New perfluoro-dioxolane-based membranes for gas separations

Yoshiyuki Okamoto; Hao Zhang; Frantisek Mikes; Yasuhiro Koike; Zhenjie He; Timothy C. Merkel

doi:10.1016/j.memsci.2014.07.074

New perfluoro-dioxolane-based membranes for gas separations

Yoshiyuki Okamoto, Hao Zhang, Frantisek Mikes, Yasuhiro Koike, Zhenjie He, Timothy C. Merkel

University

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

45 Citations (Scopus)

Abstract

Perfluoropolymer membranes have found commercial use because of their unique gas separation properties and chemical resistance. To date, studies of gas transport in perfluoropolymers have been limited largely to variants of the commercially available polymers, Teflon^® AF, Cytop, and Hyflon^® AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) and perfluoro(2-methylene-1,3-dioxolane). These new perfluoro copolymer membranes have superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H₂/CH₄, He/CH₄, N₂/CH₄, and CO₂/CH₄. For example, membranes based on 57mol% perfluoro(2-methylene-1,3-dioxolane) show H₂/CH₄ selectivity of 130 combined with a H₂ permeance of 700gpu. These values far exceed an upper bound for commercial perfluoropolymers. The transport properties of the new perfluoro membranes depend strongly on the copolymer composition with increasing amounts of the efficient packing monomer perfluoro(2-methylene-1,3-dioxolane), yielding membranes with higher size selectivity and lower permeance.

Original language	English
Pages (from-to)	412-419
Number of pages	8
Journal	Journal of Membrane Science
Volume	471
DOIs	https://doi.org/10.1016/j.memsci.2014.07.074
Publication status	Published - 2014 Dec 1

Keywords

Gas permeance
Membranes
Perfluoropolymers
Selectivity
Trade-off plot

ASJC Scopus subject areas

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

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10.1016/j.memsci.2014.07.074

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title = "New perfluoro-dioxolane-based membranes for gas separations",

abstract = "Perfluoropolymer membranes have found commercial use because of their unique gas separation properties and chemical resistance. To date, studies of gas transport in perfluoropolymers have been limited largely to variants of the commercially available polymers, Teflon{\textregistered} AF, Cytop, and Hyflon{\textregistered} AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) and perfluoro(2-methylene-1,3-dioxolane). These new perfluoro copolymer membranes have superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, N2/CH4, and CO2/CH4. For example, membranes based on 57mol% perfluoro(2-methylene-1,3-dioxolane) show H2/CH4 selectivity of 130 combined with a H2 permeance of 700gpu. These values far exceed an upper bound for commercial perfluoropolymers. The transport properties of the new perfluoro membranes depend strongly on the copolymer composition with increasing amounts of the efficient packing monomer perfluoro(2-methylene-1,3-dioxolane), yielding membranes with higher size selectivity and lower permeance.",

keywords = "Gas permeance, Membranes, Perfluoropolymers, Selectivity, Trade-off plot",

author = "Yoshiyuki Okamoto and Hao Zhang and Frantisek Mikes and Yasuhiro Koike and Zhenjie He and Merkel, {Timothy C.}",

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AU - Okamoto, Yoshiyuki

AU - Zhang, Hao

AU - Mikes, Frantisek

AU - Koike, Yasuhiro

AU - He, Zhenjie

AU - Merkel, Timothy C.

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Perfluoropolymer membranes have found commercial use because of their unique gas separation properties and chemical resistance. To date, studies of gas transport in perfluoropolymers have been limited largely to variants of the commercially available polymers, Teflon® AF, Cytop, and Hyflon® AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) and perfluoro(2-methylene-1,3-dioxolane). These new perfluoro copolymer membranes have superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, N2/CH4, and CO2/CH4. For example, membranes based on 57mol% perfluoro(2-methylene-1,3-dioxolane) show H2/CH4 selectivity of 130 combined with a H2 permeance of 700gpu. These values far exceed an upper bound for commercial perfluoropolymers. The transport properties of the new perfluoro membranes depend strongly on the copolymer composition with increasing amounts of the efficient packing monomer perfluoro(2-methylene-1,3-dioxolane), yielding membranes with higher size selectivity and lower permeance.

AB - Perfluoropolymer membranes have found commercial use because of their unique gas separation properties and chemical resistance. To date, studies of gas transport in perfluoropolymers have been limited largely to variants of the commercially available polymers, Teflon® AF, Cytop, and Hyflon® AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) and perfluoro(2-methylene-1,3-dioxolane). These new perfluoro copolymer membranes have superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H2/CH4, He/CH4, N2/CH4, and CO2/CH4. For example, membranes based on 57mol% perfluoro(2-methylene-1,3-dioxolane) show H2/CH4 selectivity of 130 combined with a H2 permeance of 700gpu. These values far exceed an upper bound for commercial perfluoropolymers. The transport properties of the new perfluoro membranes depend strongly on the copolymer composition with increasing amounts of the efficient packing monomer perfluoro(2-methylene-1,3-dioxolane), yielding membranes with higher size selectivity and lower permeance.

KW - Gas permeance

KW - Membranes

KW - Perfluoropolymers

KW - Selectivity

KW - Trade-off plot

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New perfluoro-dioxolane-based membranes for gas separations

Abstract

Keywords

ASJC Scopus subject areas

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