Product Information

4A Molecular Sieve

Product Name: 4A Molecular Sieve
Model: 4A
Exhibitors: other brand
Product Documentation: No Related Documents

Brief

4A Molecular Sieve 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  A detailed description of

Introduction
4A Molecular Sieve is an alkali alumino silicate; 4A Molecular Sieve 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. 4A Molecular sieve can adsorb 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
4A Molecular Sieve Drying and removing of CO2 from natural gas, LPG, air, inert and athmospheric gases, etc.
4A Molecular Sieve Removal of hydrocarbons, ammonia and methanol from gas streams
(ammonia syn gas treating)
4A Molecular Sieve Special types are used in the air break units of buses, trucks and locomotives.
4A Molecular Sieve Packed in small bags, it may be used simply as a packaging desiccant.

Regeneration
Naike 4A molecular sieve 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 molecular sieve 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”.
 

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