Transport properties of PA12-PTMO/AgBF4 solid polymer electrolyte membranes for olefin/paraffin separation

Atsushi Morisato; Zhenjie He; Ingo Pinnau; Tim C. Merkel

doi:10.1016/S0011-9164(02)00434-4

Transport properties of PA12-PTMO/AgBF₄ solid polymer electrolyte membranes for olefin/paraffin separation

Atsushi Morisato^*, Zhenjie He, Ingo Pinnau, Tim C. Merkel

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

A rubbery nylon-12/tetramethylene oxide block copolymer (PA12-PTMO) was used as a polymeric matrix material for silver tetrafluoroborate (AgBF₄) based solid polymer electrolyte membranes. Ethane sorption uptake of PA12-PTMO/AgBF₄ increased linearly with increasing feed pressure. Moreover, the ethane sorption capacity decreased by increasing the AgBF₄ concentration in the polymer electrolyte. Ethylene sorption of pure PA12-PTMO also followed Henry's law. On the other hand, the ethylene sorption isotherms of PA12-PTMO/AgBF₄ showed a completely different behavior. As the silver concentration increased in the polymer electrolyte membranes, the sorption isotherms showed a dual-mode sorption behavior. The initial sorption enhancement provides clear evidence of complex formation between ethylene and silver ions. Mixed-gas permeation studies performed with dry ethylene/ethane mixture demonstrated that PA12-PTMO/AgBF₄ composite membranes exhibited good stability. In a 14-day test period, the ethylene/ethane selectivity of this membrane decreased from 25-20. This performance is far better than that of any polymeric membrane for ethylene/ethane separation. The decline in membrane performance occurred only during the first 3 days of operation; thereafter, the membrane showed excellent long-term stability.

Original language	English (US)
Pages (from-to)	347-351
Number of pages	5
Journal	Desalination
Volume	145
Issue number	1-3
DOIs	https://doi.org/10.1016/S0011-9164(02)00434-4
State	Published - Sep 10 2002
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation under contract number DMI-9961414.

Keywords

AgBF
Facilitated transport
Olefin/paraffin separation
Solid polymer electrolyte

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science
Water Science and Technology
Mechanical Engineering

Access to Document

10.1016/S0011-9164(02)00434-4

Cite this

@article{f24d77b0f63d4ec2b1680eedf9a563bf,

title = "Transport properties of PA12-PTMO/AgBF4 solid polymer electrolyte membranes for olefin/paraffin separation",

abstract = "A rubbery nylon-12/tetramethylene oxide block copolymer (PA12-PTMO) was used as a polymeric matrix material for silver tetrafluoroborate (AgBF4) based solid polymer electrolyte membranes. Ethane sorption uptake of PA12-PTMO/AgBF4 increased linearly with increasing feed pressure. Moreover, the ethane sorption capacity decreased by increasing the AgBF4 concentration in the polymer electrolyte. Ethylene sorption of pure PA12-PTMO also followed Henry's law. On the other hand, the ethylene sorption isotherms of PA12-PTMO/AgBF4 showed a completely different behavior. As the silver concentration increased in the polymer electrolyte membranes, the sorption isotherms showed a dual-mode sorption behavior. The initial sorption enhancement provides clear evidence of complex formation between ethylene and silver ions. Mixed-gas permeation studies performed with dry ethylene/ethane mixture demonstrated that PA12-PTMO/AgBF4 composite membranes exhibited good stability. In a 14-day test period, the ethylene/ethane selectivity of this membrane decreased from 25-20. This performance is far better than that of any polymeric membrane for ethylene/ethane separation. The decline in membrane performance occurred only during the first 3 days of operation; thereafter, the membrane showed excellent long-term stability.",

keywords = "AgBF, Facilitated transport, Olefin/paraffin separation, Solid polymer electrolyte",

author = "Atsushi Morisato and Zhenjie He and Ingo Pinnau and Merkel, {Tim C.}",

note = "Funding Information: This work was supported by the National Science Foundation under contract number DMI-9961414.",

year = "2002",

month = sep,

day = "10",

doi = "10.1016/S0011-9164(02)00434-4",

language = "English (US)",

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T1 - Transport properties of PA12-PTMO/AgBF4 solid polymer electrolyte membranes for olefin/paraffin separation

AU - Morisato, Atsushi

AU - He, Zhenjie

AU - Pinnau, Ingo

AU - Merkel, Tim C.

N1 - Funding Information: This work was supported by the National Science Foundation under contract number DMI-9961414.

PY - 2002/9/10

Y1 - 2002/9/10

N2 - A rubbery nylon-12/tetramethylene oxide block copolymer (PA12-PTMO) was used as a polymeric matrix material for silver tetrafluoroborate (AgBF4) based solid polymer electrolyte membranes. Ethane sorption uptake of PA12-PTMO/AgBF4 increased linearly with increasing feed pressure. Moreover, the ethane sorption capacity decreased by increasing the AgBF4 concentration in the polymer electrolyte. Ethylene sorption of pure PA12-PTMO also followed Henry's law. On the other hand, the ethylene sorption isotherms of PA12-PTMO/AgBF4 showed a completely different behavior. As the silver concentration increased in the polymer electrolyte membranes, the sorption isotherms showed a dual-mode sorption behavior. The initial sorption enhancement provides clear evidence of complex formation between ethylene and silver ions. Mixed-gas permeation studies performed with dry ethylene/ethane mixture demonstrated that PA12-PTMO/AgBF4 composite membranes exhibited good stability. In a 14-day test period, the ethylene/ethane selectivity of this membrane decreased from 25-20. This performance is far better than that of any polymeric membrane for ethylene/ethane separation. The decline in membrane performance occurred only during the first 3 days of operation; thereafter, the membrane showed excellent long-term stability.

AB - A rubbery nylon-12/tetramethylene oxide block copolymer (PA12-PTMO) was used as a polymeric matrix material for silver tetrafluoroborate (AgBF4) based solid polymer electrolyte membranes. Ethane sorption uptake of PA12-PTMO/AgBF4 increased linearly with increasing feed pressure. Moreover, the ethane sorption capacity decreased by increasing the AgBF4 concentration in the polymer electrolyte. Ethylene sorption of pure PA12-PTMO also followed Henry's law. On the other hand, the ethylene sorption isotherms of PA12-PTMO/AgBF4 showed a completely different behavior. As the silver concentration increased in the polymer electrolyte membranes, the sorption isotherms showed a dual-mode sorption behavior. The initial sorption enhancement provides clear evidence of complex formation between ethylene and silver ions. Mixed-gas permeation studies performed with dry ethylene/ethane mixture demonstrated that PA12-PTMO/AgBF4 composite membranes exhibited good stability. In a 14-day test period, the ethylene/ethane selectivity of this membrane decreased from 25-20. This performance is far better than that of any polymeric membrane for ethylene/ethane separation. The decline in membrane performance occurred only during the first 3 days of operation; thereafter, the membrane showed excellent long-term stability.

KW - AgBF

KW - Facilitated transport

KW - Olefin/paraffin separation

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