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Mixed matrix membranes based on 6FDA polyimide with silica and zeolite microsphere dispersed phases
Author(s) -
Zornoza Beatriz,
Téllez Carlos,
Coronas Joaquín,
Esekhile Omoyemen,
Koros William J.
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15011
Subject(s) - barrer , permeation , zeolite , membrane , polyimide , selectivity , chemical engineering , gas separation , mesoporous silica , materials science , mesoporous material , polymer , matrix (chemical analysis) , chemistry , polymer chemistry , nanotechnology , organic chemistry , composite material , catalysis , biochemistry , layer (electronics) , engineering
Mixed matrix membranes (MMMs) prepared with 6FDA‐DAM polymer using ordered mesoporous silica MCM‐41 spheres (MSSs), Grignard surface functionalized MSSs (Mg‐MSSs) and hollow zeolite spheres are studied to evaluate the effects of surface modification on performance. Performance near or above the so‐called permeability‐selectivity trade‐off curve was achieved for the H 2 /CH 4 , CO 2 /N 2 , CO 2 /CH 4, and O 2 /N 2 systems. Two loadings (8 wt % and 16 wt %) of MSSs were tested using both constant volume and Wicke–Kallenbach sweep gas permeation systems. Besides single gas H 2 , CO 2 , O 2 , N 2 , and CH 4 tests, mixed gas (50/50 vol %) selectivities were obtained for H 2 /CH 4 , CO 2 /N 2 , CO 2 /CH 4 , and O 2 /N 2 and found to show enhancements vs. single gases for CO 2 including cases. Mg‐MSS/6FDA‐DAM was the best performing MMM with H 2 /CH 4 , CO 2 /N 2 , CO 2 /CH 4 , and O 2 /N 2 separation selectivities of 21.8 (794 Barrer of H 2 ), 24.4 (1214 Barrer of CO 2 ), 31.5 (1245 Barrer of CO 2 ), and 4.3 (178 Barrer of O 2 ), respectively. © 2015 American Institute of Chemical Engineers AIChE J , 61: 4481–4490, 2015