Molecular sieve membrane technology
Molecular sieve pervaporation membrane uses molecular sieve as the membrane material, and uses its regular pores to realize the separation between different components. NaA type inorganic molecular sieve pervaporation membrane is a layer of tightly packed membrane formed by NaA type molecular sieve particles on a tubular ceramic porous support through crystal growth (growth). The pore size is about 4.2A, which is larger than the kinetic diameter of water molecules (~ 2.9A) and smaller than the molecular diameter of most organic substances, showing good shape selectivity for water molecules. On the other hand, the high aluminum content (Si/Al = 1) in the molecular sieve framework makes it extremely hydrophilic, making the NaA type inorganic molecular sieve pervaporation membrane particularly suitable for organic solvent dehydration.
Product advantages:
According to the characteristics of the proposed separation material system, the molecular sieve membrane with controllable performance is prepared by pre-treatment of ceramic support, seed crystal, coating method, composition of membrane synthesis raw materials and control of membrane synthesis process parameters.
Product performance:
At 75°C, for a 90 wt% ethanol feed, the separation factor of the prepared membrane is> 10000 and the membrane permeation flux is> 3 kg/m.2h. Product performance has reached the international advanced level.
NaA molecular sieve membrane SEM
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