Novel composite membranes comprising silver salts physically dispersed in poly(ethylene-co-propylene) for the separation of propylene/propane

Jong Hak Kim, Byoung Ryul Min, Yong Woo Kim, Sang Wook Kang, Jongok Won, Yong Soo Kang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Novel composite membranes, which delivered high separation performance for propylene/propane mixtures, were developed by coating inert poly(ethylene-co- propylene) rubber (EPR) onto a porous polyester substrate, followed by the physical distribution of AgBF4. Scanning electron microscopy-wavelength dispersive spectrometer (SEM-WDS) revealed that silver salts were uniformly distributed in the EPR layer. The physical dispersion of the silver salts in the inert polymer matrix, without specific interaction, was characterized by FT-IR and FT-Raman spectroscopy. The high separation performance was presumed to stem from the in-situ dissolution of crystalline silver ionic aggregates into free silver ions, which acted as an active propylene carrier within a propylene environment, leading to facilitated propylene transport through the membranes. The membranes were functional at all silver loading levels, exhibiting an unusually low threshold carrier concentration (less than 0.06 of silver weight fraction). The separation properties of these membranes, i.e. the mixed gas selectivity of propylene/propane ∼55 and mixed gas permeance ∼7 GPU, were stable for several days.

Original languageEnglish
Pages (from-to)343-347
Number of pages5
JournalMacromolecular Research
Volume15
Issue number4
DOIs
Publication statusPublished - 2007 Jan 1

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Propane
Composite membranes
Silver
Propylene
Ethylene
Salts
Rubber
Membranes
Gases
Polyesters
ethylene
propylene
Polymer matrix
Carrier concentration
Raman spectroscopy
Spectrometers
Dissolution
Ions
Crystalline materials
Coatings

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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abstract = "Novel composite membranes, which delivered high separation performance for propylene/propane mixtures, were developed by coating inert poly(ethylene-co- propylene) rubber (EPR) onto a porous polyester substrate, followed by the physical distribution of AgBF4. Scanning electron microscopy-wavelength dispersive spectrometer (SEM-WDS) revealed that silver salts were uniformly distributed in the EPR layer. The physical dispersion of the silver salts in the inert polymer matrix, without specific interaction, was characterized by FT-IR and FT-Raman spectroscopy. The high separation performance was presumed to stem from the in-situ dissolution of crystalline silver ionic aggregates into free silver ions, which acted as an active propylene carrier within a propylene environment, leading to facilitated propylene transport through the membranes. The membranes were functional at all silver loading levels, exhibiting an unusually low threshold carrier concentration (less than 0.06 of silver weight fraction). The separation properties of these membranes, i.e. the mixed gas selectivity of propylene/propane ∼55 and mixed gas permeance ∼7 GPU, were stable for several days.",
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Novel composite membranes comprising silver salts physically dispersed in poly(ethylene-co-propylene) for the separation of propylene/propane. / Kim, Jong Hak; Min, Byoung Ryul; Kim, Yong Woo; Kang, Sang Wook; Won, Jongok; Kang, Yong Soo.

In: Macromolecular Research, Vol. 15, No. 4, 01.01.2007, p. 343-347.

Research output: Contribution to journalArticle

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