Common Shapes of Activated Alumina
A brief introduction to the common shapes of activated alumina.
Common Shapes of Activated Alumina
Activated alumina is processed into various shapes depending on its application, the most common being strips, spheres, and granules.
Comparison of the three shapes
Comparison Dimensions | Strip-shaped | Spherical | Granular |
Typical Specifications | Φ1.5-3.5×3-10mm | Φ3-7mm | 4-30 mesh |
Bulk Density | 0.65-0.75 g/ml | 0.70-0.80 g/ml | 0.75-0.85 g/ml |
Compressive Strength | Medium | High (≥80N/particle) | Low |
Compression Drop | Low | Medium | High |
Abrasion Resistance | Medium | Good | Average |
Cost | Medium | High | Low |
Characteristics and Applicable Scenarios of Different Shapes
Strip Shape: Formed by extrusion, it has a high porosity and low pressure drop, suitable for long-term continuous operation conditions such as fixed-bed adsorption towers and natural gas dehydration.
Spherical Shape: Formed by rolling or dropping balls, it has a smooth surface, good wear resistance, and high strength, suitable for dynamic processes requiring frequent regeneration such as PSA nitrogen production and compressed air drying.
Pelletized Shape: Made from crushed and screened block materials, it has the lowest cost but lower strength, suitable for water treatment defluorination and single-use applications where high strength is not required.
Selection Recommendations
Application Scenarios | Recommended Shapes | Reasons |
Compressed Air Drying (PSA) | Spherical | Wear-resistant, suitable for frequent regeneration |
Natural Gas Dehydration (Fixed Bed) | Strip | Low pressure drop, suitable for continuous operation |
Drinking Water Defluoridation | Granular | Low cost |
Catalyst Support | Strip or spherical | Selected according to reactor type |
Summary
Activated alumina selection can be summarized as follows: strip type for fixed beds, spherical type for PSA, and granular type for water treatment. A comprehensive consideration of equipment type, process requirements, and cost budget is necessary. We are a Chinese activated alumina supplier. For more information, please contact us via email at annayu@169chem.net or WhatsApp at +8618909016373.