Cristin-resultat-ID: 1898160
Sist endret: 15. mars 2021, 15:18
Resultat
Vitenskapelig artikkel
2010

Adsorption of Pure Vapor Species on Microporous Silica Membranes and Silica Pellets

Bidragsytere:
  • Ben Bettens
  • Adrian Verhoef
  • Henk van Veen
  • Jan Degrève
  • Bart Van der Bruggen og
  • Carlo Vandecasteele

Tidsskrift

Journal of Physical Chemistry C
ISSN 1932-7447
e-ISSN 1932-7455
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2010
Publisert online: 2010
Trykket: 2010
Volum: 114
Hefte: 20
Sider: 9416 - 9423

Klassifisering

Vitenskapsdisipliner

Kjemisk teknologi

Beskrivelse Beskrivelse

Tittel

Adsorption of Pure Vapor Species on Microporous Silica Membranes and Silica Pellets

Sammendrag

The adsorption and diffusion of pure water, methanol, ethanol, isopropanol, and butanol in microporous silica membranes and (methylated) silica top layer pellets are studied by performing vapor adsorption experiments at 40 °C using a gas chromatograph equipped with a headspace system and using a conventional gravimetrical microbalance, respectively. For silica pellets, the pure vapor adsorption equilibrium is adequately described by a Langmuir isotherm. Adsorption kinetics is described by the internal diffusion model, where surface diffusivities are estimated to be on the order of 10−13 m2/s. The surface diffusivity of water (DS = (5.5−6.2) × 10−13 m2/s) is a factor of 2 higher than the alcohol diffusivities (DS ≈ 3 × 10−13 m2/s). The methylated silica pellets display a higher alcohol adsorption and lower water adsorption. For the microporous silica membranes, methanol adsorption is reduced by a factor of 1000. This may reflect the different structure of the membrane compared to the pellets or the incomplete methanol vapor penetration into the membrane.

Bidragsytere

Ben Bettens

  • Tilknyttet:
    Forfatter
    ved KU Leuven

Bertha Adriana Verhoef

Bidragsyterens navn vises på dette resultatet som Adrian Verhoef
  • Tilknyttet:
    Forfatter
    ved KU Leuven

Henk van Veen

  • Tilknyttet:
    Forfatter
    ved Energieonderzoek Centrum Nederland

Jan Degrève

  • Tilknyttet:
    Forfatter
    ved KU Leuven

Bart Van der Bruggen

  • Tilknyttet:
    Forfatter
    ved KU Leuven
1 - 5 av 6 | Neste | Siste »