One-Pot Synthesis of High-Flux b-Oriented MFI Zeolite Membranes for Xe Recovery.

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.

SUBMITTER: Wang X 

PROVIDER: S-EPMC6328236 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature