Features of the behavior of nanosized catalytic dispersions in Fischer-Tropsch synthesis in slurry reactors of the CSTR and SBCR types

• Published in: Journal of the Taiwan Institute of Chemical Engineers 2025-02, Vol.167, p.105847, Article 105847
• Main Authors: Kuzmin, A.E., Dementieva, O.S., Kulikova, M.V., Morozova, Ya.V., Svidersky, S.A., Maksimov, A.L.
• Format: Article
• Language: English
• Subjects: Fischer–Tropsch synthesis; Iron-containing catalyst; Nanocatalytic dispersion; Nanoparticles; Slurry reactor
• ISSN: 1876-1070
• DOI: 10.1016/j.jtice.2024.105847

•Catalytic behavior of nanoscale dispersion in SBCR and CSTR has been studied.•Conversion values for dispersion were close in contrast to microsized slurry data.•Kinetic assessment for both reactors gives observed activation energies of 35–65 kJ.•Reaction occurs in transition area of external diffusion for both SBCR and CSTR. This study investigates the behavior of nanosized iron-containing dispersions during Fischer–Tropsch synthesis (FTS) in three-phase reactors of different types: CSTR and SBCR. The catalytic activity of nanosized dispersions was studied in three-phase reactors of different types: CSTR and SBCR. Calculations of the parameters of kinetic models for different reactors were carried out using Excel 2013 spreadsheets, the physical properties of gas mixtures and liquid hydrocarbon media were carried out using built-in models of ASPEN HYSYS v 10. For the first time, the influence of the type of slurry reactor on the catalytic behavior of a nanosized particles during FTS was systematically studied. It has been established that at various temperatures, pressure and GHSV in the presence of a nanosized Fe catalysts, XCO for SBCR in most cases is close to XCO for CSTR, which is not consistent with the literature data for these reactors with micro-sized slurry catalysts. The results of kinetic estimates indicate the presence of inhibition in the liquid/nanoparticle edge, which is hypothetically related to the dynamics of molecules of long-chain alkanes of the dispersion on this edge and may depend on the nature of the mechanical action on such a medium. [Display omitted]