Dual?templating surface gel into thin SSZ?13 zeolite membrane for fast selective hydrogen separation

Highly permeable zeolite membranes are desirable for fast gas separation in the industry. Reducing membrane's thickness is deemed to be an optimal solution permeability improvement. Herein, we report synthesis route of thin SSZ-13 via conversion template-contained surface gels. The gel fully crystallized into crack-free assisted with dual templates N,N,N-trimethyl-1-adamantammonium hydroxide (TMAdaOH) and tetraethylammonium (TEAOH). specific functions TMAdaOH structure directing TEAOH crystallization regulating well discussed. Thin layer impregnated onto porous alumina subsequent a 500 nm thick membrane. This submicron-thick membrane exhibits high H2 permeance 50 × 10?8 mol s?1 m?2 Pa?1 during hydrogen separation. Meanwhile, factors retained around 23.0 31.5 H2/C2H6 H2/C3H8, respectively. approach offers possibility obtaining high-quality efficient