4A Molecular Sieve

4A molecular sieve is a zeolite-type molecular sieve composed of silicon dioxide (SiO2) and aluminum oxide (Al2O3). Its pore size is approximately 4Å (angstroms), allowing for selective adsorption of molecules smaller than 4Å, such as water molecules, methanol, ethanol, low carbon hydrocarbons, hydrogen sulfide, etc. It is suitable for drying gases and liquids such as air and natural gas.

Product specifications

PropertyTechnical Specifications
Diameter (mm)1.7-2.5 / 3.0-5.01.5-1.7 / 3.0-3.3
Granularity (%)≥96≥98
Bulk density (g/ml)≥0.60≥0.60
Wear rate (%)≤0.20≤0.20
Crush strength (N/granule)≥40≥30
Crush strength variability coefficient≤0.3≤0.3
Static water adsorption (%)≥20.5≥20.5
Static methanol adsorption (%)≥14≥14
Packaging water content (%)≤1.5≤1.5


4A molecular sieve is characterized by its high surface area, regular pore structure, and strong adsorption capacity. It is widely used in the following fields:

  • Air drying
  • Natural gas drying
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