Preparation and characterization of CO₂‐selective Pebax/NaY mixed matrix membranes

Abstract

CO 2 -selective Pebax/NaY mixed matrix membranes (MMMs) were prepared by incorporating NaY zeolite into Pebax matrix. The morphology, chemical groups, thermal stability, and microstructure of the MMMs were investigated by scanning electron microscope, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction, respectively. The effects of zeolite loading amount, permeation temperature and pressure on the CO 2 /N 2 separation performance of the resultant membranes were studied. The as-prepared MMMs are much superior to the pristine Pebax membranes in terms of permeability and selectivity. The CO 2 permeability and CO 2 /N 2 selectivity can respectively reach to 131.8 Barrer and 130.8 for MMMs made by the starting materials containing 40 wt % NaY.

Thin Film Mixed Matrix Hollow Fiber Membrane Fabricated by Incorporation of Amine Functionalized Metal-Organic Framework for CO2/N2 Separation

“…The performance of the prepared Pebax ® 2533-UiO-66-NH 2 /PP thin film mixed matrix hollow fiber membranes were compared with Pebax ® -based mixed matrix membranes containing various types of fillers ( Table 1 ). The gas separation performance of Pebax ® 2533-UiO-66-NH 2 /PP thin film mixed matrix hollow fiber membrane containing 10 wt% UiO-66-NH 2 is comparable with previous reported Pebax ® -based mixed matrix membranes containing various types of fillers in literature [ 14 , 33 , 40 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. The prepared membrane shows a high CO 2 /N 2 ideal selectivity equal to 37 with a CO 2 permeance 25.81 GPU at feed pressure 2 bar.…”

Comparison of micro‐ and nano‐sized CuBTC particles on the CO2/CH4 separation performance of PEBA mixed matrix membranes

“…The peak of neat PEBA at 1094 cm −1 referred to the stretching vibration of the C‐O‐C group within the PEO segment. The PA segment also exhibited some relatively sharp peaks at around 3297, 1636 and 1730 cm −1 corresponding to ‐N‐H‐, H‐N‐C=O and O‐C=O groups (respectively) in the hard PA segment 25–53 . Despite the slight differences in membrane preparation methods, the spectra of the two series of membranes were consistent; indicating no reaction of CuBTC.ns with the solvent and no creation of new functional groups.…”

“…PEBA 1657, a polyether block amide composed of 40% polyamide (PA) and 60% polyethylene oxide (PEO), was selected as the polymer material. The impacts of different fillers including MOFs, [25][26][27][28][29][30] carbon nanotubes, 31,32 zeolites, [33][34][35] and other 2D and 3D inorganic materials [36][37][38] were investigated to enhance the CO 2 \CH 4 separation properties of PEBA. It is expected that the flexible structure of polymer chains displays sufficient compatibility with the particles to prohibit sieve-in-a-cage and rigidification defects at the polymer-particle interface.…”

Synthesis and gas permeation properties of thermally rearranged poly(ether-benzoxazole)s with low rearrangement temperatures

“…This result is consistent with some literature reports. [50][51][52] This can be rationalized by a decrease in gas solubility coefficient with pressure as is typically observed in glassy polymers due to their dual-mode sorption behavior.…”