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In situ-XAS and catalytic study of acrolein hydrogenation over silver catalyst: Control of intramolecular selectivity by the pressure

Bron, Michael and Teschner, Detre and Knop-Gericke, Axel and Scheybal, Andreas and Steinhauer, Bernd and Haevecker, Michael and Födisch, Ringo and Hönicke, Dieter and Schlögl, Robert and Claus, Peter (2005):
In situ-XAS and catalytic study of acrolein hydrogenation over silver catalyst: Control of intramolecular selectivity by the pressure.
In: Catalysis Communications, Elsevier B.V., pp. 371-374, 6, [Article]

Abstract

The gas phase hydrogenation of acrolein over 7.5% Ag/SiO2 has been studied in a broad pressure range from 7.5 mbar to 20 bar. Higher pressures favour the formation of allyl alcohol (selectivities up to 42%), whereas at low pressures propionaldehyde is by far the main product. In situ-XAS has been performed at 7.5 mbar in order to gain insight into the interaction of acrolein with Ag(1 1 1). Hydrogenated propionaldehyde-like surface species could be detected which orientated parallel to the surface. The observed intermediate correlates perfectly with the online catalytic data.

Item Type: Article
Erschienen: 2005
Creators: Bron, Michael and Teschner, Detre and Knop-Gericke, Axel and Scheybal, Andreas and Steinhauer, Bernd and Haevecker, Michael and Födisch, Ringo and Hönicke, Dieter and Schlögl, Robert and Claus, Peter
Title: In situ-XAS and catalytic study of acrolein hydrogenation over silver catalyst: Control of intramolecular selectivity by the pressure
Language: English
Abstract:

The gas phase hydrogenation of acrolein over 7.5% Ag/SiO2 has been studied in a broad pressure range from 7.5 mbar to 20 bar. Higher pressures favour the formation of allyl alcohol (selectivities up to 42%), whereas at low pressures propionaldehyde is by far the main product. In situ-XAS has been performed at 7.5 mbar in order to gain insight into the interaction of acrolein with Ag(1 1 1). Hydrogenated propionaldehyde-like surface species could be detected which orientated parallel to the surface. The observed intermediate correlates perfectly with the online catalytic data.

Journal or Publication Title: Catalysis Communications
Volume: 6
Publisher: Elsevier B.V.
Divisions: 07 Department of Chemistry > Fachgebiet Technische Chemie > Technische Chemie II
07 Department of Chemistry > Fachgebiet Technische Chemie
07 Department of Chemistry
Date Deposited: 20 Mar 2009 08:57
Identification Number: doi:10.1016/j.catcom.2005.02.013
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