Membranes for Hydrogen Recovery

The principle of membrane separation of a gas mixture is based on the different penetration rates of its components through a polymeric membrane due to the differential partial pressures of the gas on either side of the membrane.

Membrane gas separation technology is widely used throughout the world to extract nitrogen from air, extract hydrogen from hydrogen-bearing gas mixtures, and extract carbon dioxide and water from natural gas.

Grasys Membrane Cartridges

• High selectivity
• High specific membrane surface area
• Wide pressure range (up to 13 MPa)
• Low pressure loss during separation
• Excellent chemical stability

Grasys Cartridge-Based Membrane Units

• Low capital and operating costs
• Easy to install and maintain
• Compact unit dimensions
• Removal of several impurities in a single process cycle
• Environmentally friendly technology (no chemicals used)

Applications

• Oil refining processes
  Applications related to hydrogen recovery and concentration in refinery cycles. Concentration of hydrogen from hydrotreating, hydrocracking, isomerisation and catalytic reforming off-gases, reducing the concentration of undesirable impurities to the required level.
• Chemical and petrochemical processes
  Recovery and concentration of hydrogen from pyrolysis, alkane and alkene dehydrogenation, methanol production off-gases and other process streams.
• Ammonia production
  Separation of hydrogen from nitrogen, methane and argon in ammonia-bearing purge gas streams.
• Synthesis gas production
  Regulation of the hydrogen/carbon monoxide ratio in the production cycle of oxosynthesis plants.