Journal
CHEMOSPHERE
Volume 307, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.136051
Keywords
Gas permeation; Metal-organic frameworks; Mixed matrix membranes; Ln-MOF
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Funding
- King Fahd University of Petroleum and Minerals (KFUPM) [DF181004]
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This study developed mixed matrix membranes (MMMs) with hybrid organic-inorganic characteristics by incorporating lanthanum-Metal Organic Frameworks (La-MOFs) into Matrimid. The MMMs exhibited enhanced CO2 permeation and selectivity with increasing loading of the nano-filler. The results suggest that these membranes have potential for important applications in gas separation industries.
Mixed Matrix Membranes (MMMs) with hybrid organic-inorganic characteristics offer a strong alternative to traditional polymer-based membranes to reduce the trade-off between gas permeability and selectivity. This work incorporated lanthanum-Metal Organic Frameworks in the Matrimid to fabricate MMMs. To understand the effects of nano-filler on membranes' morphology, porosity, thermal stability, and chemical composition, MMMs were fabricated with three different loadings of nano-filler, i.e., 10, 20 and 30 wt%. The selectivity and permeability of CH4, CO2, and N-2 gases through MMMs were investigated at 10 bar pressure and temperatures ranging from 25 to 55 C. All MMMs exhibited enhanced CO2 permeation with increased nano-filler loading because the porous nano-filler provided additional channels and fractional free volume in the polymer matrix. The 30 wt% loaded membrane showed a 183% increase in permeability of CO2 than neat membrane. With increasing nano-filler loading, the selectivity of MMMs increased from 34.1 to 48.45 for CO2/N-2 and from 36.2 to 54.67 for CO2/CH4, confirming the absence of membrane defects, improved filler/polymer interface, and excellent dispersion of nano-filler in the polymer matrix. The results proved that these membranes could be further used for gas separation industrial applications.
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