Prof. Dr.-Ing. Dr. h. c. Uwe Hampel

Experimentelle Thermo­fluiddynamik
Tel.: +49 351 260 2772

Work package 3.2 - Scale-up of phase dispersion for structured multiphase reactors

Principal Investigator: Prof. Dr.-Ing. M. Grünewald (Ruhr-Universität Bochum)

PhD student: Corinna Hecht (Ruhr-Universität Bochum)

Main Scientific Goals:

The aim of this work package is selecting and characterizing distributor devices, which promise optimal process conditions and a high catalyst performance for two given reactor-catalysts-system.

Particular tasks:

  • Investigation of  the characteristic phase-distribution of different SiSiC-sponges in multiphase reactors
  • Developing of distribution devices for catalytic SiSiC-Sponges in multiphase reactors
  • Developing geometric conditions for periodic-open cell structures to improve the phase dispersion in multiphase reactors
  • Developing distribution devices for custom-made periodic-open cell structure which are selected by geometric aspects
  • Testing of compounds to substitute the hazardous compounds with compounds showing the same hydrodynamic behavior.  (First results show good results for the substitution.)

Experimental setup:

a) Sponge structure:

As suggested by the project partners the characteristic phase-distribution of sponges with 10, 20, 30 and 45 pores per inch (Fig.: 1) are tested.

To investigate the distribution characteristics and to develop a distribution device a wire mesh sensor is installed (Fig. 2).

 HEA-Hecht-3.2-Fig1  HEA-Hecht-3.2-Fig2
Figure 1: SiSiC-Sponges with 10, 20, 30 and 45 pores per Inch.   Figure 2: Set-up to investigate the characteristic distribution and the optima distribution device for specific sponges.

b) Periodic-open cell structure:

In cooperation with the TU Hamburg-Harburg a method to predict the free bubble rise in periodic-open cell structures is developed. As a result two periodic-open cell structures (Fig. 3) are printed by means of a rapid prototype printing. To investigate the quality of the phase-distribution integral and radial holdups are measured by means of a wire mesh sensor device (Fig. 4).

 HEA-Hecht-3.2-Fig3  HEA-WP3.2-Fig4-new
Figure 3: Periodic-open cell structure with a cell angle of 90°.  Figure 4: Experimental set-up to measure the hydrodynamic behavior in periodic-open cell structures. 


WP 2.1  : Develop the optima open-cell structure for an energy-enhancing application

WP 3.1  : Cooperation in investigating the hydrodynamic behavior in sponge reactors

WP 3.3  : Information about the mass transfer enhancing in bubbly flow by means of periodic-open cell structures

WP 4.3  : Verification of the distribution characteristics in sponge reactors


  • C. Hecht, M. Grünewald, Ruhr-Universität Bochum, C.-O. Möller, D. Bezecny, M. Schlüter, Technische Universität Hamburg-Harburg, New Structures for Enhancing Mass Transfer within Bubble Columns – From Mass Transfer Oberservations to Technical Implementation, International Symposium on Multiscale Multiphase Process Engineering - Hamburg, September 24-27, 2014.