Accumulation of liquid hydrocarbons during cobalt-catalyzed Fischer–Tropsch synthesis - influence of activity and chain growth probability

2019 ◽  
Vol 9 (15) ◽  
pp. 4047-4054 ◽  
Author(s):  
Stefan Rößler ◽  
Christoph Kern ◽  
Andreas Jess
Keyword(s):  
Tropsch Synthesis ◽  
Chain Growth ◽  
Liquid Hydrocarbons ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Chain Growth Probability ◽  
One Year ◽  
Growth Probability

It may take over one year in order to fill FT catalyst pores, depending on activity and chain growth probability.

A DFT study of the chain growth probability in Fischer–Tropsch synthesis

2008 ◽  
Vol 257 (1) ◽  
pp. 221-228 ◽  
Author(s):  
J CHENG ◽  
P HU ◽  
P ELLIS ◽  
S FRENCH ◽  
G KELLY ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Dft Study ◽  
Chain Growth ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Chain Growth Probability ◽  
Growth Probability

Chain growth mechanism of Fischer–Tropsch synthesis on Fe5C2(001)

2011 ◽  
Vol 346 (1-2) ◽  
pp. 55-69 ◽  
Author(s):  
Dong-Bo Cao ◽  
Yong-Wang Li ◽  
Jianguo Wang ◽  
Haijun Jiao
Keyword(s):  
Growth Mechanism ◽  
Tropsch Synthesis ◽  
Chain Growth ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

Insight into CH4 formation and chain growth mechanism of Fischer−Tropsch synthesis on θ-Fe3C(0 3 1)

2017 ◽  
Vol 682 ◽  
pp. 115-121 ◽  
Author(s):  
Yifan Wang ◽  
Ying Li ◽  
Shouying Huang ◽  
Jian Wang ◽  
Hongyu Wang ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Tropsch Synthesis ◽  
Chain Growth ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Insight Into

Modelling Laboratory Fischer-Tropsch Synthesis Using Cobalt Catalysts

2018 ◽  
Vol 16 (11) ◽  
Author(s):  
Luis A. Díaz-Trujillo ◽  
Gilberto Toledo-Chávez ◽  
Gladys Jiménez-García ◽  
Héctor Hernández-Escoto ◽  
Rafael Maya-Yescas
Keyword(s):  
Equilibrium Constants ◽  
Fixed Bed ◽  
Reaction Rates ◽  
Tropsch Synthesis ◽  
Cobalt Catalysts ◽  
Chain Growth ◽  
Single Event ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Heterogeneous Kinetics

AbstractThe main goal of this paper is to critically review current microkinetics available for Fischer-Tropsch synthesis (FTS) modelling, in order to propose the best way to follow this set of complex reactions; therefore a microkinetic model was developed for FTS, accomplishing surface chemistry, heterogeneous kinetics, and single-event previous development for Co-based catalysts. Model starts simulating CO activation on catalyst surface, and then formation of methane, ethane and subsequent chain growth. Reaction rates were derived following the formalism of Langmuir-Hinshelwood-Hougen-Watson (LHHW); surface steps were proposed in consequence of feasibility. Chain growth was modelled by single-event steps, taking into account geometrical conformation explicitly. Number of growth steps of 1-olefins was rectified as requiring one more active site than mechanisms proposed previously; it was found that formation of these olefins exhibits a fast drop in chain growth; this phenomenon is explained in terms of probable geometrical conformations that lead to the number of single events. Experimental results in literature about isothermal synthesis of hydrocarbons in the gasoline range were simulated in a fixed-bed laboratory reactor; thermodynamic consistency was derived from chemical equilibrium over all reactions occurring during FTS. Equilibrium constants were evaluated as function of Gibbs free energy, and partial pressures of reactants and products.

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