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Heterogeneously Catalyzed Epimerization of Menthol Stereoisomers – An Instructive Example to Account for Diffusion Limitations in Complex Reaction Networks

Title data

Etzold, Bastian ; Jess, Andreas:
Heterogeneously Catalyzed Epimerization of Menthol Stereoisomers – An Instructive Example to Account for Diffusion Limitations in Complex Reaction Networks.
In: Chemical Engineering & Technology. Vol. 31 (2008) Issue 9 . - pp. 1282-1289.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.200700486

Official URL: Volltext

Abstract in another language

The heterogeneously catalyzed epimerization of menthol stereoisomers is an important step in the synthesis of (–)-menthol by the Haarmann and Reimer process. For an accurate design of a technical reactor, the intrinsic kinetics as well as pore diffusion limitations have to be taken into account. The epimerization consists of a complex reaction network and so a simple approach using effectiveness factors based on Thiele moduli is not possible. In this work, a method is presented to simultaneously calculate the change in concentrations in the bulk phase as well as within the porous particles with time (fixed bed reactor) or local position (batch reactor). A commercially available numerical software was used to solve the differential equations.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Epimerization; Mass transfer; Menthol; Pore diffusion
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: 22 Jan 2015 08:10
Last Modified: 03 Feb 2015 11:02
URI: https://eref.uni-bayreuth.de/id/eprint/5823