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

Abstract

Background

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.

Methods

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.

Significant findings

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, X_CO for SBCR in most cases is close to X_CO 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.