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In situ Monitoring of Coke Deposits during Coking and Regeneration of Solid Catalysts by Electrical Impedance-based Sensors

Title data

Müller, Norbert ; Moos, Ralf ; Jess, Andreas:
In situ Monitoring of Coke Deposits during Coking and Regeneration of Solid Catalysts by Electrical Impedance-based Sensors.
In: Chemical Engineering & Technology. Vol. 33 (2010) Issue 1 . - pp. 103-112.
ISSN 1521-4125
DOI: https://doi.org/10.1002/ceat.200900380

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No informationMO 1060/5-1 and JE 257/12-1

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The activity of solid catalysts is often substantially reduced by the formation of coke. The in situ monitoring of the coke load of catalyst particles could therefore be a controlling instrument of high value. Such sensors could be useful to measure the axial coke profile in a fixed bed reactor, both during coke formation and regeneration by coke burn-off. As a contribution to the development of such sensors, single particles of an alumina oxide catalyst were used as a model system. The particles were electrically contacted and characterized by electrical impedance spectroscopy. The coke formation/burn-off and the impedance were simultaneously measured in a magnetic suspension balance. A clear relationship between the coke loading and the respective electrical impedance signal could be observed, both during coke formation and during the regeneration by coke burn-off. Kinetic studies were conducted to verify the influence of mass transfer limitations on the impedance signal.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Coke formation; Impedance spectroscopy; Reforming; Regeneration; Sensor
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: 21 Jan 2015 11:15
Last Modified: 13 Nov 2015 10:15
URI: https://eref.uni-bayreuth.de/id/eprint/5673