TY - JOUR
T1 - Metal-organic framework/graphene oxide composite fillers in mixed-matrix membranes for CO2 separation
AU - Anastasiou, Stavroula
AU - Bhoria, Nidhika
AU - Pokhrel, Jeewan
AU - Kumar Reddy, K. Suresh
AU - Srinivasakannan, C.
AU - Wang, Kean
AU - Karanikolos, Georgios N.
N1 - Funding Information:
Stavroula Anastasiou acknowledges the Petroleum Institute (PI) for a Graduate Studies (MSc) fellowship. Financial support by the Gas Research Center (GRC) of Abu Dhabi (project GRC16002 ) is greatly appreciated. We thank Shairoz Khan, Samuel Stephen, Tharalekshmy Anjana, Sabna Khadar, and Prasanth Thiyagarajan for assistance with material characterization.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/6/15
Y1 - 2018/6/15
N2 - Mixed-matrix membranes (MMMs) comprising of inorganic fillers dispersed in an organic matrix gather increased attention for separating gas mixtures due to potential for enhancement in separation selectivity, throughput, and material robustness. In the present study, ZIF-8 metal-organic framework (MOF) and ZIF-8/graphene oxide (GO) hybrid nanofillers were developed and incorporated into polysulfone (PSF) matrix. The fillers and the resulting MMMs were evaluated for their structural, morphological, and sorption characteristics, while the prepared membranes were tested for their permeation and selectivity properties for CO2, N2 and CH4. It is highlighted that, compared to the pristine PSF membrane, the PSF+(ZIF-8/GO) MMMs showed both enhanced CO2 permeability (up to an increase of 87%), and selectivity (up to an increase of 61% for the CO2/CH4 pair). In addition, the selectivity for the PSF+(ZIF-8/GO) MMM was increased by up to 7-fold compared to that of the PSF + ZIF-8 MMM. Based on the results reported, composite fillers combining the functionality of MOFs and GO have the potential to tune and boost the performance of polymeric membranes for CO2 separation from hydrocarbon gases, flue gas, and related gas mixtures.
AB - Mixed-matrix membranes (MMMs) comprising of inorganic fillers dispersed in an organic matrix gather increased attention for separating gas mixtures due to potential for enhancement in separation selectivity, throughput, and material robustness. In the present study, ZIF-8 metal-organic framework (MOF) and ZIF-8/graphene oxide (GO) hybrid nanofillers were developed and incorporated into polysulfone (PSF) matrix. The fillers and the resulting MMMs were evaluated for their structural, morphological, and sorption characteristics, while the prepared membranes were tested for their permeation and selectivity properties for CO2, N2 and CH4. It is highlighted that, compared to the pristine PSF membrane, the PSF+(ZIF-8/GO) MMMs showed both enhanced CO2 permeability (up to an increase of 87%), and selectivity (up to an increase of 61% for the CO2/CH4 pair). In addition, the selectivity for the PSF+(ZIF-8/GO) MMM was increased by up to 7-fold compared to that of the PSF + ZIF-8 MMM. Based on the results reported, composite fillers combining the functionality of MOFs and GO have the potential to tune and boost the performance of polymeric membranes for CO2 separation from hydrocarbon gases, flue gas, and related gas mixtures.
KW - Carbon dioxide
KW - Fillers
KW - Graphene oxide
KW - Membrane
KW - MOFs
KW - PSF
KW - ZIF-8
UR - http://www.scopus.com/inward/record.url?scp=85047484451&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2018.03.064
DO - 10.1016/j.matchemphys.2018.03.064
M3 - Article
AN - SCOPUS:85047484451
SN - 0254-0584
VL - 212
SP - 513
EP - 522
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -