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Updated: Feb 5, 2026

Organic Structure-directing Agent-free Synthesis for *BEA-type Zeolite Membrane
Published on: February 22, 2020
One-Pot Synthesis of High-Flux b-Oriented MFI Zeolite Membranes for Xe Recovery
Xuerui Wang1, Pelin Karakiliç2, Xinlei Liu1
1Chemical Engineering Department , Delft University of Technology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands.
Abstract:
We demonstrate that b-oriented MFI (Mobil Five) zeolite membranes can be manufactured by in situ crystallization using an intermediate amorphous SiO2 layer. The improved in-plane growth by using a zeolite growth modifier leads to fusion of independent crystals and eliminates boundary gaps, giving good selectivity in the separation of CO2/Xe mixtures. The fast diffusion of CO2 dominates the overall membrane selectivity toward the CO2/Xe mixture. Because of the straight and short [010] channels, the obtained CO2 permeation fluxes are several orders of magnitude higher than those of carbon molecular sieving membranes and polymeric membranes, opening opportunities for Xe recovery from waste anesthetic gas.
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