Microimaging of Transient Concentration Profiles of Reactant and Product Molecules during Catalytic Conversion in Nanoporous Materials1. Issue 17 (26th February 2015)

• Record Type: Journal Article
• Authors: Titze, Tobias; Chmelik, Christian; Kullmann, Jens; Prager, Lutz; Miersemann, Erich; Gläser, Roger; Enke, Dirk; Weitkamp, Jens; Kärger, Jörg
• Is Part Of: Angewandte Chemie international edition. Volume 54:Issue 17(2015)
• Page Start: 5060
• Page End: 5064
• Publication Date: 2015-02-26
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201409482
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Microimaging by IR microscopy is applied to the recording of the evolution of the concentration profiles of reactant and product molecules during catalytic reaction, notably during the hydrogenation of benzene to cyclohexane by nickel dispersed within a nanoporous glass. Being defined as the ratio between the reaction rate in the presence of and without diffusion limitation, the effectiveness factors of catalytic reactions were previously determined by deliberately varying the extent of transport limitation by changing a suitably chosen system parameter, such as the particle size and by comparison of the respective reaction rates. With the novel options of microimaging, effectiveness factors become accessible in a single measurement by simply monitoring the distribution of the reactant molecules over the catalyst particles.</p> </abstract>