Work

para‐Xylene Ultra‐selective Zeolite MFI Membranes Fabricated from Nanosheet Monolayers at the Air–Water Interface

Year: 2017

Type: article

Abstract: The control of membrane morphology and microstructure is crucial to improve the separation performance of molecular-sieve membranes. This can be enabled by making thin, dense, and uniform seed-crystal coatings, which are then intergrown into continuous membranes. Herein, we show a novel and simple floating particle coating method can give closely packed monolayers of zeolite nanosheets on nonporous or porous supports. The zeolite nanosheet monolayer is formed at the air-water interface in a conical Teflon trough. As the water in the trough is drained, the monolayer is deposited on a support placed below. Membranes prepared by gel-free secondary growth of the nanosheets deposited by this method show unprecedented ultra-selective performance for separation of para- from ortho-xylene (separation factor >10 000).

Source: Angewandte Chemie International Edition

DOI: 10.1002/anie.201708835

Authors: Donghun Kim, Mi Young Jeon, Benjamin L. Stottrup, Michael Tsapatsis

Institutions: University of Minnesota, University of Minnesota System, Augsburg University

Language: English

Topic: Membrane Separation and Gas Transport

Subfield: Filtration and Separation

Field: Chemical Engineering

Domain: Physical Sciences

Open Access status: green