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Desiccant

Desiccant overview
Activated alumina
Silica gel
Molecular sieve

Desiccant
Activated Alumina BeadsSilica gel desiccant and other desiccant types adsorbs moisture from gas through a chemical reaction. Different desiccant adsorb more than others based on process conditions. For example activated alumina is an excellent moisture adsorber when the relative humidity is 100%. It can adsorb up to 40% its weight at 100% relative humidity. However its efficiency declines as the relative humidity falls. The most common desiccant types used to dry compressed air are...
  • Activated alumina - excellent all purpose desiccant for drying air and most other gases with high relative humidities
  • Silica gel - desiccant silica gel is a very effective desiccant for drying compressed air/gas streams, especially natural gas. Silica gel features excellent adsorption at mid inlet relative humidity
  • Molecular sieve - most effective for applications with low inlet flows and low relative humidities, (Less than 30-35%RH). Can achieve the lowest dewpoints possible to -120°F

    There are various grades of each type and they are available in a large variety of shapes and sizes. Fluid Energy Industrial has vast experience selecting desiccant to cost-effectively dry gas streams and can help you find the best drying solution. Contact us at 704-846-2999 or email us to discuss an optimized desiccant solution for your application.

    Activated Alumina
    Activated alumina is an excellent all-purpose desiccant for drying air and most other gases with high relative humidities. Dewpoints of -100°F can be achieved (depending on dryer). Activated alumina can be used in both heated and heatless / pressure swing dryers.Activated Alumina Beads

    Activated alumina has: excellent porosity creating tortuous paths and extended surface area; high strength against crushing; and very stable physical and chemical characteristics, even in high temperature and corrosive environments.
    Activated Alumina
  • -100°F dew points obtainable
  • Unaffected by catastrophic liquid water loading
  • Ideal for both heatless and heat regenerated systems
  • Low regeneration temperature 250°F to 500°F

    Activated Alumina Specifications
    Bead Sizes (in.) 1/16'', 1/8'', 3/16'', ¼'' (custom sizes available)
    Moisture removal at 40%RH 13.5%/wt
    Moisture removal at 60%RH 20%/wt
    Moisture removal at 100%RH 40%/wt
    Crush Strength (lbs) 30 - 70 (Depends on grade)
    Abrasion Loss (%/wt) <0.1
    RH - Relative Humidity
    %/wt - Percent weight

    Fluid Energy Industrial offers custom desiccant solutions. Desiccant with different characteristics are available. Contact us at 704-846-2999 or email us to discuss an optimized desiccant solution for your application. A Fluid Energy sales engineer can work with you to select a cost-effective desiccant solution that meets or exceeds your drying requirement. Certified service technicians are also available to change your dryer's desiccant and perform all other service.

    Silica Gel
    Silica gel desiccant is a very effective desiccant for drying air and often used to dry natural gas. Silica gel desiccant has excellent static adsorption at mid inlet relative humidity. White Silica Gel BeadsDue to its uniform bead size and high bulk density silica gel beads minimize nesting and channeling within the dryer. Large volume drying applications use silica gel because it offers premium drying performance and an energy cost savings compared to other desiccant.

    Silica gel is odorless, non-toxic, and non-corrosive, with stable chemical and thermal characteristics.Silica Gel Beads Interconnected pores form a vast surface area, silica gel can adsorb moisture 40% or more of its weight at 100% humidity.
    Silica Gel Features
  • -80°F dew points obtainable
  • Susceptible to liquid and thermal fracture; recommend using an activated alumina pre-buffer
  • Most common on heat regenerated systems
  • Low regeneration temperatures, 250°F to 500°F

    Silica Gel Specifications
    Characteristics Grade 1 Grade 2
    Bead Size (in.) .14 (custom sizes available)
    Moisture removal at 40%RH 23%/wt 18%/wt
    Moisture removal at 60%RH 34%/wt 29%/wt
    Moisture removal at 100%RH 40%/wt
    Crush Strength (lbs) 45 27
    Abrasion Loss (%/wt) <0.2
    RH - Relative Humidity
    %/wt - Percent weight

    Fluid Energy Industrial offers custom desiccant solutions. Desiccant with different characteristics are available. Contact us at 704-846-2999 or email us to discuss an optimized desiccant solution for your application. A Fluid Energy sales engineer can work with you to select a cost-effective desiccant solution that meets or exceeds your drying requirement. Certified service technicians are also available to change your dryer's desiccant and perform all other service.

    Molecular Sieve
    Molecular sieve is most effective for applications with low inlet flows and low relative humidities, (less than 30-35%RH). A common molecular sieve application is working as a polishing layer to achieve dew points down to -120°F, and in applications for drying hydrocarbons and other exotic gases.Molecular Sieve Beads

    Molecular Sieve is a combination of optimized desiccant materials including: sodium potassium and calcium alumina silicate. The actual combination of materials varies depending on the product. Fluid Energy offers a wide selection of molecular sieve to meet the requirements of different drying applications. Molecular sieve is non-toxic and insoluble to water and most organic solvents. Because molecular sieve can provide the lowest possible dewpoints it is used in the most demanding and unique drying applications.
    Molecular Sieve
  • Regeneration temperatures, 350°F to 700°F
  • Dewpoints to -120°F
  • Recommended for polishing applications and unique demanding drying applications

    Carbon Molecular Sieve - for use with nitrogen gas generators. Separates oxygen from compressed air resulting in high quality nitrogen effluent.

    Molecular Sieve Specifications
    Bead Sizes (in.) 1/16'', 1/8'' (custom sizes available)
    Moisture removal at 40%RH,
    60%RH and 100%RH
    22%/wt
    Crush Strength (lbs) 18
    RH - Relative Humidity
    %/wt - Percent weight

    Fluid Energy Industrial offers custom desiccant solutions. Desiccant with different characteristics are available. Contact us at 704-846-2999 or email us to discuss an optimized desiccant solution for your application. A Fluid Energy sales engineer can work with you to select a cost-effective desiccant solution that meets or exceeds your drying requirement. Certified service technicians are also available to change your dryer's desiccant and perform all other service.














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