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Influence of Bubble Evolution on the Effective Kinetics of Heterogeneously Catalyzed Gas/Liquid Reactions. Part II: Exothermic Gas/Liquid Reactions

Title data

Oehmichen, Thomas ; Datsevich, Leonid ; Jess, Andreas:
Influence of Bubble Evolution on the Effective Kinetics of Heterogeneously Catalyzed Gas/Liquid Reactions. Part II: Exothermic Gas/Liquid Reactions.
In: Chemical Engineering & Technology. Vol. 33 (2010) Issue 6 . - pp. 921-931.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.201000014

Official URL: Volltext

Abstract in another language

For heterogeneously catalyzed multiphase reactions the formation of bubbles may have an influence on the effective reaction rate. This second of a series of two contributions deals with the Ni-catalyzed hydrogenation of hexene, which was used as a model system for an exothermic gas/liquid (G/L) reaction, where gas/vapor bubbles may be generated by overheating of the catalyst. (In part I, results of catalytic H2O2 decomposition were presented, where the evolution of gas bubbles (O2) always occurs.) A criterion for the formation of vapor bubbles for exothermic G/L reactions is presented, which was verified by experiments in a reactor with an inspection window. For a particle diameter of 6 mm, the effective kinetics of hexene hydrogenation is influenced by internal and external mass and heat transfer. A new and simple method to estimate the mass and heat transfer parameters and the effectiveness factors with regard to pore and external diffusion is presented, which combines the measured temperature difference(s) and the effective rate. For the given reaction conditions, the rate of hexene hydrogenation is not influenced by the evolution of vapor bubbles.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Bubble evolution; Hexene; Hydrogenation; Mass and heat transfer
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Faculties
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 02 Feb 2015 11:12
Last Modified: 02 Feb 2015 11:12
URI: https://eref.uni-bayreuth.de/id/eprint/6151