Adsorption hydrogen plants

Adsorption hydrogen plants

Grasys adsorption plants utilizing fast cycle are designed for production of high-purity hydrogen from gas streams. Grasys FCPSA plants are capable of producing hydrogen with the purity of up to 99.9995% and a minimum pressure drop in the separation process.

Pressure swing adsorption technology is the most prominent achievement in recent years in the field of gas separation. Due to the invention of this technology many problems typical of hydrogen PSA plants have been resolved.

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Adsorption hydrogen plantsAdsorption hydrogen plants
AdvantagesGeneral informationTechnical characteristicsApplicationBookletsDocumentation

Advantages of Grasys adsorption hydrogen plants

  • Advanced fast-speed flow process of pressure swing adsorption
  • Patented models of reliable multi-channel rotary valves ensuring efficient system operation
  • Compact modular skid-mounted design with preloaded adsorbent
  • Minimum warm-up time before reaching the full-load condition
  • Adjustable cycle speed ensuring the maximum process efficiency by variation of process parameters

General information

FCPSA plants use two technological accomplishments: the two-valve rotary system and the new-generation structured adsorbent stable to fluidization. This ensures an up to 100-time increase in the cycle speed — up to 50 cycles per minute — as compared with conventional PSA plants and, as a result, a multiple reduction in the required volume of adsorbent. This is why, the dimensions and weight of FCPSA plants offered by Grasys are by an order of magnitude lower than those of conventional PSA plants.

In contrast to modern FCPSA plants all conventional PSA plants so far have used only granular adsorbent. Due to possible loss of such adsorbent, the cycle speed may not be materially increased and varies within 0.05 to 0.5 cycles per minute. In order to provide the required capacity, PSA plants include 4 to 16 large-scale adsorbent beds with a complex system of valves and pipelines. FCPSA plants offered by Grasys have no such deficiencies and are increasingly gaining popularity all over the world.

Basic technical characteristics of adsorption 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 70–120

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

Application of Grasys adsorption 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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