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Issue 12, 2017
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Mass transfer and convection effects in small-scale catalytic hydrogenation

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Abstract

Rhodium-catalyzed hydrogenation of alkynes was studied under conditions of low concentration of substrate and either one or two equivalents of hydrogen using pressurized sample infusion electrospray ionization mass spectrometry (PSI-ESI-MS). Four sample vials of the same volume but of different diameter enabled the investigation of the effects of surface area on reaction rates. Running the same experiments with stirring on or off allowed further details to emerge, notably the obvious effects of convection thanks to the localized sampling technique employed. Modelling of the system allowed for a better understanding of the relative importance of the various factors in play (reaction rate, surface area, mass transfer, convection). These factors should be carefully considered when studying or optimizing reactions involving narrow reaction flasks, especially when those flasks are unstirred.

Graphical abstract: Mass transfer and convection effects in small-scale catalytic hydrogenation

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Publication details

The article was received on 15 Mar 2017, accepted on 16 May 2017 and first published on 17 May 2017


Article type: Paper
DOI: 10.1039/C7CY00492C
Citation: Catal. Sci. Technol., 2017,7, 2609-2615
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    Mass transfer and convection effects in small-scale catalytic hydrogenation

    J. Luo, Y. Wu, H. S. Zijlstra, D. A. Harrington and J. S. McIndoe, Catal. Sci. Technol., 2017, 7, 2609
    DOI: 10.1039/C7CY00492C

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