Solid-state facilitated transport of carbon monoxide through mixed matrix membranes

Cheol Hun Park, Jae Hun Lee, Na Un Kim, Chang In Kong, Jeong Hoon Kim, Jong Hak Kim

Research output: Contribution to journalArticle

Abstract

Carbon monoxide (CO), along with CO2 and N2, forms a significant byproduct gas from steel mills. Here, we report, for the first time to the best of our knowledge, solid-state facilitated transport of CO based on mixed matrix membrane (MMM) consisting of comb copolymer-silver salt-MgO nanosheet (MgO-NS) complexes as solid-state CO carriers for the separation of CO/N2 and CO/CO2 mixtures. In particular, the structure and composition of the comb copolymer are crucial to membrane operation, and the desired structure is achieved by synthesizing poly(ethylene glycol) behenyl ether methacrylate-poly(methacrylic acid) (PEGBEM-PMA) comb copolymer. Subsequently, we compare its gas separation performance with those of poly(ethylene glycol) behenyl ether methacrylate-poly(oxyethylene methacrylate) (PEGBEM-POEM) comb copolymer and the commercial PEBAX block copolymer. The use of MgO-NS as the metal oxide enhances the activity and stability of silver ions via electrostatic interactions. We find that the PEGBEM-PMA membrane with a 7:3 wt ratio of AgBF4 and MgO-NS exhibits the highest CO separation performance with a CO permeance of 79 GPU (1 GPU = 10−6 cm3 (STP)/(s·cm2·cmHg)), CO/N2 selectivity of 14.7, and CO/CO2 selectivity of 12.0, which is the highest CO separation performance ever reported. The observed high CO/CO2 selectivity is an anomalous behavior that results from increased CO solubility by silver ions stabilized by MgO-NS and decreased CO2 permeance due to the presence of CO2-phobic PMA chains.

Original languageEnglish
Article number117373
JournalJournal of Membrane Science
Volume592
DOIs
Publication statusPublished - 2019 Dec 15

Fingerprint

Carbon Monoxide
Carbon monoxide
carbon monoxide
membranes
solid state
Membranes
matrices
Comb and Wattles
Methacrylates
Nanosheets
Ethylene Glycol
copolymers
Copolymers
Silver
Ether
Polyethylene glycols
glycols
Ethers
ethers
ethylene

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Park, Cheol Hun ; Lee, Jae Hun ; Kim, Na Un ; Kong, Chang In ; Kim, Jeong Hoon ; Kim, Jong Hak. / Solid-state facilitated transport of carbon monoxide through mixed matrix membranes. In: Journal of Membrane Science. 2019 ; Vol. 592.
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Solid-state facilitated transport of carbon monoxide through mixed matrix membranes. / Park, Cheol Hun; Lee, Jae Hun; Kim, Na Un; Kong, Chang In; Kim, Jeong Hoon; Kim, Jong Hak.

In: Journal of Membrane Science, Vol. 592, 117373, 15.12.2019.

Research output: Contribution to journalArticle

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AU - Kim, Na Un

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