Role of surface carboxylate deposition on the deactivation of cobalt on titania Fischer-Tropsch catalysts

Journal article (2021)

Authors

P. Gonugunta Engineering Thermodynamics - Mechanical, Maritime and Materials Engineering , RST/Fundamental Aspects of Materials and Energy - AS
A. Iulian Dugulan RID/TS/Instrumenten groep
A.I. Dugulan RID/TS/Instrumenten groep
G. Leendert Bezemer Shell Global Solutions International B.V.
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2021 P. Gonugunta, A.I. Dugulan, G. Leendert Bezemer, E.H. Brück
DOI: https://doi.org/10.1016/j.cattod.2020.04.037
More Info
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Published Date

2021

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

Operando spectroscopic techniques (Diffusive Reflective Infrared Fourier-Transform and Mössbauer emission spectroscopy) were combined to investigate the role of oxygenates deposition on deactivation of cobalt on titania Fischer-Tropsch catalysts at high pressure. Clear formation of carboxylates was seen for catalysts prepared via both impregnation and precipitation, but more and heavier carboxylates were seen on the impregnated catalyst. This effect is related to a higher olefin content in the products obtained with the impregnated sample, resulting to increased formation of oxygenates through the hydroformylation side reaction. The combined gas chromatography/infrared spectroscopy data demonstrated that the surface carboxylate species are not involved in the catalyst deactivation, being most likely spectator species on the titania support.