Type A silica gel desiccant, also known as pore silica gel desiccant, includes fine-pore spherical silica gel and fine-cell block silica gel, and the appearance is transparent or translucent glass. The average pore diameter is 2.0-3.0 nm, the specific surface is 650-800 m2/g, the pore volume is 0.35-0.45 ml/g, the specific heat is 0.92 KJ/kg.°C, and the thermal conductivity is 0.63 KJ/m.Hr.°C.
Application
Mainly used for drying, moisture proof, can also be used as catalyst carrier, adsorbent, separating agent, and pressure swing adsorption, color changing silica raw materials.
Static adsorption of type A silica gel desiccant:
| RH | 20% | 40% | 60% | 80% | 100% |
| Ab5soprtion | 9.3% | 10.3% | 30.23% | 35% | 37.33% |
Dynamic adsorption of type A silica gel desiccant (30 ° C RH90%):
| Samples | Sample 1 | Sample 2 | Sample 3 |
| Time/Hour | absorption rate | ||
| 1 | 16.9 | 22.60 | 18.6 |
| 2 | 29.1 | 32.4 | 30.8 |
| 3 | 34.3 | 34.7 | 34.6 |
| 4 | 35.5 | 35.7 | 35.5 |
| 5 | 35.7 | 35.7 | 35.5 |
| average | 35.6 | ||
