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Titolo:
Mixed-gas permeation of syngas components in poly(dimethylsiloxane) and poly(1-trimethylsilyl-1-propyne) at elevated temperatures
Autore:
Merkel, TC; Gupta, RP; Turk, BS; Freeman, BD;
Indirizzi:
N Carolina State Univ, Dept Chem Engn, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 em Engn, Raleigh, NC 27695 USA Res Triangle Inst, Ctr Engn & Env Technol, Res Triangle Pk, NC 27709 USA Res Triangle Inst Res Triangle Pk NC USA 27709 Triangle Pk, NC 27709 USA
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 1-2, volume: 191, anno: 2001,
pagine: 85 - 94
SICI:
0376-7388(20010930)191:1-2<85:MPOSCI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SILICONE POLYMERS; MEMBRANES; PERMEABILITY; POLY<1-(TRIMETHYLSILYL)-1-PROPYNE>; SEPARATION; SORPTION; 1-TRIMETHYLSILYL-1-PROPYNE; SOLUBILITY; CATALYSTS; DIFFUSION;
Keywords:
poly(dimethylsiloxane); poly(1-trimethylsilyl-1-propyne); permeability; activation energy of permeation; syngas; hydrogen sulfide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Freeman, BD N Carolina State Univ, Dept Chem Engn, Campus Box 7905, Raleigh, NC 27695 USA N Carolina State Univ Campus Box 7905 Raleigh NC USA 27695 USA
Citazione:
T.C. Merkel et al., "Mixed-gas permeation of syngas components in poly(dimethylsiloxane) and poly(1-trimethylsilyl-1-propyne) at elevated temperatures", J MEMBR SCI, 191(1-2), 2001, pp. 85-94

Abstract

The permeability of poly(dimethylsiloxane) (PDMS) and poly(1-trimethylsilyl-1-propyne) (PTMSP) to a simulated syngas feed containing H-2, CO, CO2, and H2S was determined as a function of temperature up to 240 degreesC (464 degreesF). The permeation properties of rarely studied CO and H2S were foundto be consistent with their molecular properties (i.e. critical temperature) in both rubbery PDMS and high free volume, glassy PTMSP At room temperature, PDMS and PTMSP are more permeable to the more condensable gases CO2 and H2S than to H-2. However, both polymers become hydrogen selective at elevated temperatures. Activation energies of permeation are highest for H-2 inboth polymers and decrease regularly with increasing gas condensability. PTMSP exhibits evidence of accelerated physical aging at high temperature. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 01:06:10