4A Molecular Sieve

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4A Molecular Sieve

Molecular sieve 4A, also called zeolite 4A or zeolith 4A, is one type of aluminosilicate crystal with average pores measuring of 4 angstrom (0.4 nm). Molecular with kinetic diameter larger than 4 angstrom will be adsorbed by zeolite 4A, otherwise be excluded.
Zeolite 4A molecular sieves are typically used for dehydration in air break system, natural gas drying.

zeolite for cryogenic air separation

Technical Specifications

Item Type Diameter Static H₂O Adsorption Bulk Density Crush Strength Loss on Attrition Package Moisture
4A Bead 1.6—2.5 ≥22.5 ≥0.74 ≥40 ≤0.1 ≤1.5%wt
3—5 ≥22.5 ≥0.72 ≥80 ≤0.1 ≤1.5%wt
4A Pellet 1/16″ ≥22.5 ≥0.66 ≥40 ≤0.2 ≤1.5%wt
1/8″ ≥22.5 ≥0.66 ≥80 ≤0.3 ≤1.5%wt
Unit mm %wt  g/ml N %wt %wt
Note RH75%,25℃ Settled Average 575℃,1hr

Major Applications

Natural Gas

Natural gas must be dehydrated to remove water vapor. Water vapor causes the formation of hydrates, over saturation of natural gas, and corrosion of equipment. The high pressure increases saturation and creates more water vapor. Hydrates cause freezing and blocking of pipelines, valves, and other equipment, bringing production to a halt. Oversaturated gas does not meet pipeline specifications, which must be removed in order to sell.

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Natural Gas

Air Drying

As a process, air drying takes away the moisture from the air, keeping the machinery and equipment running uninterrupted.

This is an energy-efficient and cost-effective method of maintaining moisture levels within the area, which can help reduce production and maintenance costs.

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molecular sieve air drying

Zeolite 4A Molecular Sieve Storage and Regeneration

  • Storage

    The product should be stored in original pack or air-proof package in cool and dry conditions should not be left exposed to open air.

  • Regeneration

    Molecular sieve 4A can be regenerated by increasing temperature or reducing the pressure.

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