PEM electrolysis Cell
The Principle of water electrolysis:
Electrolytic water meeting the requirements (With electrical resistivity >1MΩ/ cm, and deionized or redistilled water in electronic and analysis industries can be used for this purpose.), after being put into the anode chamber of an electrolytic cell, when power is switched on, will be decomposed at once at the anode: 2H2 O = 4H++ 2O-2. The decomposed negative oxyanion (O-2) will immediately release electrons to form oxygen (O2), which will then be discharged from the anode chamber, with some water, into the water tank. The water can be used circularly, and oxygen will be discharged from the small hole of the top cover of the water tank into the atmosphere. The hydrogen proton, in the form of aqua ion (H+XH2 O), and under the action of electric field force, through SPE ion membrane, will arrive in the cathode to absorb electrons to form hydrogen, which will then be discharged from the cathode chamber into the gas/water separator, where most of the water it brought with from the electrolytic cell will be removed. The hydrogen with little water will be under moisture absorption of the desiccator, with its purity thus reaching 99.999 % or above.
The proton exchange membrane (PEM) electrolysis cell is a device that produces hydrogen and oxygen gas by using DC electricity to electrochemically split water. The cell is named for the electrolyte, which is a solid conductive polymer.
In the electrolysis cell, the water enters the anode and is split into protons, electrons, and oxygen gas. The protons are conducted through the membrane while the electrons pass through the electrical circuit. At the cathode, the protons and electrons recombine to form hydrogen gas.
A PEM cell contains an “active area” in which the presence of catalyst permits the reactions to take place. The structure of the active area of PEM cells consists of the membrane, the anode and cathode catalyst, and the anode and cathode flow fields. The flow fields distribute the flow of reactants and permit the products to exit. In practical implementations, individual electrolysis cells are assembled into stacks of cells. When these cells are stacked in a bipolar arrangement, the anode of one cell is adjacent to the cathode of the next cell. The anode of one cell is electrically connected to but fluidically isolated from the cathode of the next cell. In this way, the cells are electrically in series while the fluids follow a parallel circuit within the stack. The electrolysis stack is typically water-cooled by circulating excess reactant water through the cells.
|
Type
|
Current
|
Voltage
|
Pressure
|
H2 Producing Rate
|
Diameter
|
|
SY85A
|
DC9A
|
2-2.2V
|
0.7Mpa
|
60ml/min
|
Ø85mm
|
|
SY85B
|
DC9A
|
4-4.5V
|
0.7Mpa
|
120ml/min
|
Ø85mm
|
|
SY85D
|
DC9A
|
8-9V
|
0.7Mpa
|
240ml/min
|
Ø85mm
|
|
SY138A
|
DC45A
|
2-2.2V
|
0.7Mpa
|
300ml/min
|
Ø138mm
|
|
SY138B
|
DC36A
|
4-4.5V
|
0.7Mpa
|
500ml/min
|
Ø138mm
|
|
SY138C
|
DC36A
|
6-7V
|
0.7Mpa
|
750ml/min
|
Ø138mm
|
|
SY138D
|
DC36A
|
8-9V
|
0.7Mpa
|
1000ml/min
|
Ø138mm
|
|
SY17525
|
DC80A
|
50-60V
|
3Mpa
|
1Nm³/h
|
Ø175mm
|
|
SY17550
|
DC80A
|
100-120V
|
3Mpa
|
2Nm³/h
|
Ø175mm
|
|
SY33030
|
DC160A
|
60-70V
|
3Mpa
|
2Nm³/h
|
Ø330mm
|
|
SY33045
|
DC170A
|
90-100V
|
3Mpa
|
3Nm³/h
|
Ø330mm
|
|
SY66030
|
DC800A
|
60-70V
|
3Mpa
|
10Nm³/h
|
660*330mm
|
|
SY66060
|
DC800A
|
120-140V
|
3Mpa
|
20Nm³/h
|
660*330mm
|
1, Using PEM proton exchange membrane electrolysis (pure water) to produce high-purity hydrogen
2, Hydrogen production by PEM water electrolysis
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