Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 17, Pages 5060-5064Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201409482
Keywords
glasses; heterogeneous catalysis; reaction kinetics; reaction mechanisms; supported catalysts
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Funding
- German Science Foundation (DFG)
- Fonds der Chemischen Industrie
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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.
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