TY - JOUR
T1 - Poly(ionic liquid)-based engineered mixed matrix membranes for CO
2
/H
2
separation
AU - Nabais, Ana R.
AU - Martins, Ana P. S.
AU - Alves, Vítor D.
AU - Crespo, João G.
AU - Marrucho, Isabel M.
AU - Tomé, Liliana C.
AU - Neves, Luísa A.
N1 - info:eu-repo/grantAgreement/FCT/5876/147270/PT#
info:eu-repo/grantAgreement/FCT/5876/147216/PT#
info:eu-repo/grantAgreement/FCT/5876/147218/PT#
This work was partially supported by R&D Units UID/Multi/04551/2013 (Green -it), UID/QUI/00100/2013 (CQE), and the Associated Laboratory Research Unit for Green Chemistry, Technologies and Clean Processes, LAQV which is financed by national funds from FCT/MCTES (UID/QUI/50006/2013) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). Ana R. Nabais, Luisa A. Neves and Liliana C. Tome acknowledge FCT/MCTES for financial support through project PTDC/CTM-POL/2676/2014, FCT Investigator Contract IF/00505/2014 and Post -doctoral research grant SFRH/BDP/101793/2014, respectively. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 745734.
PY - 2019/9/1
Y1 - 2019/9/1
N2 -
Poly(ionic liquid)s (PIL) have emerged as a class of versatile polyelectrolites, that can be used to prepare new materials able to achieve superior performances compared to conventional polymers. The combination of PILs with ionic liquids (ILs) may serve as a suitable matrix for the preparation of membranes for gas separation. In this work, mixed matrix membranes (MMMs) combining a pyrrolidinium-based PIL, an IL and three highly CO
2
-selective metal organic frameworks (MOFs) were prepared. The different MOFs (MIL-53(Al), Cu
3
(BTC)
2
and ZIF-8) were used as fillers, aiming to maximize the membranes performance towards the purification of syngas. The influence of different MOFs and loadings (0, 10, 20 and 30 wt%) on the thermal and mechanical stabilities of the membranes and their performance in terms of CO
2
permeability and CO
2
/H
2
ideal selectivity was assessed. The compatibility between the materials was confirmed by SEM-EDS and FTIR spectroscopy. The prepared MMMs revealed to be thermally stable within the temperature range of the syngas stream, with a loss of mechanical stability upon the MOF incorporation. The increasing MOF content in the MMMs, resulted in an improvement of both CO
2
permeability and CO
2
/H
2
ideal selectivity. Among the three MOFs studied, membranes based on ZIF-8 showed the highest permeabilities (up to 97.2 barrer), while membranes based on MIL-53(Al) showed the highest improvement in selectivity (up to 13.3). Remarkably, all permeation results surpass the upper bound limit for the CO
2
/H
2
separation, showing the membranes potential for the desired gas separation.
AB -
Poly(ionic liquid)s (PIL) have emerged as a class of versatile polyelectrolites, that can be used to prepare new materials able to achieve superior performances compared to conventional polymers. The combination of PILs with ionic liquids (ILs) may serve as a suitable matrix for the preparation of membranes for gas separation. In this work, mixed matrix membranes (MMMs) combining a pyrrolidinium-based PIL, an IL and three highly CO
2
-selective metal organic frameworks (MOFs) were prepared. The different MOFs (MIL-53(Al), Cu
3
(BTC)
2
and ZIF-8) were used as fillers, aiming to maximize the membranes performance towards the purification of syngas. The influence of different MOFs and loadings (0, 10, 20 and 30 wt%) on the thermal and mechanical stabilities of the membranes and their performance in terms of CO
2
permeability and CO
2
/H
2
ideal selectivity was assessed. The compatibility between the materials was confirmed by SEM-EDS and FTIR spectroscopy. The prepared MMMs revealed to be thermally stable within the temperature range of the syngas stream, with a loss of mechanical stability upon the MOF incorporation. The increasing MOF content in the MMMs, resulted in an improvement of both CO
2
permeability and CO
2
/H
2
ideal selectivity. Among the three MOFs studied, membranes based on ZIF-8 showed the highest permeabilities (up to 97.2 barrer), while membranes based on MIL-53(Al) showed the highest improvement in selectivity (up to 13.3). Remarkably, all permeation results surpass the upper bound limit for the CO
2
/H
2
separation, showing the membranes potential for the desired gas separation.
KW - Hydrogen purification
KW - Metal organic frameworks
KW - Mixed matrix membranes
KW - Poly(Ionic Liquids)
UR - http://www.scopus.com/inward/record.url?scp=85064217182&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2019.04.018
DO - 10.1016/j.seppur.2019.04.018
M3 - Article
AN - SCOPUS:85064217182
SN - 1383-5866
VL - 222
SP - 168
EP - 176
JO - Separation and Purification Technology
JF - Separation and Purification Technology
ER -