Abstract A new seeding method for the secondary growth of zeolite membrane, dry rolling, was applied to synthesize SAPO-34 zeolite membrane. In dry rolling, seeds are introduced on the outer surface of tubular support by mechanically rolling support in a cylindrical container with dry seed particles. During the process, plate-like SAPO-34 seeds fractured into smaller particulates which were uniformly distributed on the support and partially infiltrated into the pores of the support. The low speed and long seeding provided a more homogeneous seed layer due to uniform distribution of fractured tiny seeds and no mechanical damage of support. The homogeneous seed coating reliably developed SAPO-34 separation layer with better performance during the secondary growth process compared with conventional manual rubbing. The membrane synthesized at an optimum condition showed N2/CH4 permselectivity of 4.38 and N2 and CH4 permeance of 399 and 91 GPU, respectively. The performance was comparable or better than generally reported single gas performance, but the performance reliability was much better. Therefore, it could be concluded that dry rolling can be one of the reliable seeding processes for the preparation of zeolite membranes.

中文翻译：

---

一种新的播种方法，干轧法合成用于氮/甲烷分离的SAPO-34沸石膜

摘要 采用一种新型的沸石膜二次生长播种法干轧法合成SAPO-34沸石膜。在干轧中，种子通过在圆柱形容器中的机械滚动支撑物被引入管状支撑物的外表面上，该支撑物带有干燥的种子颗粒。在此过程中，片状 SAPO-34 种子破碎成较小的颗粒，均匀分布在载体上并部分渗入载体的孔隙中。由于破碎的微小种子分布均匀且支撑物没有机械损伤，因此低速和长播种提供了更均匀的种子层。与传统的手工揉搓相比，均匀的种子包衣在二次生长过程中可靠地形成了具有更好性能的 SAPO-34 分离层。在最佳条件下合成的膜显示 N2/CH4 渗透选择性为 4.38，N2 和 CH4 渗透性分别为 399 和 91 GPU。性能与一般报道的单一气体性能相当或更好，但性能可靠性要好得多。因此，可以得出结论，干轧可以是制备沸石膜的可靠晶种工艺之一。