Cristin-resultat-ID: 1373476
Sist endret: 16. februar 2017, 13:13
NVI-rapporteringsår: 2016
Resultat
Vitenskapelig artikkel
2016

A Single-Event MicroKinetic model for the cobalt catalyzed Fischer-Tropsch Synthesis

Bidragsytere:
  • Jonas Van Belleghem
  • Cristian Ledesma Rodriguez
  • Jia Yang
  • Kenneth Toch
  • De Chen
  • Joris W. Thybaut
  • mfl.

Tidsskrift

Applied Catalysis A : General
ISSN 0926-860X
e-ISSN 1873-3875
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2016
Volum: 524
Sider: 149 - 162

Importkilder

Scopus-ID: 2-s2.0-84977647557

Beskrivelse Beskrivelse

Tittel

A Single-Event MicroKinetic model for the cobalt catalyzed Fischer-Tropsch Synthesis

Sammendrag

The Single-Event MicroKinetic methodology has been successfully extended from Fe to Co catalyzed Fischer-Tropsch Synthesis. A total of 82 experiments were performed in a plug flow reactor with a H2 to CO molar inlet ratio between 3 and 10, a temperature range from 483 to 503 K, CO inlet partial pressures from 3.7 to 16.7 kPa and space time varying between 7.2 and 36.3 (kgcat s) mol−1. Via regression, statistically significant and physicochemically meaningful estimates were obtained for the activation energies in the model and the H, C and O atomic chemisorption enthalpies as required for the UBI-QEP method. A reaction path analysis allowed relating the observed deviations from the Anderson-Schulz-Flory distribution, i.e., a high methane and low ethene selectivity, to the symmetry numbers and a higher chemisorption enthalpy of the metal methyl species compared to the other metal alkyl species. Simulations at industrially relevant conditions show that, as a catalyst descriptor, the H atomic chemisorption enthalpy crucially determines both the CO conversion and the C5+ selectivity. The higher FTS activity of Co compared to Fe is explained via the higher oxygen atomic chemisorption enthalpy on the latter compared to the former.

Bidragsytere

Jonas Van Belleghem

  • Tilknyttet:
    Forfatter
    ved Universiteit Gent

Cristian Ledesma Rodriguez

  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet

Jia Yang

  • Tilknyttet:
    Forfatter
    ved Prosessteknologi ved SINTEF AS

Kenneth Toch

  • Tilknyttet:
    Forfatter
    ved Universiteit Gent

de Chen

Bidragsyterens navn vises på dette resultatet som De Chen
  • Tilknyttet:
    Forfatter
    ved Institutt for kjemisk prosessteknologi ved Norges teknisk-naturvitenskapelige universitet
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