MgCO3-crystal-containing mixed matrix membranes with enhanced CO2 permselectivity

Cheol Hun Park, Jae Hun Lee, Eunji Jang, Ki Bong Lee, Jong Hak Kim

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A cost-effective, facile method for simultaneously improving the CO2 permeance and CO2/N2 selectivity of mixed matrix membranes (MMMs) was developed using commercially available MgCO3 microcrystals. The MgCO3 crystals were broken into small pieces and homogenously dispersed in polymer matrices via mechanical stirring to form MMMs. In particular, an amphiphilic comb polymer (CP) composed of poly(ethylene glycol) behenyl ether methacrylate (PEGBEM) and poly(oxyethylene methacrylate) (POEM), i.e., PEGBEM–POEM, was found to be an effective matrix due to the specific interactions between its carbonyl oxygen atoms and MgCO3. The detailed interactions, morphologies, and structures of MgCO3 and CP/MgCO3 hybrids were characterized using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), N2 adsorption-desorption isotherm measurements, wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and Fourier transform infrared (FT-IR) and Raman spectroscopies. The CP/MgCO3 MMM with 45 wt% MgCO3 exhibited the highest CO2/N2 selectivity of 93.8 and CO2 permeance of 30.9 GPU (1 GPU = 10−6 cm3 (STP)/(s·cm2·cmHg)). This performance surpasses other MgCO3 MMMs prepared using commercially available polymers such as PEBAX® (a polyether block amide) and poly(ethylene oxide) (PEO). The improved performance resulted from the enhanced CO2 solubility by MgCO3 crystals, as confirmed by the CO2 uptake measurements.

Original languageEnglish
Pages (from-to)503-512
Number of pages10
JournalChemical Engineering Journal
Volume307
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Polymers
crystal
membrane
Membranes
polymer
Crystals
matrix
Methacrylates
Polyethylene oxides
Microcrystals
ethylene
Polyethers
High resolution transmission electron microscopy
X ray scattering
Polymer matrix
Amides
Ether
Polyethylene glycols
Fourier transform infrared spectroscopy
Isotherms

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Park, Cheol Hun ; Lee, Jae Hun ; Jang, Eunji ; Lee, Ki Bong ; Kim, Jong Hak. / MgCO3-crystal-containing mixed matrix membranes with enhanced CO2 permselectivity. In: Chemical Engineering Journal. 2017 ; Vol. 307. pp. 503-512.
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abstract = "A cost-effective, facile method for simultaneously improving the CO2 permeance and CO2/N2 selectivity of mixed matrix membranes (MMMs) was developed using commercially available MgCO3 microcrystals. The MgCO3 crystals were broken into small pieces and homogenously dispersed in polymer matrices via mechanical stirring to form MMMs. In particular, an amphiphilic comb polymer (CP) composed of poly(ethylene glycol) behenyl ether methacrylate (PEGBEM) and poly(oxyethylene methacrylate) (POEM), i.e., PEGBEM–POEM, was found to be an effective matrix due to the specific interactions between its carbonyl oxygen atoms and MgCO3. The detailed interactions, morphologies, and structures of MgCO3 and CP/MgCO3 hybrids were characterized using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), N2 adsorption-desorption isotherm measurements, wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and Fourier transform infrared (FT-IR) and Raman spectroscopies. The CP/MgCO3 MMM with 45 wt{\%} MgCO3 exhibited the highest CO2/N2 selectivity of 93.8 and CO2 permeance of 30.9 GPU (1 GPU = 10−6 cm3 (STP)/(s·cm2·cmHg)). This performance surpasses other MgCO3 MMMs prepared using commercially available polymers such as PEBAX{\circledR} (a polyether block amide) and poly(ethylene oxide) (PEO). The improved performance resulted from the enhanced CO2 solubility by MgCO3 crystals, as confirmed by the CO2 uptake measurements.",
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MgCO3-crystal-containing mixed matrix membranes with enhanced CO2 permselectivity. / Park, Cheol Hun; Lee, Jae Hun; Jang, Eunji; Lee, Ki Bong; Kim, Jong Hak.

In: Chemical Engineering Journal, Vol. 307, 01.01.2017, p. 503-512.

Research output: Contribution to journalArticle

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