|
|
|
|
|
|
|
|
|
|
3A Molecular Sievedetail
Introduction
molecular sieve type 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.
Typical Chemical Formula
0.45 K2O . 0.55 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
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 |
≥0.68 |
≥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 |
Typical Application
 Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
 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”.
4A Molecular Sieve Detail
Introduction
molecular sieve type 4A is an alkali alumino silicate; it is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms (0.4nm). 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger. Such adsorbable molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxyde and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded.
Typical Chemical Formula
Na2O . Al2O3 . 2SiO2 . 4.5 H2O
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 |
≥0.66 |
≥0.66 |
≥0.66 |
≥0.66 |
| Wear ratio |
% |
≤0.20 |
≤0.40 |
≤0.20 |
≤0.20 |
| Crushing strength |
N |
≥30/cm |
≥45/cm |
≥30/piece |
≥70/piece |
| Static water adsorption |
% |
≥20.5 |
≥20.5 |
≥21 |
≥21 |
| Static methanol adsorption |
% |
≥15 |
≥15 |
≥15 |
≥15 |
| Water content, as shipped |
% |
≤1.5 |
≤1.5 |
≤1.5 |
≤1.5 |
Application
 Drying and removing of CO2 from natural gas, LPG, air, inert and athmospheric gases, etc.
 Removal of hydrocarbons, ammonia and methanol from gas streams
(ammonia syn gas treating)
 Special types are used in the air break units of buses, trucks and locomotives.
 Packed in small bags, it may be used simply as a packaging desiccant.
Regeneration
Naike molecular sieve Type 4A 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 4A molecular sieve, a temperature of 250-280°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
4A - 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”.
5A Molecular Sievedetail
Introduction
molecular sieve type 5A is 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
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
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”.
13X Molecular Sievedetail
Introduction
molecular sieve 13X is the sodium form of the type X crystal and has a much larger pore opening than the type A crystals. It will adsorb molecules with a kinetic diameter of less than 9 Angstrom (0.9 nm) and exclude those larger.
It also has the highest theoretical capacity of the common adsorbents and very good mass transfer rates. It can remove impurities too large to fit into a type A crystal and is commonly used to separate nitrogen from oxygen.
Typical Chemical Formula
Na2O . Al2O3 . (2.8±0.2) SiO2 . (6~7)H2O
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 |
≥0.61 |
≥0.61 |
≥0.64 |
≥0.64 |
| Wear ratio |
% |
≤0.10 |
≤0.20 |
≤0.10 |
≤0.10 |
| Crushing strength |
N |
≥30/cm |
≥45/cm |
≥25/piece |
≥65/piece |
| Static water adsorption |
% |
≥23.5 |
≥23.5 |
≥23.5 |
≥23.5 |
| Static CO2 adsorption |
% |
≥18 |
≥18 |
≥18 |
≥18 |
| Water content, as shipped |
% |
≤1.5 |
≤1.5 |
≤1.5 |
≤1.5 |
Application
 Removal of CO2 and moisture from air (air pre-purification) and other gases.
 Separation of enriched oxygen from air.
 Removal of mercaptans and hydrogen sulphide from natural gas.
 Removal of mercaptans and hydrpogen sulphide from hydrocarbon liquid streams (LPG, butane, propane etc.)
 Catalyst protection, removal of oxygenates from hydrocarbons (olefin streams).
 Removal of n-chained compositions from aromatics.
 Production of bulk oxygen in PSA units .
 Production of medical oxygen in small scale oxygen concentrators
Regeneration:
Molecular sieve Type 13X 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 13X 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
13X - 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”.
Insulating Glass Molecular Sievedetail
Introduction
Insulating glass molecular sieve is the product to provide the insulating glass industry with the highest water capacity and lowest gas adsorption for solvent-free systems.
Technical Parameter
| Item |
Unit |
Technical data |
| Shpe |
|
Sphere |
| Diameter |
mm |
0.5-0.8 |
1.0-1.5 |
1.5-2.0 |
| Pore Volume |
Å |
3 |
3 |
3 |
| Bulk density |
g/ml |
0.74-0.80 |
0.72-0.78 |
0.72-0.78 |
| Static water absorption |
% |
≥20.0 |
≥20.0 |
≥20.0 |
| Crushing strength |
N/piece |
≥5 |
≥15 |
≥20 |
| Dust (Turbidity meter) |
ppm |
≤30 |
≤30 |
≤30 |
| Delta T (10 g /10ml) |
℃ |
≥38 |
≥38 |
≥38 |
| Equilibrium N2 capacity |
% |
≤0.2 |
≤0.2 |
≤0.2 |
| Dew point |
℃ |
<-73 |
<-73 |
<-73 |
| Size ratio |
% |
≥98.0 |
≥98.0 |
≥98.0 |
| Water content , as shipped |
% |
<1.5 |
<1.5 |
<1.5 |
Feature
 Very Selective Adsorption
Insulating glass molecular sieve has been designed as a high water capacity adsorbent with the lowest capacity for air or other gases. The highly selective pore structure of assures excellent water dew point protection while eliminating the co-adsorption of gases in the sealed air space.
 Low Deflection
Because insulating glass molecular sieve minimizes pick up of other gases, it reduces adsorbent contribution unit deflection and stress under severe climatic conditions.
 Economy and Performance
It increases gas-filled nit production rates since units can be sealed immediately after filling. In addition, the use of insulating glass molecular sieve maintains unit sound and heating insulation values by minimizing the adsorption of gases from the sealed space.
 Homogeneous and Non-Separating
Unlike blends of two different desiccants that separate because of different component densities,insulating glass molecular sieve is homogeneous and uniform. Each bead is like every other. There’s no need to worry about unit-to-unit variation, which can occur with blends.
 Residual Moisture
Insulating glass molecular sieve is supplied as a fully activated Insulating Glass Adsorbent, ready for use in spacer filling operations.
|
|
|
|
|
|
|
|
|
