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Zeolite granular 3A and 5Amolecular sieve as adsorbent for Insulating Glass
Zeolite granular 3A and 5Amolecular sieve as adsorbent for Insulating Glass
Zeolite granular 3A molecular sieve as adsorbent for Insulating Glass
Molecular Sieve 3A is an alkali metal alumino-silicate; 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 maximises lifetime when dehydrating such molecules.
1. Typical Chemical Formula
0.45 K2O . 0.55 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
SiO2 : Al2O3 ≈2
2. Technical Parameter
| Item | Unit | Technical data | |||
| Shape | Pellet | Sphere | |||
| Diameter | mm | 1.5-1.7 | 3.0-3.3 | 1.7-2.5 | 3.0-5.0 |
| Size ratio up to grade | % | ≥98 | ≥98 | ≥96 | ≥96 |
| Bulk density | g/ml | ≥0.68 | ≥0.68 | ≥0.68 | ≥0.68 |
| Wear ratio | % | ≤0.20 | ≤0.25 | ≤0.10 | ≤0.10 |
| Crushing strength | N | ≥45/cm | ≥60/cm | ≥30/piece | ≥70/piece |
| Static water adsorption | % | ≥20 | ≥20 | ≥20 | ≥20 |
| Ethylene adsorption | % | ≤3.0 | ≤3.0 | ≤3.0 | ≤3.0 |
| Water content, as shipped | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
3. Typical Application
1) Drying of unsaturated hydrocarbons (e.g. ethylene, propylene,
butadien)
2) Cracked Gas Drying
3) Drying of natural gas, if COS minimization is essential, or a
minimum co-adsorption of hydrocarbons is required.
4) Drying of highly polar compounds, such as methanol and ethanol
5) Drying of liquid alcohol
6) Static, (non-regenerative) dehydration of insulating glass
units, whether air filled or gas-filled.
7) Drying of refrigerants
4. Regeneration
NANXIANG 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.
5. 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.
Zeolite granular 5A molecular sieve as adsorbent for Insulating Glass
Introduction
5A Molecular Sieveis an alkali alumino silicate; it is the
calcium form of the Type A crystal structure. Type 5A has an
effective pore opening of 5 angstroms (0.5 nm). It will adsorb
molecules with a kinetic diameter of less than 5 Angstrom and
exclude those larger.
It is especially suitable for PSA adsorber applications where it
may be used for the separation of normal- and iso- paraffins (C4 to
C6 species), in PSA hydrogen purification and in oxygen
concentrators.
Typical Chemical Formula
0.7 CaO . 0.3 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
SiO2 : Al2O3 ≈2
Application
The strong ionic forces of the divalent calcium ion makes it an
excellent adsorbent to remove water, CO2, H2S from sour natural gas
streams, while minimising COS formation. Light mercaptans are also
adsorbed.
It is also used for the separation of normal- and iso paraffins.
Production of high purity N2, O2, H2 and inert gases from mixed gas
streams.
Technical Parameter
| Item | Unit | Technical data | |||
| Shape | Pellet | Sphere | |||
| Diameter | mm | 1.5-1.7 | 3.0-3.3 | 1.7-2.5 | 3.0-5.0 |
| Size ratio up to grade | % | ≥98 | ≥98 | ≥96 | ≥96 |
| Bulk density | g/ml | ≥0.64 | ≥0.64 | ≥0.66 | ≥0.66 |
| Wear ratio | % | ≤0.20 | ≤0.40 | ≤0.20 | ≤0.20 |
| Crushing strength | N | ≥30/cm | ≥45/cm | ≥30/piece | ≥60/piece |
| Static water adsorption | % | ≥21.5 | ≥21.5 | ≥21.5 | ≥21.5 |
| Water content, as shipped | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
Regeneration
NANXIANG molecular sieve Type 5A 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 5A molecular sieve, a temperature of
250-300°C is required. A properly regenerated molecular sieve can
give moisture dew points below -100°C, or mercaptan or CO2 levels
below 2 ppmv.
The outlet concentrations on a pressure swing process will depend
on the gas present, and on the conditions of the process.
Size
5A - 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.
