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Quick-XAS and Raman operando characterisation of a cobalt alumina-supported catalyst under realistic Fischer–Tropsch reaction conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
54933 47032 2013 7 PDF Available
Title
Quick-XAS and Raman operando characterisation of a cobalt alumina-supported catalyst under realistic Fischer–Tropsch reaction conditions
Abstract

The work reported herein describes the structure and behaviour of alumina-supported nano-sized metallic cobalt particles under realistic activation and working Fischer–Tropsch (FT) synthesis conditions (Ptot = 20 bar). The combination of Quick-XAS for monitoring the change of the local order around Co with time resolved Raman spectroscopy for monitoring hydrocarbons produced by FT synthesis provides a better comprehension of the behaviour of FT catalysts in operation. This is of prime importance to improve cycle length, catalytic activity and selectivity towards heavy paraffins of FT cobalt-based catalysts. Under the activation process used in this work, we evidenced the formation of Co nanoparticles which undergo a reversible oxidation/reduction process depending on the water partial pressure in the cell controlled by the reaction temperature and CO conversion.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (261 K)Download as PowerPoint slideHighlights► The structural behaviour of cobalt Fischer–Tropsch catalysts was studied. ► Realistic activation and working synthesis conditions (Ptot = 20 bar) were used. ► This study combined Quick-XAS and time resolved Raman. ► Catalytic properties have been obtained by Raman. ► A reversible oxidation/reduction process linked to PH2OPH2O was established.

Keywords
Operando; Quick-XAS; Raman spectroscopy; Cobalt-supported catalyst
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Quick-XAS and Raman operando characterisation of a cobalt alumina-supported catalyst under realistic Fischer–Tropsch reaction conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 205, 30 April 2013, Pages 94–100
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us