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X-ray absorption spectroscopy and heterogeneous catalysis: Performances at the SOLEIL's SAMBA beamline

Paper ID Volume ID Publish Year Pages File Format Full-Text
54941 47032 2013 11 PDF Available
Title
X-ray absorption spectroscopy and heterogeneous catalysis: Performances at the SOLEIL's SAMBA beamline
Abstract

New plug-flow cells suitable for the X-ray absorption spectroscopy (XAS) study of heterogeneous catalysts by transmission and fluorescence detection modes are described. These cells are also suitable for combination with Raman spectroscopy providing valuable complementary information on the state of the catalyst in working conditions. On-line product analysis is obtained either by mass spectrometry or Raman spectroscopy providing a full description of the activity of the catalyst. These tools are successfully used for time-resolved investigations of heterogeneous catalysts in working conditions using the capability of the Quick-XAS monochromators installed at the SAMBA-SOLEIL beamline. The performances of the full set-up including spectrometers and reaction cells are illustrated by a study of the calcination step of a bimetallic hydrodesulphurisation catalyst and of the activation/reaction processes of a Fischer–Tropsch catalyst.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (261 K)Download as PowerPoint slideHighlight► New plug-flow cells developed on the SAMBA beamline are presented. ► These studies combined Quick-XAS/XRD or Quick-XAS/Raman. ► Raman spectroscopy is used for monitoring the gas products during operando study. ► For the calcination of HDS NiMo catalyst, MoO42− is formed by depolymerisation. ► During the Fischer–Tropsch synthesis, a further reduction of Co is observed.

Keywords
Quick-EXAFS; Operando spectroscopy; Catalytic cells; Combination of techniques
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X-ray absorption spectroscopy and heterogeneous catalysis: Performances at the SOLEIL's SAMBA beamline
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 205, 30 April 2013, Pages 148–158
Authors
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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