Mixed-gas separation properties of phosphazene polymer membranes

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399308019498· OSTI ID:145143

Peterson, E S; Stone, M L; McCaffrey, R R; Cummings, D G ^[1]

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1. Idaho National Engineering Lab., Idaho Falls (United States)

The mixed-gas separation properties of poly[bis(phenoxy)phosphazene] based polymers are reported. Transport behavior was determined using the variable volume technique. Test gases were run as mixed-gas pairs including SO{sub 2}/N{sub 2}, H{sub 2}S/CH{sub 4}, and CO{sub 2}/CH{sub 4}. Transport of these gases was found to be a sorption controlled process since these gases significantly deviated from the diffusion controlled permeability-size correlation. Membranes were prepared using solution casting techniques. Solvent evaporation rate during the casting and subsequent curing processes was controlled to provide a consistent membrane microstructure. The authors have observed that polyphosphazene membranes can effectively be used to separate acid gases from various waste streams in harsh, chemically aggressive environments.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 145143
• Report Number(s): CONF-911049--
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 1-3 Vol. 28; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
CARBON DIOXIDE
HYDROGEN SULFIDES
MEMBRANES
METHANE
NITROGEN
ORGANIC POLYMERS
SORPTION
SORPTIVE PROPERTIES
SULFUR DIOXIDE
WASTE PROCESSING