Zeolite molecular sieve mechanism of action

The first effect of the zeolite molecular sieve is that the outer surface of the crystal adsorbs a variety of adsorbates. Studies on zeolite molecular sieves have shown that the outer surface provides a precisely adsorbed molecular size. If the adsorbed molecule exceeds this size, it cannot enter the interior of the crystal and can only be adsorbed on the outer surface. Surface adsorption (which also occurs on non-crystalline surfaces such as silica gel) is very weak, and there are thousands of crystal voids and troughs inside the crystal to further adsorb molecules. Zeolites are composed of silicon, aluminum and oxygen atoms. The sum of the ionic charges of these molecules in a stable crystal should be zero. To balance positive and negative loads, positive ions such as potassium, sodium, and calcium are added. The huge surface with positive and negative ions is called an adsorption field. There is a strong attraction between the adsorbate and the adsorbate, which requires a lot of energy (usually thermal energy) to eliminate the attraction and reduce it to a sieve. As the concentration of the adsorbed material increases, the density charge field increases so that few adsorbed molecules are present. Eventually, the adsorbate is near full capacity and the hole is filled, similar to capillary condensation. If both water and benzene (for example) molecules enter the 13X crystal, they all have the same opportunity to find a charge field that is adsorbed into the crystal because both molecules have polarity. However, some molecules such as nitrogen and argon have weak polarities and they may be weakly adsorbed on the crystals and are easily replaced when large amounts of polar molecules are poured in. During the adsorption of molecular sieves, the thermal energy is released to the surroundings. All of the molecular sieves we have mentioned now absorb 20% of their weight in water at room temperature. Insulating glass units filled with zeolite molecular sieves can reach -100 with very few grams of desiccant. Low dew point of F (-70°C).

The substances that can be absorbed by the desiccant in the hollow glass sealing unit include water, air, argon, helium, neon, sulfur hexafluoride, and organic solvents. The spacers were filled with argon, helium, neon, and sulfur hexafluoride gas to improve the U value and noise reduction performance of the hollow glass. The organic solution may come from the sealant, cutting oil, and paint inside the Magna. Type 3A only absorbs water, Type 4A absorbs water, air, argon, and helium; it does not absorb cesium, sulfur hexafluoride, and solvents. 13 X and silica gel absorb all of these substances.