Molecular Sieve 3A
33 years professional experience for molecular sieve
pellet, sphere,powder,as a strong absorbent.
Molecular Sieve 3A Detail:
Introduction
molecular sieve type 3A is a kind of alkali aluminosilicate and able to absorb moleculAR with their critical diameters no more than 3A. it is the potassium form of the type A crystal structure. Type 3A has an effective pore opening of about 3 angstroms (0.3nm). This is large enough to allow in moisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximizes lifetime when dehydrating such molecules.
Typical Chemical Formula
0.45 K2O. 0.55 Na2O. Al2O3. 2 SiO2. 4.5H2O
Technical Parameter
Item | Unit | Specification | ||
Diameter | mm | 0.5-0.9 | 1.0-1.5 | 1.5-2.0 |
Bulk density | g/ml | ≥0.68 | ≥0.68 | ≥0.68 |
Size ratio up to grade |
| ≥98.0 | ≥98.0 | ≥98.0 |
Water adsorption capacity (Effective) | (RH60, 25) | ≥18 | ≥18 | ≥18 |
(RH20, 25) | ≥15 | ≥15 | ≥15 | |
Delta T value | (25g sieves / 25ml H2O) | ≥50 | ≥45 | ≥45 |
(10g sieves / 10ml H2O) | ≥38 | ≥35 | ≥35 | |
Nitrogen adsorption | ml/g | ≤1.0 | ≤1.0 | ≤1.0 |
Dew point |
| ≤-60 | ≤-60 | ≤-60 |
Dust drops | unit | ≤15 | ≤12 | ≤12 |
Ignition loss | (950) | ≤2 | ≤2 | ≤2 |
Typical Application
Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadiene)
Cracked Gas Drying
Drying of natural gas, if COS minimization is essential, or a minimum co-adsorption of hydrocarbons is required.
Drying of highly polar compounds, such as methanol and ethanol
Drying of liquid alcohol Static, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
Drying of refrigerants
Regeneration
Molecular sieve Type 3A can be regenerated by either heating in the case of thermal swing processes; or by lowering the pressure in the case of pressure swing processes.
To remove moisture from a 3A molecular sieve, a temperature of 200-230°C is required. A properly regenerated molecular sieve can give moisture dew points below -100°C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
Size
3A - Zeolites are available in beads of 1-2 mm, (10x18 mesh) 2-3 mm, (8x12 mesh) , 2.5-5 mm, (4x8 mesh) and as powder, and in pellet 1.6”, 3.2”.
Attention
To avoid damp and pre-adsorption of organic before running, or must to be reactivated
