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Currently, PEM cell technology is the most promising, gradually replacing traditional alkaline electrolysis. PEM (Proton Exchange Membrane) is a proton exchange semipermeable membrane made of special high-tech materials that can conduct protons – hydrogen atoms nuclei – through themselves. The PEM cell is used to separate hydrogen from electrolysis by-products such as oxygen and other impurities (e.g. ozone and chlorine). Therefore, despite high purity requirements for initial electrolyte solution, user does not need to spend additional money on additional hydrogen produced purification.

Electrolysis cell is a system’s core. A proton exchange membrane electrolyser separates reagents and transports protons by blocking direct electron path through the membrane. PEM fuel cells use a solid polymer membrane (a thin plastic film) that is permeable to protons when saturated with water, but does not conduct electrons.

The hydrogen generated in the cell enters a hydrogen separator, where residual moisture is separated, and the hydrogen enters a final stage of purification – PSA dehydration columns. After, hydrogen with 99.9998% purity is supplied to customer’s technological process.

Advantages:

  • High purity hydrogen production (from 99.9998%);
  • Long production life – electrolysis unit operation period is 20 years;
  • Low specific power consumption – up to 4.8 kWh/Nm3;
  • No unit elements corrosion which are in contact with alkaline solutions;
  • Quick operation mode start-up, within 10-15 minutes;
  • Minimum amount of installation works – only water and electricity supply are required after delivery;
  • Compact generator dimensions, allowing equipment to be placed in a container.
  • No system nitrogen purging is required;
  • When operating on hydrogen, cells produce no emissions other than water vapour – no carbon dioxide, nitrogen oxides or soot;
  • No noise or vibration;
  • High reliability and minimal maintenance due to moving parts absence. Maintenance is carried out only once a year;
  • Suitable for remote and mobile sites with high power and continuity requirements;
  • Completely safe in use;
  • Hydrogen pressures up to 30 bar can be maintained without booster compressor.

Technical Specifications:

1.     Demand Nm³/hour up to 250 and more
2.     H2 purity % vol. up to 99,9998 (up to 1 ppb)
3.    Output pressure bar (ex.) up to 30
4.    Gas dew point °С up to -70

Generator (Unit) Composition:

  • Electrolytic cell;
  • Hydrogen after-treatment and after-drying system;
  • Hydrogen generator chiller;
  • Water treatment system;
  • Demineralised water tank;
  • Automated control system;
  • Hydrogen distribution system.

Additional Equipment:

  • Hydrogen generator can be equipped with an external hydrogen leakage sensor;
  • Block container;
  • Remote control and monitoring system.

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