Molecular Sieves

Molecular Sieves by B.F.S

Precision Drying and Purification with Synthetic Zeolite Technology

B.F.S offers a full range of high-performance Molecular Sieves, engineered for the efficient removal of moisture, CO₂, and other small molecules from gas and liquid streams. Our molecular sieves are based on synthetic crystalline aluminosilicates (zeolites) that provide uniform micropores with precise size exclusion capabilities. This allows for selective adsorption, ultra-low residual moisture levels, and exceptional thermal stability across industrial applications.

What Are Molecular Sieves?

Molecular Sieves are porous materials with uniform pore sizes—typically 3Å, 4Å, 5Å, and 13X—that selectively adsorb molecules based on size, polarity, and saturation pressure. These materials are especially effective at adsorbing water vapor, making them ideal for deep drying applications where conventional desiccants (e.g., silica gel, alumina) are insufficient.

Key Features

✅ Precise Pore Sizes (3A, 4A, 5A, 13X) Selective removal of water, CO₂, H₂S, alcohols, and hydrocarbons based on molecular diameter.
✅ Very Low Residual Moisture Reduces water levels down to <1 ppm in gases and solvents.
✅ High Adsorption Capacity Consistent performance under high humidity or pressure conditions.
✅ Regenerable Thermal regeneration (200–350°C) or pressure swing (PSA) cycles possible for extended use.
✅ Wide Chemical Compatibility Suitable for hydrocarbons, air, natural gas, refrigerants, solvents, and more.

Applications

Molecular sieves from B.F.S are widely used in:

Natural Gas & Biogas Drying Removal of H₂O and CO₂ to prevent hydrate formation and corrosion.
Petrochemical & Refining Processes Drying of cracked gases, LPG, reformate, and feedstocks.
Air Separation Units (ASU) Deep drying of compressed air prior to cryogenic separation.
Solvent & Ethanol Dehydration Especially with 3A sieves, which exclude ethanol and remove only water.
Pharmaceuticals & Specialty Chemicals Drying of polar and non-polar solvents without decomposition.
Insulated Glass & Packaging Prevents fogging and moisture damage in sealed units.

Product Grades Available

Type	Pore Size	Target Molecules
3A	3 Å	H₂O (excludes ethanol, methanol)
4A	4 Å	H₂O, NH₃, CO₂
5A	5 Å	H₂O, CO₂, H₂S, n-paraffins
13X	~10 Å	H₂O, CO₂, mercaptans, aromatics

Physical Specifications (Typical)

Property	Value
Form	Beads or pellets
Particle Size	1.6–5 mm (customizable)
Bulk Density	0.60 – 0.70 g/cm³
Crush Strength	≥ 30 N (for beads)
Equilibrium Moisture	≥ 20–22 wt% (4A, 5A)
Regeneration Temp	200–350°C