How to activate molecular sieves
2023-09-13
To activate molecular sieves, the basic requirement is exposure to ultra-high temperatures, and the heat must be sufficient to evaporate the adsorbed substances. The temperature varies depending on the type of material adsorbed and the adsorbent. The sieve types discussed earlier require a constant temperature range of 170-315 °C (338-600 °F). Both the adsorbed material and the adsorbent are heated at this temperature. Vacuum drying is a faster method and requires relatively lower temperatures compared to flame drying.
After activation, the sieves can be stored in glass containers with double-sealed membranes. This will keep them activated for up to six months. To check if the sieves are active, you can wear gloves, hold them in your hand, and add water to them. If they are fully active, the temperature will rise significantly, making them difficult to hold even with gloves on.
It is recommended to use safety equipment such as PPE kits, gloves, and safety glasses because the activation process of molecular sieves involves handling high temperatures and chemicals along with associated risks.
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