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Axial Dispersion and Wall Effects in Narrow Fixed Bed Reactors : A Comparative Study Based on RTD and NMR Measurements

Title data

Tang, Dahai ; Jess, Andreas ; Ren, Xiaohong ; Blümich, Bernhard ; Stapf, Siegfried:
Axial Dispersion and Wall Effects in Narrow Fixed Bed Reactors : A Comparative Study Based on RTD and NMR Measurements.
In: Chemical Engineering & Technology. Vol. 27 (2004) Issue 8 . - pp. 866-873.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.200402076

Official URL: Volltext

Abstract in another language

Axial dispersion and wall effects in narrow fixed beds with aspect ratios < 10 were investigated, both by classical methods and by NMR imaging. The residence time distribution (RTD) in the center and at the wall was measured, system water/NaCl-solution as tracer, and subsequently compared with radial velocity profiles based on NMR imaging. The influence of the aspect ratio and Rep on dispersion and on the degree of non-uniformity of the velocity profile was studied. The NMR results are consistent with the RTD and also with literature data of numerical simulations. For low aspect ratios, dispersion/wall effects have a strong influence on the reactor behavior, above all, in cases where a low effluent concentration is essential, as proven by breakthrough experiments with the reaction of H2S with ZnO.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Modeling; Reactors; Fixed bed; Residence time distribution
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: 24 Apr 2015 09:01
Last Modified: 27 May 2015 12:04
URI: https://eref.uni-bayreuth.de/id/eprint/10680