Abstract
This paper reports the preparation of mixed matrix membranes (MMMs) by incorporating a two-dimensional zeolitic imidazolate framework-L (ZIF-L) into a highly gas permeable hydroxyl group-containing polyimide (PI) for hydrogen separation. ZIF-L has a leaf-shaped morphology with excellent CO2 adsorption properties due to strong interaction between ZIF-L and CO2 molecules. The dispersion of ZIF-L crystals in the polymer phase increased CO2 adsorption and restricted CO2 transport through MMMs, resulting in a significant increase of H2 selectivity over CO2. The gas transport properties of MMMs with a ZIF-L loading up to 20 wt% were investigated, and the results showed such MMMs had a H2 permeability of 260 Barrers and ideal H2/CO2 selectivity of 13.4 at room temperature. The membranes presented here have the potential for large-scale fabrication for hydrogen separation applications.
Original language | English |
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Pages (from-to) | 260-266 |
Number of pages | 7 |
Journal | Journal of Membrane Science |
Volume | 549 |
DOIs | |
Publication status | Published - 1 Mar 2018 |
Keywords
- Gas separation
- Hydrogen separation
- Metal organic framework
- Mixed matrix membranes
- Polyimide
- Zeolitic imidazolate framework
- ZIF-L