Jump to main content
Jump to site search

Issue 8, 2019
Previous Article Next Article

Sorption and condensation of higher hydrocarbons in a Fischer–Tropsch catalyst

Author affiliations

Abstract

Liquid higher hydrocarbons accumulate inside of heterogeneous catalyst pores, resulting in negative influences on reaction rates as well as product distribution, especially for industrial mm-particles. Besides the kinetics of the rate of HC formation, the second parameter determining the pore filling is the effective vapor pressure of each HC with C-number i relative to the saturation value, i.e. Φ = pvap,i,eff/psat,i. Ad- and desorption experiments (Co/Al2O3 FT catalyst, paraffins with C-numbers from 4 to 28) were conducted using a magnetic suspension balance (MSB), and reveal that the sorption equilibrium is determined by multi-layer sorption combined with strong capillary condensation. The experimental sorption data, presented here for the first time for long chain HCs under FT conditions, were also modelled successfully to predict Φ-values in a porous FT catalyst depending on the C-number and pore filling degree. The simulation of the filling process based on the kinetics of the FTS and the new sorption model is in agreement with the experimental data of the process also measured using a MSB.

Graphical abstract: Sorption and condensation of higher hydrocarbons in a Fischer–Tropsch catalyst

Back to tab navigation

Publication details

The article was received on 19 Dec 2018, accepted on 12 Mar 2019 and first published on 13 Mar 2019


Article type: Paper
DOI: 10.1039/C8CY02551G
Catal. Sci. Technol., 2019,9, 1902-1910

  •   Request permissions

    Sorption and condensation of higher hydrocarbons in a Fischer–Tropsch catalyst

    S. Rößler, C. Kern and A. Jess, Catal. Sci. Technol., 2019, 9, 1902
    DOI: 10.1039/C8CY02551G

Search articles by author

Spotlight

Advertisements