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Activated Alumina for Natural Gas Drying
Core Adsorbent supplies activated alumina desiccant for natural gas drying and as a guard layer that protects molecular sieve dehydrators from free water and acids.
Activated alumina
Desiccant and guard layer
Acid resistant
Tolerates free water
15–35 days
Delivery time
1 t
MOQ per grade
01 Overview
When is activated alumina used for natural gas drying?
Activated alumina dries natural gas where moderate dew points are enough, and it is placed as a guard layer above molecular sieve to take free water, liquid carry-over and acids first. It tolerates liquid water better than molecular sieve and regenerates at lower temperature.
| Stand-alone drying | Activated Alumina Desiccant |
| Guard layer | Activated Alumina Desiccant above 4A Molecular Sieve |
| Deep drying | Add 4A Molecular Sieve main layer |
| Regeneration | Temperature swing |
| Support | Inert Alumina Ceramic Ball |
02 Challenges
Why protect a gas dryer with activated alumina?
Most early bed failures start at the inlet.
Liquid carry-over
Free water and glycol or amine carry-over damage the top of a molecular sieve bed.
Acid gases
Acidic components attack sieve binders over time.
Pressure drop growth
Fines from damaged beads raise pressure drop and shorten run length.
Change-out cost
Replacing a full molecular sieve bed costs more than replacing a guard layer.
03 Solutions
Where activated alumina fits
01
Guard layer in sieve dryers
Typical requirement: protect the main bed from liquids and acids
- Activated Alumina Desiccant — inlet layer above the sieve
- 4A Molecular Sieve — main drying layer below
02
Stand-alone gas drying
Typical requirement: moderate dew point, simple operation
- Activated Alumina Desiccant — main desiccant
- Inert Alumina Ceramic Ball — support and hold-down
03
Fuel and instrument gas
Typical requirement: dry small gas streams reliably
- Activated Alumina Desiccant — regenerable desiccant
04 Selection guide
Activated alumina and molecular sieve compared
Choose by required dew point and inlet conditions.
| Need | Recommended | Why |
|---|---|---|
| Moderate dew point | Activated Alumina Desiccant | Lower cost, easy regeneration |
| Very low water (cryogenic) | 4A Molecular Sieve with Activated Alumina Desiccant guard | Deep drying with inlet protection |
| Free water or acids at inlet | Activated Alumina Desiccant guard layer | Tolerates liquid water |
| Bed support | Inert Alumina Ceramic Ball | Inert, graded sizes |
05 Key properties
Activated alumina in gas service
Regenerable
Restores capacity by heating
Acid tolerant
Suits inlet layers
Beads
Bead sizes matched to your vessel design
COA
Lot test report with every shipment
Typical industry values; check bead size against your vessel design. Full data: Activated Alumina Desiccant.
06 From our plant
What you receive
The adsorbent, the packing and the plant it ships from.
Photos are replaced with real product, packing and plant images as they become available.
07 Support
Customisation and engineering support
- Layer proposal — send inlet conditions; we propose the alumina guard height above your molecular sieve.
- Grade matching — send the data sheet of the adsorbent you use now; we propose an equivalent grade.
- Complete bed supply — main adsorbent, guard layer and ceramic balls in one shipment, under one COA system.
- Packing — steel drums or jumbo bags, sealed against moisture; samples from 5–10 kg.
08 Related solutions
More natural gas and energy solutions
09 Recommended products
Products for natural gas drying
Can activated alumina replace molecular sieve?
Only where a moderate dew point is acceptable. For cryogenic or LNG service use 4A Molecular Sieve with an alumina guard.
How thick should the guard layer be?
It depends on liquid and acid load; typical designs use a small fraction of the bed height. Send your data for a proposal.
Does alumina regenerate at lower temperature?
Generally yes, it releases water more easily than molecular sieve.
Can you supply the guard and the sieve together?
Yes, with ceramic balls, in one shipment.