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Title (Primary) Migrating temperature "thermo-chromatographic" pulses (TCP) initiated by radio-frequency (RF) heating
Author Kraus, M.; Kopinke, F.-D.; Roland, U.
Journal Journal of Microwave Power and Electromagnetic Energy
Year 2012
Department TUCHEM
Volume 46
Issue 4
Page From 241
Page To 252
Language englisch
Keywords Radio frequency; selective heating; thermo-chromatographic pulse; zeolite
Abstract In the present study, the astonishing influence of water dosage on a purged dry packed bed of NaY zeolite in the presence of an electric field with a frequency of 13.56 MHz was investigated. The injection of a small amount of water to the inlet of the bed led to pronounced selective heating of the inlet zone by more than 150 K. Thus, water represented a very effective coupling medium for dielectric heating. The selectively heated zone then slowly moved through the whole packed bed and a water pulse finally left the zeolite. This effect correlated with a coupled water and heat flux was called thermo-chromatographic pulse (TCP) emphasizing its analogy to chromatography. The phenomenon could not be performed by using conventional (convective) or microwave heating. It was demonstrated under various conditions and explained by a new model based on own experimental results as well as data from literature. The model will be the objective of a forthcoming publication.

Persistent UFZ Identifier
Kraus, M., Kopinke, F.-D., Roland, U. (2012):
Migrating temperature "thermo-chromatographic" pulses (TCP) initiated by radio-frequency (RF) heating
J. Microw. Power Electromagn. Energy 46 (4), 241 - 252