The difference between aluminum silica gel and ws aluminum silica gel - II
3. Application scenarios
Characteristics | Aluminum silica gel | Water-resistant aluminum silica gel |
Applicable environment | Low humidity gas drying (such as air separation), room temperature adsorption | High humidity or liquid water environment (such as hollow glass sealing, nuclear wastewater treatment) |
Typical uses | Natural gas dehydration, catalyst carrier, ordinary desiccant | Refrigerant drying, pneumatic brake system, liquid gas adsorption |
Advantage areas | Low cost, suitable for drying and separating conventional gases | Strong water resistance, suitable for extreme humidity or liquid water contact scenarios |
4. Water resistance principle
The water resistance of water-resistant silica-alumina gel comes from:
Structural optimization: more uniform micropore distribution reduces water penetration channels.
Chemical modification: introduce hydrophobic groups (such as silane coupling agents) or enhance
the crosslinking density of silicon oxygen bonds (Si-O-Si) to inhibit hydrolysis reactions.
Mechanical strengthening: densification of particle surface to avoid structural damage caused by
water absorption and expansion.
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