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In this study the effect of catalyst nanoparticle size on the Fischer–Tropsch synthesis (FTS) activity is investigated on iron catalyst. A series of iron oxide particles doped by adding cupper and lanthanum were prepared as a catalyst via precipitation by microemulsion method. Because of the role of iron carbide in FTS reaction by iron catalysts, the iron carbide particle sizes was evaluated after...
The influence of cobalt crystallite size on catalyst performance in Fischer–Tropsch synthesis (FTS) has been investigated using functionalized carbon nanotube (CNT)-supported catalyst. The catalysts were synthesized by the core reverse micelle reactions with cobalt crystallites of various sizes. It has been shown that crystallite size is dependent to the water-to-surfactant ratio (3–10) used for the...
A series of ternary hydrotalcites in the nitrate form was prepared with a modified-urea method to obtain active Co-based catalysts for the Fischer–Tropsch synthesis. An optimization study concerning the amount of cobalt in the catalysts (range 5–35wt%.) and the reaction temperature (220–260°C) is reported. All the samples were characterized by several methods, including XRPD, ICP-OES, SEM, TEM, FT-IR,...
In this paper, a more efficient preparation method for Co catalyst supported on carbon nanotubes (Co/CNTs) was investigated by introducing plasma technique for precursor decomposition. The microstructure and the Fischer–Tropsch (FT) performance of the Co catalysts prepared by different preparation methods were also compared. It was found that Co/CNTs catalyst can be prepared by calcination at 200°C...
The aim of this work was to determine the surface properties of silica supported cobalt catalyst for Fischer–Tropsch synthesis. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used for this purpose as a main analytical tool. Moreover, X-ray diffraction (XRD), temperature programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis/differential thermal...
The present work describes the development of a two-dimensional mathematical model of a pilot-scale fixed-bed reactor for Fe-based Fischer–Tropsch synthesis to evaluate the effect of tube diameter on temperature profile and catalyst performance. The entire chain lengths of the hydrocarbon products were lumped to form several representative components, and the apparent kinetic parameters for the reaction...
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