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Direct detection of coking and regeneration of single particles and fixed bed reactors by electrical sensors

Title data

Müller, Norbert ; Kern, Christoph ; Moos, Ralf ; Jess, Andreas:
Direct detection of coking and regeneration of single particles and fixed bed reactors by electrical sensors.
In: Applied Catalysis A: General. Vol. 382 (2010) Issue 2 . - pp. 254-262.
ISSN 1873-3875
DOI: https://doi.org/10.1016/j.apcata.2010.05.001

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No informationMo 1060/5-1
No informationJe 257/12

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The activity of solid catalysts is often reduced by the formation of coke. Thus, regeneration by coke burn-off is needed from time to time. A new method to monitor in situ the coke load during coking and decoking by electrical sensors is presented, which could be used as a controlling instrument of high value. Single particles of an Al2O3 catalyst were electrically contacted and characterised by impedance spectroscopy. A clear relationship between coke load and the impedance is observed. The sensor was tested by regeneration experiments both with single particles and in a coked fixed bed reactor. The results show that the coke burn-off within a single coked catalyst particle can be monitored and that it is possible to distinguish how strong the decoking of a single particle is influenced by pore diffusion. For a fixed bed, the axial coke profile can be monitored by means of axially distributed sensors, and the velocity of the reaction front and the length of the reaction zone are directly deduced by the local change of the coke profile with time.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Regeneration; Coke burn-off; Sensor; Ompedance specroscopy
Institutions of the University: Faculties
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 > Faculty of Engineering Science > Chair Functional Materials
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
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: 26 Jan 2015 08:20
Last Modified: 13 Nov 2015 10:15
URI: https://eref.uni-bayreuth.de/id/eprint/5657