Zeolite Membranes for Gas Separation

小行星9360195 多孔无机膜可以在高温下使用，并且具有高通量、机械强度和化学稳定性。 目前市售的无机膜具有大孔（40 A）、宽孔径分布，非常适合从液体流中去除高分子量组分（超滤）。 然而，因为这些膜在努森扩散下操作，所以它们的分离系数对于用于气体分离来说太低。 另一方面，沸石膜具有小得多的孔和良好限定的孔径分布。 因为它们通过分子筛分离分子，所以它们提供非常高的选择性。 不幸的是，虽然沸石膜的潜力早已被认识到，但仍然没有合适的加工方法，通过该方法可以制造致密的自立式或支撑式膜。 在第一阶段，TDA将使用一种新的合成方法在Si）2和Al 2 O3基底上制备ASM-5沸石膜，然后表征所得膜的化学组成、形貌、热稳定性和离子交换能力。 ***

9360195 Jiang Porous inorganic membranes can be used at high temperatures, and have high fluxes, mechanical strength and chemical stability. Today's commercially available inorganic membranes have large pores (40 A), a wide pore size distribution and are ideally suited for removing high molecular weight components from a liquid stream (ultrafiltration). However, because these membranes operate on Knudsen diffusion, their separation coefficients are far too low for use in gas separations. On the other hand, zeolite membranes have much smaller pores and a well defined pore size distribution. since they separate molecules by molecular sieving, they offer very high selectivity. Unfortunately, while the potential of zeolite membranes has long been recognized, there is still no suitable processing method by which either dense free standing or supported membranes can be made. In Phase I, TDA will prepare ASM-5 zeolite film on Si)2 and Al2O3 substrates using a novel synthetic method, and then characterize the chemical composition, morphology, thermal stability and ion-exchange ability of the resulting films. ***