use when transporting again.
c) Pour the cooled electrolyte (mother liquor) into the reservoir, and then add secondary distilled water or deionized water, do not exceed the upper water level line and do not go below the lower water level line. Screw on the outer cover and use it after 10 minutes.

Instrument internal inspection of hydrogen generator

a. Turn on the power of the hydrogen generator.

b. Turn on the power switch, the pressure gauge starts to rise, check the electrolysis indication (green light) on the instrument panel, the flow indication (pointer gauge) should be around 1000, and the pressure indication (pressure gauge) should reach 0.4MPa within 5 minutes, the pointer indication drops to "0", indicating that the instrument system is working normally and the self-test Qualified.

c. If after 5 minutes, the flow indicator is still "1000", and the pressure indicator is "0", indicating that the switch is not tightened with air leakage, please continue to tighten the switch, so that the hydrogen generator pressure, flow rate to meet the qualified standards.

d. When using the hydrogen generator, you should pay attention to whether the flow indication and chromatograph with the same amount of gas, such as flow indication beyond the actual amount of chromatograph larger, should stop to check the leakage, the method of reference to the instrument fault causes and troubleshooting methods to adjust, and then check the self-test method before use.

e. Periodically check whether the silica gel in the filter is discolored, and if it is discolored, please replace or regenerate it immediately. The method is to unscrew the filter, then unscrew the top cover of the filter, replace the silica gel, tighten the top cover, and tighten the filter on the base. And check whether there is air leakage.

f. After the hydrogen generator is used for some time, the electrolyte will gradually decrease, when the electrolyte level is close to the lower limit, you should make up water in time, at this time, you only need to add secondary distilled water, when adding liquid or water, the level should not exceed the upper limit, nor should it be lower than the lower limit.

g. When the hydrogen generator has been used for six months, please replace the electrolyte. (The concentration of potassium hydroxide solution used in the hydrogen generator is about 10%.)

h. Do not run the hydrogen generator at "0" pressure with no load. The electrolytic cell and switching power supply components will be burned out when running at no load. The whole instrument will be damaged.

How to buy hydrogen generator?

ANTITECK provide lab equipment, lab consumable, manufacturing equipment in life sciences sector.
If you are interested in our hydrogen generator or have any questions, please write an e-mail to, we will reply to you as soon as possible.

    AntiTeck Life Sciences Limited

    A1-519, XingGang GuoJi, Yingbin Road, Huadu, Guangzhou, China, 510810
    Free Quote
    linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram
    We use cookies in order to give you the best possible experience on our website. By continuing to use this site, you agree to our use of cookies.
    Privacy Policy