Mixed matrix membranes based on dual-functional MgO nanosheets for olefin/paraffin separation

Cheol Hun Park, Jae Hun Lee, Jung Pyo Jung, Jong Hak Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Mixed matrix membranes (MMMs) comprising MgO nanosheets (MgO-NSs) and AgBF4 in a comb copolymer matrix were prepared for olefin/paraffin separation. The MgO-NSs with multi-mesopores and a large surface area were synthesized via a facile, non-hydrothermal method using MgCl2 as the precursor. Two kinds of comb copolymers, poly(oxyethylene methacrylate)-g-poly(ethylene glycol) behenyl ether methacrylate (POEM-g-PEGBEM) and poly(2-hydroxypropyl 2-(methacryloyloxy)ethyl phthalate)-g-poly(ethylene glycol) behenyl ether methacrylate (PHMEP-g-PEGBEM), were synthesized via low-cost, free-radical polymerization. The neat copolymer membranes showed poor separation efficiency (selectivity of 1.0), which was improved upon incorporation of AgBF4 via facilitated olefin transport. Addition of MgO-NS further enhanced the separation performance due to the dual-functionality, i.e., the enhanced activity of the silver carrier derived from its specific interaction with silver and increased diffusivity due to the mesoporous structure. The gas separation efficacy of the PHMEP-g-PEGBEM-based membranes was superior to that of the POEM-g-PEGBEM-based membranes, indicating the effectiveness of the PHMEP chain having the phthalate group for olefin separation due to strong chelation. The MMM consisting of PHMEP-g-PEGBEM/AgBF4/MgO-NS exhibited the optimal performance, (permeance of 11.8 GPU and selectivity of 12.9) for separation of the propylene/propane mixture. The specific interaction and morphological properties of the MMMs were characterized by various spectroscopic techniques.

Original languageEnglish
Pages (from-to)48-56
Number of pages9
JournalJournal of Membrane Science
Volume533
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Methacrylates
Nanosheets
Alkenes
paraffins
Ethylene Glycol
Paraffin
Paraffins
alkenes
Olefins
phthalates
Ether
Polyethylene glycols
glycols
Ethers
ethers
membranes
Membranes
ethylene
matrices
Comb and Wattles

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Mixed matrix membranes based on dual-functional MgO nanosheets for olefin/paraffin separation",
abstract = "Mixed matrix membranes (MMMs) comprising MgO nanosheets (MgO-NSs) and AgBF4 in a comb copolymer matrix were prepared for olefin/paraffin separation. The MgO-NSs with multi-mesopores and a large surface area were synthesized via a facile, non-hydrothermal method using MgCl2 as the precursor. Two kinds of comb copolymers, poly(oxyethylene methacrylate)-g-poly(ethylene glycol) behenyl ether methacrylate (POEM-g-PEGBEM) and poly(2-hydroxypropyl 2-(methacryloyloxy)ethyl phthalate)-g-poly(ethylene glycol) behenyl ether methacrylate (PHMEP-g-PEGBEM), were synthesized via low-cost, free-radical polymerization. The neat copolymer membranes showed poor separation efficiency (selectivity of 1.0), which was improved upon incorporation of AgBF4 via facilitated olefin transport. Addition of MgO-NS further enhanced the separation performance due to the dual-functionality, i.e., the enhanced activity of the silver carrier derived from its specific interaction with silver and increased diffusivity due to the mesoporous structure. The gas separation efficacy of the PHMEP-g-PEGBEM-based membranes was superior to that of the POEM-g-PEGBEM-based membranes, indicating the effectiveness of the PHMEP chain having the phthalate group for olefin separation due to strong chelation. The MMM consisting of PHMEP-g-PEGBEM/AgBF4/MgO-NS exhibited the optimal performance, (permeance of 11.8 GPU and selectivity of 12.9) for separation of the propylene/propane mixture. The specific interaction and morphological properties of the MMMs were characterized by various spectroscopic techniques.",
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Mixed matrix membranes based on dual-functional MgO nanosheets for olefin/paraffin separation. / Park, Cheol Hun; Lee, Jae Hun; Jung, Jung Pyo; Kim, Jong Hak.

In: Journal of Membrane Science, Vol. 533, 01.01.2017, p. 48-56.

Research output: Contribution to journalArticle

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