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Increased Selectivity in CO 2 /CH 4 Separation with Mixed‐Matrix Membranes of Polysulfone and Mixed‐MOFs MIL‐101(Cr) and ZIF‐8
Author(s) -
Tanh Jeazet Harold B.,
Sorribas Sara,
RománMarín José M.,
Zornoza Beatriz,
Téllez Carlos,
Coronas Joaquín,
Janiak Christoph
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201600190
Subject(s) - polysulfone , chemistry , selectivity , membrane , metal organic framework , permeation , gas separation , chemical engineering , nuclear chemistry , analytical chemistry (journal) , chromatography , organic chemistry , adsorption , catalysis , biochemistry , engineering
Combination of two hydrothermally stable MOFs MIL‐101(Cr) and ZIF‐8 in a 1:1 ratio in a polysulfone (PSF) mixed‐matrix membrane (MMM) showed a significant higher selectivity in mixed‐gas CO 2 /CH 4 permeation tests for 16 wt.‐% MIL‐101(Cr)/ZIF‐8 compared to analogous single‐filler MMMs [MIL‐101(Cr) or ZIF‐8] or to the also tested combination NH 2 ‐MIL‐53(Al)/ZIF‐8 (1:1 ratio). The CO 2 /CH 4 selectivity increased significantly from 23 to 40 from pure PSF to the 16 wt.‐% MIL‐101(Cr)/ZIF‐8 membrane. Separation of CO 2 /CH 4 is relevant for purification (“sweetening”) of natural gas (CH 4 as main component) which is soured with up to over 40 % CO 2 and N 2 and only useable at low CO 2 concentrations.