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Thermal stability of nafion membranes under mechanical stress

Abstract

The feasibility of adequately modified fluoro-ionomer membranes (NAFION{sup R}) is demonstrated for the selective separation of methanol synthesis products from the raw reactor gas at temperatures around 200{sup o}C. For an economically relevant application of this concept on a technical scale the Nafion membranes should be thin ({approx_equal}10 {mu}m) and thermally stable over a long period of time (1-2 years). In cooperation with industry (Methanol Casale SA, Lugano (CH)), we test the thermal stability of Nafion hollow fibers and supported Nafion thin sheet membranes at temperatures between 160 and 200{sup o}C under mechanical stress by applying a gas pressure difference over the membrane surface ({Delta}P{<=} 40 bar). Tests with the hollow fibers revealed that Nafion has visco-elastic properties. Tests with 50 {mu}m thin Nafion sheets supported by a porous metal carrier at 200{sup o}C and {Delta}P=39 bar showed no mechanical defects over a period of 92 days. (author) 5 figs., 4 refs.
Authors:
Quintilii, M; Struis, R [1] 
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Publication Date:
Jun 01, 1997
Product Type:
Miscellaneous
Report Number:
ETDE/CH-mf-97750556
Reference Number:
SCA: 100200; PA: CH-97:0E0196; EDB-97:090614; SN: 97001800467
Resource Relation:
Other Information: PBD: 1997; Related Information: Is Part Of Paul Scherrer Institut annual report 1996. Annex V: PSI general energy technology newsletter 1996; Daum, C.; Leuenberger, J. [eds.]; PB: 125 p.
Subject:
10 SYNTHETIC FUELS; METHANOL; SEPARATION PROCESSES; MEMBRANES; ORGANIC POLYMERS; PERFORMANCE; STABILITY; NITROGEN; EXPERIMENTAL DATA
OSTI ID:
492028
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Other: ON: DE97750556; TRN: CH97E0196
Availability:
OSTI as DE97750556
Submitting Site:
CH
Size:
pp. 20-21
Announcement Date:

Citation Formats

Quintilii, M, and Struis, R. Thermal stability of nafion membranes under mechanical stress. Switzerland: N. p., 1997. Web.
Quintilii, M, & Struis, R. Thermal stability of nafion membranes under mechanical stress. Switzerland.
Quintilii, M, and Struis, R. 1997. "Thermal stability of nafion membranes under mechanical stress." Switzerland.
@misc{etde_492028,
title = {Thermal stability of nafion membranes under mechanical stress}
author = {Quintilii, M, and Struis, R}
abstractNote = {The feasibility of adequately modified fluoro-ionomer membranes (NAFION{sup R}) is demonstrated for the selective separation of methanol synthesis products from the raw reactor gas at temperatures around 200{sup o}C. For an economically relevant application of this concept on a technical scale the Nafion membranes should be thin ({approx_equal}10 {mu}m) and thermally stable over a long period of time (1-2 years). In cooperation with industry (Methanol Casale SA, Lugano (CH)), we test the thermal stability of Nafion hollow fibers and supported Nafion thin sheet membranes at temperatures between 160 and 200{sup o}C under mechanical stress by applying a gas pressure difference over the membrane surface ({Delta}P{<=} 40 bar). Tests with the hollow fibers revealed that Nafion has visco-elastic properties. Tests with 50 {mu}m thin Nafion sheets supported by a porous metal carrier at 200{sup o}C and {Delta}P=39 bar showed no mechanical defects over a period of 92 days. (author) 5 figs., 4 refs.}
place = {Switzerland}
year = {1997}
month = {Jun}
}