Extension of the Single-Event Methodology to Metal Catalysis: Application to Fischer-Tropsch Synthesis

G. Lozano-Blanco (1) , K. Surla (2) , J.W. Thybaut (1) , G.B. Marin (1)

1 UGENT - Universiteit Gent = Ghent University
2 IFPEN - IFP Energies nouvelles

The single-event methodology has been extended to metal catalysis using Fischer-Tropsch synthesis on an iron-based catalyst as case study. The reaction mechanism has been assessed in terms of elementary steps that could be categorized in reaction families such as reductive elimination, β-hydride elimination and methylene insertion. A computer code has been developed for the generation of the reaction network containing these elementary steps. The representation of reacting and intermediate species explicitly takes into account metal-carbon bonds as well as the presence of oxygen. The model has been validated using iron-based catalytic data at 623 K, 0.6 to 2.1 MPa, inlet molar H2/CO ratio between 2 and 6. 14 parameters, among which 10 activation energies and 4 atomic chemisorption enthalpies have been adjusted to the experimental data. Experimentally observed trends in alkane and 1-alkene product yields with the carbon number were adequately reproduced as well as the individual molar yields of the non-hydrocarbon products.

Domaines: Physique [physics]

G. Lozano-Blanco, K. Surla, J.W. Thybaut, G.B. Marin. Extension of the Single-Event Methodology to Metal Catalysis: Application to Fischer-Tropsch Synthesis. Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, 2011, 66 (3), pp.423-435. ⟨10.2516/ogst/2009075⟩. ⟨hal-01937395⟩