Membrane hydrogen plants

Membrane gas separation plants are capable of producing gas flow enriched with hydrogen by up to 92–99% (vol.) with the option of its return to flow process. Due to the increase in hydrogen concentration, the flow rate of re-circulating HBG decreases substantially, thus ensuring a considerable saving of process compressors resource.

Grasys hydrogen plants utilizing the membrane separation principle allow concentrating hydrogen in waste, residual, fuel and other gases up to 99.5% with the product flow rate of up to 50,000 nm³/hr.

Up-to-date membrane hydrogen plants are a decent alternative to cryogenic and adsorption systems. In many cases, membrane hydrogen concentration plants find use where the use of equipment based on other technologies is impossible or ineffective from the technical and economic standpoint.

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AdvantagesGeneral informationTechnical characteristicsApplicationBookletsDocumentation

Advantages of Grasys membrane hydrogen plants

  • Membrane modules based on sophisticated materials
  • Compact modular skid-mounted design
  • Use of a variety of membrane module types to cover a wide range of flows varying within 500 to 50,000 nm³/hr
  • High membrane stability as regards a number of impurities (higher hydrocarbons, hydrogen sulfide etc.), which makes the membrane solution an ideal choice for refining and petrochemical applications
  • Hydrogen recovery at low operating costs

General information

An important advantage of membrane hydrogen plants consists in their ability to operate under various pressures of separated gas — 10 to 120 atm. Besides, membrane plants, unlike adsorption and cryogenic systems allow easy adjustment of product hydrogen purity. This enables the operator to choose the optimum equipment operation mode depending on the tasks set.

Also, a significant advantage is the complete absence of moving parts in the plant design. This enables the production of exceptionally reliable and simple in operation equipment with full automation, excellent performance characteristics and a very small footprint.

Plants are supplied on a compact skid which minimizes the scope of installation works at the customer site. Where necessary, the plant is fitted with additional process equipment according to the customer requirements. The operational life of hydrogen plants produced by Grasys is 120 to 180 thous. hours of continuous operation.

Basic technical characteristics of membrane hydrogen plants

Parameter Value
Hydrogen parameters at the plant output
  • hydrogen purity, nm³/hr
  • capacity, nm³/hr*
  • pressure, atmg
  • dew point, °C
Ambient air temperature
  • during operation, °C
  • during storage, °C
Plant operational life, thous. hours 120–180

* The capacity is referenced to the standard conditions (t = 20 °C, P = 1 atm).

Application of Grasys membrane hydrogen plants

  • Hydrogen recovery in process gases of hydrotreating, hydrocracking, isomerization, catalytic reforming
  • Reduction in concentration of impurities up to the required level
  • Hydrogen recovery in process gases of pyrolysis, dehydration of alkanes and alkenes, process gases of methanol production
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