Molecular Sieve: Key Material for Efficient Adsorption and Gas Separation

Molecular sieve are crystalline porous materials with highly uniform pore structures and selective adsorption capabilities. They play a vital role in gas purification, dehydration, and separation processes across various industries. By distinguishing molecules based on size and polarity, molecular sieve enable efficient removal of moisture, carbon dioxide, and other impurities.

Classified by pore size, common types include 3A, 4A, 5A, and 13X:

3A molecular sieve is ideal for dehydrating polar solvents like ethanol, producing ultra-dry ethanol with water content below 0.01%.

4A molecular sieve is widely used for drying air, natural gas, pharmaceuticals, and chemical processing.

5A molecular sieve is effective for separating normal paraffins from isomers and removing CO₂ and H₂O in various industrial gases.

13X molecular sieve with a larger pore size, is perfect for deep purification of natural gas, LPG, and air separation units.

In industrial dryers, molecular sieves are often combined with activated alumina. Alumina handles pre-drying under high humidity, while molecular sieves achieve ultra-low dew points below -70°C, ensuring complete moisture removal.

In gas treatment systems such as PSA (Pressure Swing Adsorption), 13X-APG molecular sieves can reduce moisture to below 0.1 PPM and CO₂ to below 1 PPM—meeting the strict purity requirements of LNG production.

Whether in petrochemicals, energy, or environmental applications, molecular sieves offer reliable, efficient, and sustainable solutions for gas drying and separation.

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