Premium
Ermittlung optimaler Betriebseinstellungen für technische Wirbelschichtreaktoren
Author(s) -
Werther Joachim,
Hegner Bernd
Publication year - 1980
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330520205
Subject(s) - fluidized bed , bubble , mass transfer , catalysis , process engineering , chemistry , mechanics , materials science , chemical engineering , thermodynamics , engineering , chromatography , organic chemistry , physics
Determination of optimum operating conditions of industrial fluidized bed reactors . Fluidized bed technology has long been successfully used in numerous industrial processes. Nevertheless, the design and optimization of fluidized bed reactors still give rise to considerable difficulties owing to the complex nature of the gas/solids flow. Advances in the mathematical description of fluidized bed reactors have now been made by formulation of a model describing the catalytic reaction in a gas/solids fluidized bed in terms of absorption of reactants from the bubble phase with subsequent pseudohomogeneous reaction in the catalyst suspension surrounding the bubbles. Empirical relations are reported for mass transfer, specific transfer area, and bubble gas hold‐up, taking into account the influence of fluidized‐bed geometry which is of great importance in scale‐up. The state of development reached and the practical use of the model is demonstrated by evaluation of various reactions taken from the literature. Any desired reaction mechanism can be incorporated into the model. It is shown for the example of the selectivity behaviour of a system of consecutive reactions that a detailed knowledge of the reaction kinetics is a necessary condition for the design and operational optimization of industrial fluidized bed reactors.