.jpg)
5A molecular sieve, with its 5A pore size (approximately 5Å), is widely used in gas drying, separation, and purification due to its excellent adsorption performance for polar molecules. Mastering its usage method is crucial for optimal application. First, activation is essential before use. Heat the 5A molecular sieve at 200-300°C for 8-12 hours under vacuum or inert gas to remove adsorbed moisture and impurities, restoring its adsorption capacity. Next, packing. Use a uniform and gentle method to fill the 5A molecular sieve into the tower. Avoid excessive compression to prevent pore blockage or particle breakage. The packing density should be controlled based on the tower size and gas flow rate, generally 0.6-0.8 g/cm³. Proper tower internal selection is also important. For example, use sieve plates or gas distribution plates as tower internals to ensure uniform gas distribution, reducing channeling and improving mass transfer efficiency. During operation, maintain appropriate temperature and pressure. Typically, the operating temperature ranges from 20-200°C, and pressure should not exceed the sieve's tolerance. Monitor the adsorption performance regularly; when breakthrough occurs, regenerate the sieve by heating to 200-300°C and purging with inert gas. Regular maintenance, such as checking tower internals for clogging and replacing damaged sieve, ensures long-term stable operation. Correct usage of 5A molecular sieve maximizes its service life and efficiency in industrial gas processing.
