Meßtechnik zur Charakterisierung von Gas/Flüssigkeits‐Reaktoren

Abstract

Measuring techniques for characterizing gas/liquid reactors. The article considers measuring techniques for the characterization of the phases in gas/liquid reactors. These include the velocity profile and turbulence in the continuous phase as well as holdup, size, and velocity of the dispersed phase. Also, methods for the determination of the specific interfacial area and the volumetric mass transfer coefficients are discussed. Measuring methods have made enormous advances in recent years. In spite of this, there is a lack of reliable methods, especially for use during reactions without disturbing the state of the reactor. It is suspected that probe technique will gradually fall into disuse and more and more attention will be focussed on contractless methods. This calls for further development of ultrasonic methods and methods relying on emission of light.

Reynolds shear stress for modeling of bubble column reactors

“…In the past years, progress in the field of computer design and data processing induced the development of a number of advanced measuring techniques for the investigation of two-phase flow (Schügerl et al, 1985; Buchholz, 1987). While a visual observer of bubble columns must draw the conclusion that the flow is of a totally stochastic nature, a closer examination using one of the novel 0888-5885/90/2629-0988$02.50/0 © 1990 American Chemical Society measuring techniques reveals regular structures.…”

Lokale fluiddynamische Parameter in Blasensäulenreaktoren bei höheren Flüssigkeitsviskositäten

“…schritte in der Computer-Technologie eine Anzahl lokal arbeitender MeBtechniken zur Erfassung von komplexen Mehrphasenstromungen entwickelt werden [3]. Dadurch …”