Zeolite Molecular Sieves
ZSM-5 Molecular Sieve for VOC Adsorption
High-silica ZSM-5 zeolite with strong hydrophobicity, high thermal/hydrothermal stability and selective VOC adsorption, supplied as powder or honeycomb blocks for adsorption concentration systems.
Overview
ZSM-5 with a SiO₂/Al₂O₃ ratio around 300 offers a hydrophobic, thermally stable adsorption surface that selectively captures VOCs even in humid exhaust, and releases them cleanly during hot-air desorption — the core material of zeolite wheel / fixed-bed adsorption concentration systems.
Technical Data
| Powder property | Specification |
|---|---|
| SiO₂/Al₂O₃ | ~300 |
| Na₂O | <0.05 wt% |
| Powder D50 | ≤10 μm |
| Relative crystallinity | ≥90% |
| BET surface area | ≥380 m²/g |
| T-plot micropore surface area | ≥260 m²/g |
| Total pore volume | 0.25 ml/g |
| T-plot micropore volume | 0.12 ml/g |
| Average pore diameter | 2.5–3.0 nm |
Values shown are manufacturer specifications or typical values unless marked (*). Parameters marked (*) are reproduced from source documentation and may contain unit or OCR ambiguities — they are reference values only and must be confirmed against the current product specification before use in engineering design. Design values are confirmed per project after operating conditions are reviewed. Please contact us for current data sheets.
Key Features
- High silica — hydrophobic surface, works in humid exhaust
- High thermal and hydrothermal stability
- Good selective VOC adsorption
- Strong acid resistance
- Formed honeycomb blocks for low pressure drop
Typical Applications
- VOC adsorption concentration + catalytic oxidation systems
- Low-concentration, large-flow VOC exhaust
- Coating, printing and chemical process exhaust
Application Limits & Conditions
Customization
Formed products: 100×100×100 mm honeycomb blocks, 16 cells/cm² (*), wall thickness 0.6 mm, bulk density 0.40–0.45 g/cm³. Formed-product parameters marked (*) contain OCR ambiguities in the original documentation and must be confirmed before engineering use.
Data to Provide for a Quotation
To receive a material recommendation and quotation, please share your operating conditions:
- Gas flow rate (Nm³/h) and inlet / target outlet concentration
- Gas composition and main pollutant components
- Operating temperature and humidity
- SO₂ and dust concentration (where applicable)
- Existing reactor dimensions and current catalyst / adsorbent type
- Required service life and any special requirements
Same family
Related Products
Modified 5A Molecular Sieve
A-type 5A molecular sieve for selective adsorption, drying and gas separation, customized to the target medium and operating conditions.
Modified 13X Molecular Sieve
Sodium X-type (13X) molecular sieve with large pore structure and strong adsorption capacity, available with different modification systems for specific applications.
NaY Molecular Sieve
Y-type zeolite with high specific surface area and large pore volume, applied in VOC adsorption and catalyst support roles.
FAQ
Frequently Asked Questions
Why is ZSM-5 preferred for humid VOC exhaust?
Its high SiO₂/Al₂O₃ ratio makes the surface hydrophobic, so water vapor competes less for adsorption sites and VOCs are captured more selectively.
What VOCs can ZSM-5 adsorb?
Typical targets are benzene, toluene, xylene, alcohols, ketones, aldehydes, some esters and hydrocarbons. Polymerizable compounds, halogens and heavy-metal salts are not recommended without testing.
Why is ZSM-5 supplied as powder or honeycomb?
Powder suits compounding into coatings, wheels and shaped adsorbents, while the honeycomb form serves direct adsorption beds with low flow resistance. The choice follows your system configuration.
What does the high silica ratio mean?
The SiO2 to Al2O3 ratio of about 300 gives strong hydrophobicity and high thermal and hydrothermal stability, which is why ZSM-5 keeps its adsorption performance in humid VOC exhaust.
How is ZSM-5 regenerated in VOC systems?
In adsorption-concentration systems the sieve is desorbed thermally, typically with a small heated purge stream that carries the concentrated VOC to the oxidation stage.
Discuss this product for your gas conditions
Send us your operating conditions — we will confirm applicability and return a material recommendation.