Development of a kinetic model of the Fischer–Tropsch synthesis reaction with a cobalt-based catalyst

Abstract

A kinetic model of cobalt-based Fischer-Tropsch synthesis was developed through the detailed kinetic study of the reaction mechanism. Experimental evidence and previously reported theoretical analyses were used to suggest the mechanism and derive reaction rates for the formation of hydrocarbon products by applying the equilibrium constants of the adsorbents and the quasi steady state assumption to intermediate species on the surface of the catalyst. The comparison between experimental data and simulated results with kinetic parameters validated the effectiveness of the developed model. Further analysis showed that temperature and H 2 /CO ratio significantly influenced the entire distribution of hydrocarbon products. The effects of operating conditions were also predicted in accordance with previous work, thus demonstrating that the developed model can contribute to a better understanding of the kinetic mechanism of FT synthesis.

CO2‐neutrale Fischer‐Tropsch‐Kraftstoffe aus dezentralen modularen Anlagen: Status und Perspektiven

“…Der Katalysator hat ebenfalls einen signifikanten Einfluss auf die Produktzusammensetzung. Der Einfluss der Prozessparameter wurde bereits in zahlreichen Studien untersucht . In der FT‐Stufe eines PtL‐Prozesses sollen vor allem langkettige lineare KWs erzeugt werden.…”

Capturing and using CO2as feedstock with chemical looping and hydrothermal technologies

“…An iron-based catalyst and an operating temperature of 350°C will produce mostly gasoline, while a cobalt base and an operating temperature of 200°C will produce mostly diesel fuel. The syncrude is distilled to naphtha, distillate, and wax, which are processed through a series of refining and reforming steps with hydrotreatment and catalytic processes to produce gasoline and diesel at the required configuration [20,21,157,34]. Figure 9(a) shows a schematic gasification system with Fe-based oxides, namely, wüstite (FeO), hematite (Fe 2 O 3 ), and magnetite (Fe 3 O 4 ) [74,75].…”

Kinetic Study Based on the Carbide Mechanism of a Co-Pt/γ-Al2O3 Fischer–Tropsch Catalyst Tested in a Laboratory-Scale Tubular Reactor

“…proficiently applied the same methodology in describing a Co-Re/Al 2 O 3 catalyst tested in a stirred tank slurry reactor in the presence of a CO-insertion model [17] and a carbide mechanistic model [39], up to compounds of carbon number C 15 . Finally, to the best of our knowledge, only a few authors described the outcomes of their kinetic models at high carbon number values, among which Visconti et al [16,40], who provided a mechanistic kinetic model up to carbon number C 49 , and Kwack et al [41] up to carbon number C 40 .…”