A density functional theory study of the α-olefin selectivity in Fischer–Tropsch synthesis

2008 ◽  
Vol 255 (1) ◽  
pp. 20-28 ◽  
Author(s):  
Jun Cheng ◽  
Tao Song ◽  
P. Hu ◽  
C. Martin Lok ◽  
Peter Ellis ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Tropsch Synthesis ◽  
Density Functional Theory Study ◽  
Fischer Tropsch ◽  
Functional Theory ◽  
Fischer Tropsch Synthesis ◽  
Olefin Selectivity

scholarly journals Theoretical Study of CO Adsorption and Activation on Orthorhombic Fe7C3(001) Surfaces for Fischer–Tropsch Synthesis Using Density Functional Theory Calculations

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 563
Author(s):  
Hee-Joon Chun ◽  
Yong Tae Kim
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Co Adsorption ◽  
Density Functional Theory Calculations ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Functional Theory ◽  
Fischer Tropsch Synthesis ◽  
Co Dissociation ◽  
Co Activation

Fischer–Tropsch synthesis (FTS), which converts CO and H2 into useful hydrocarbon products, has attracted considerable attention as an efficient method to replace crude oil resources. Fe-based catalysts are mainly used in industrial FTS, and Fe7C3 is a common carbide phase in the FTS reaction. However, the intrinsic catalytic properties of Fe7C3 are theoretically unknown. Therefore, as a first attempt to understand the FTS reaction on Fe7C3, direct CO* dissociation on orthorhombic Fe7C3(001) (o-Fe7C3(001)) surfaces was studied using density functional theory (DFT) calculations. The surface energies of 14 terminations of o-Fe7C3(001) were first compared, and the results showed that (001)0.20 was the most thermodynamically stable termination. Furthermore, to understand the effect of the surface C atom coverage on CO* activation, C–O bond dissociation was performed on the o-Fe7C3(001)0.85, (001)0.13, (001)0.20, (001)0.09, and (001)0.99 surfaces, where the surface C atom coverages were 0.00, 0.17, 0.33, 0.33, and 0.60, respectively. The results showed that the CO* activation linearly decreased as the surface C atom coverage increased. Therefore, it can be concluded that the thermodynamic and kinetic selectivity toward direct CO* dissociation increased when the o-Fe7C3(001) surface had more C* vacancies.

Potassium adsorption behavior on hcp cobalt as model systems for the Fischer–Tropsch synthesis: a density functional theory study

2017 ◽  
Vol 19 (19) ◽  
pp. 12246-12254 ◽  
Author(s):  
Qingjun Chen ◽  
Ingeborg-Helene Svenum ◽  
Yanying Qi ◽  
Ljubisa Gavrilovic ◽  
De Chen ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Model Systems ◽  
Adsorption Behavior ◽  
Density Functional Theory Study ◽  
Fischer Tropsch ◽  
Functional Theory ◽  
Fischer Tropsch Synthesis ◽  
And Diffusion

The potassium adsorption and diffusion on hcp cobalt particles has been investigated in detail using DFT calculations.

Insight into the structure and morphology of Run clusters on Co(111) and Co(311) surfaces

2018 ◽  
Vol 8 (10) ◽  
pp. 2728-2739 ◽  
Author(s):  
Lili Liu ◽  
Mengting Yu ◽  
Qiang Wang ◽  
Bo Hou ◽  
Yan Liu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Density Functional ◽  
Fischer Tropsch ◽  
Functional Theory ◽  
Fischer Tropsch Synthesis ◽  
Structure And Morphology ◽  
Growth Modes ◽  
Ru Promoter ◽  
Insight Into

The adsorption configurations, growth modes and morphology of a Ru promoter under the approximate conditions of cobalt catalyzed Fischer–Tropsch synthesis (FTS) were investigated by density functional theory (DFT) calculations.

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